steel wire rope tensile strength made in china

Electric galvanized wire rope is to coat the zinc layer by electricity through an external power source. There is no chemical reaction on its surface, so it is still the natural color of zinc, which looks brighter than the hot dipped one. And the cost is lower than the hot dipped one due to the simpler production process.

Wire ropes can be seen everywhere around us, they are made of strands or bundles of individual wires constructed around an independent core, suitable for construction, industrial, fitness, commercial, architectural, agricultural, and marine rigging applications.

Wire rod is made from high carbon steel wires(0.35 to 0.85 percent carbon) in a hot rolling process of a required diameter, usually from 5.5mm to 8 mm.

Wire rod is drawn to the required diameter by the 1st drawing machine after descaling dust and rust, adding mechanical properties suitable for application.

Positioning the wires different or the same size lay in multiple layers and same direction, or cross lay and diameter is maintained by one-third of the rope size.

So in theory, it is very simple to manufacture wire ropes. However there are many more details that must be closely monitored and controlled, and this requires time and experienced personnel since it is a super complicated project you cannot imagine.

Made of multiple strands wound together, the steel Wire Rope is one of the most crucial components in a Crane. Each strand has a tensile strength ranging between 1470 N/mm2 and 2160N/mm2.As the load carrying rope used in the Hoisting Mechanism, it can be sent through different surface treatment to suit specific environmental condition.

Designed for higher breaking strength and better strength to weight ratio, our Crane Wire Rope is made of high-toughness steel wires that have been stretched to their tolerance limit prior to being stranded together to form a rope with optimum spacing between each strand.

Even if wire strands are tightly twisted, there still be spaces in places where the strand touches with each other. To improve the fill factor of the wire rope, we have added irregularly-shaped wire strand to the rope and sent it through rotary swaging process. Steel wires that are laid in a parallel pattern increase the cross section of the rope.

Special-purpose steel rope is commonly seen in various engineering projects. Via precision design and rigorous test, the rope usually can meet very high safety standards.

Suspended Platform And Working Platform are widely used for repairing work, maintenance of a building, installing the billboards on high rise towers, welding, cleaning and painting for large ships and more. Jaypee India uses high quality materials like stainless steel and aluminium to manufacture these suspended rope platform hoists. A stringent quality check is done to ensure the strength parameters and provide just the very best to the customers.

Anti-Tilting Safety Lock for Rope Breakage.Electrical Control System.High Quality Steel Wire Rope.Optional Overload Sensor.3-8 Degree Cable Locking Angle.Advanced Suspension Mechanism

New design Rope Guide pulley is provided on the roof device for easy pulling of the wire rope on top. A new rope locking device is also provided on the roof device middle beam to lock it and the wire rope is crimped with aluminum

Control panel body is made of good finish stainless steel which gives longer life. It contains all electrical components of Schneider, the ELCB & contractors. 3 pin Electric power socket of European design on bottom of panel is also provided.

Suspended platform, a kind of temporary suspended access equipment, also known as suspended cradle or gondola, so this wire rope also called as cradle wire rope or gondola rope.

Gondola Ropes are cables that are utilized in the temporary installation of suspended access equipment, window cleaning scaffolding, and manual hoisting equipment.

6 x 19 wire rope is a general purpose steel rope that’s widely used and is commonly used for winch lines, skylines and chokers. This wire rope overs a great overall combination of both flexibility and wear resistance.

* EIPS (Extra Improved Plowed Steel) wire rope has roughly 10% more strength than regular IPS. Independent wire rope core ( IWRC ) provides added strength, reduces the amount of stretch. IWRC wire rope also is resistance to heat and provides extra corrosion resistance over a typical bright wire finish.

Due to the high bearing capacity and stiffness, the prestressed concrete (PC) structures are widely used in large-span building, bridge and hydraulic structures [1]. The PC structures adopt either bonded or unbounded systems and are usually considered to acquire sufficient durability due to the limitation of concrete cracking and appropriate protection measures for the high-strength wires and strands [2,3]. However, prestress failures in PC structures have been reported in literature. Schupack and Suarez [4] showed, through an investigation from 1978 to 1982 in USA, about 50 PC structures had undergone different degrees of corrosion, among which 10 cases were caused by stress corrosion or hydrogen brittleness. Hydrogen is introduced by the improperly pickling process in general. As for the hydrogen-induced stress corrosion cracking mechanism, Vehovar et al. [5] reported its cause as the embrittlement of the prestressing tendons due to the penetration of hydrogen atoms, generated by hydrogen reduction at the alloy’s surface. Enos and Scully et al. [6] used a simulated steel-concrete interface and laboratory-scale prestressed concrete pilings to study the safe cathodic protection limits for prestressing steel in concrete about hydrogen embrittlement. Moreover, the dislocations in the prestressing tendons relative to the production process and heat treatment are sensitive to hydrogen embrittlement. On this basis, Gertsman [7] and Jaka Kovac et al. [8] studied and characterized the intergranular SCC (IGSCC) processes. The results show that geometrical parameters and chemical parameters play an important role in the intergranular stress corrosion cracking of materials.

Walter [9] reported 242 cases of prestress failure, from 1951 to 1979, among which a large portion were attributed to the environmental actions. Among these failure causes, the stress corrosion cracking (SCC) is always a main engineering concern as it reduces the fracture strength of high-strength steel wires, leading to unexpected brittle failures of PC structures [10,11]. Moreover, the SCC can be sensitive to the aggressive agents present in the corrosive environments [12].

The SCC is caused by the combined action of stress, environmental agents and metal components, and the widely accepted mechanisms include the surface (depassivation) film of wires is broken jointly by the tensile stress and the environmental actions; the freshly exposed steel surface serves as the anode dissolved at the crack tip, leading to the steel fracture [13,14]. The conventional test methods include the deformation, sustained loading and slow strain rate testing [15]. During the mechanical loading, the electrochemical methods have been used to characterize the SCC process, identifying the susceptibility potential range for prestress wires [8,16] and detecting the stress corrosion fracture of a stainless steel through the phase shift of electrochemical impedance spectroscopy (EIS) [17]. As for the corrosive environment, a SCC test method was developed by the International Prestressed Concrete Federation (FIP, now merged into fib), using ammonium thiocyanate (NH4SCN) solution as the corrosive environment for SCC test. This method has been standardized by ISO 15630 [18] and GB/T 21839 [19]. Perrin et al. [20] used this method to investigate the SCC mechanisms together with detection of EIS, electrochemical noise and metallographic analysis, and confirmed the validity of this method for SCC investigation.

Nowadays, high-strength steel wires for civil engineering use are usually classified following the mechanical properties including the rupture strength and the elongation, with a rough account for chemical compositions [21,22,23]. However, the SCC risk of high-strength steel is rather sensitive to the chemical composition. Thus, the SCC performance should always be investigated with respect to the environmental actions and steel chemical compositions. Accordingly, it is of interest to compare the SCC performance for streel wires with similar chemical compositions from different standards. To this purpose, this study retains three steel wires, conforming to BS 5896 [21] and GB/T 5224 [22], and investigates the SCC resistance of these wires through stress-immersion tests and the role of stress on the electrochemical behaviors.

As specialist for manufacturing quality steel wire ropes over 20 years, our company can supply strong, durable and reliable ropes that capable to minimize your downtime and maximize cost effectiveness. Decades of experience we owned make us know clearly the work you do and capable to provide professional guidance.

We select the best steel or stainless steel as raw material for wire rope manufacturing. Our products are manufactured under strict quality managements and test before they leave the factory.

Our engineers can provide professional advice about picking up optimal steel wire ropes for their application, installation guidance to ensure maximum return in their wire rope system.

If you are going to pick up steel wire ropes that suit your project perfectly, you must have an ideal about the construction about them. Our company can supply bright wire rope, galvanized wire rope, stainless steel wire rope, compacted wire rope, rotation resistant wire ropes, mining wire rope, elevator wire rope, crane wire rope and gas & oilfield wire ropes. Here are some details to solve the problem that may puzzle you whether you are browsing the web or picking up steel wire ropes.

Bright steel wire ropes mean no surface treatment is applied to the rope. Therefore, they have the lower price among these three wire ropes. Generally, they are fully lubricated to protect the rope from rust and corrosion.

Galvanized steel wire ropes feature compressed zinc coating for providing excellent corrosion resistance. With higher break strength yet lower price than stainless steel, galvanized steel wire ropes are widely used in general engineering applications such as winches and security ropes.

Stainless steel wire ropes, made of quality 304, 305, 316 steels, are the most corrosive type for marine environments and other places subjected to salt water spray. Meanwhile, bright and shiny appearance can be maintained for years rather than dull as galvanized steel wire ropes.

Steel wire ropes are composed of multiple strands of individual wires that surrounding a wire or fiber center to form a combination with excellent fatigue and abrasion resistance. These wires and strands are wound in different directions to from different lay types as follows:

Beside above lay types, alternative lay ropes which combine regular lay and lang lay together and ideal for boom hoist and winch lines, can also be supplied as your request.

Two main methods about seizing steel wire ropes in conjunction with soft or annealing wire or strands to protect cut ends of the ropes form loosening.

This machine is a kind of electric tensile tester which uses the motor to drive ball screw to move fixture. Place the sample between the upper and lower fixture, use a given speed to pull the upper fixture upward, and the upper load cell with sensor to check tensile strength and convert the strength into voltage sign and output to the display screen. And the strength value will be displayed automatically on the computer.

Established in 2005, Jiangsu Safety Steel Wire Rope Co., Ltd. is a professional steel wire rope manufacturer and exporter with a profound experience. The company is located in Wuxi, Jiangsu, China covering an area of 57,108.70 square meters. They have a total annual production of steel wire rope is 25000 to 30000 tons and a registered capital 13 million U.S. dollars. Jiangsu Safety Steel Wire Rope Co., Ltd. has plenty of high-quality products to offer.Toho-Rongkee

Chongqing Toho-Rongkee Electronic and Machinery Co., Ltd is one of the best wire rope manufacturers in China that follows ISO 9001:2008, TUV, CE, SGS qualification standard on every production method and fabricated. Also offer a wide range of lifting tools, equipment, and various riggings that meet your standards. Employs over 1000 skilled workers and staff in 7 advanced factories in China.Tianli Stainless Steel Products Co., Ltd

Tianli Stainless Steel Products Co., Ltd is specialized in manufacturing steel wire ropes headquarters in Dainan Town, Jiangsu Province China. Currently having more than 50 existing employees in over 6600 square meters factory area. They can provide excellent advice and assistance to ensure you obtain the right products at the lowest cost.Guizhou Wire Rope Incorporated Company

With more than 40 years of manufacturing and technique experience, you can totally rely on Guizhou Wire Rope Incorporated Company, they have excellent production lines, modern production techniques, and excellent quality control systems. All products such as steel wire, pre-stressed wire rope, PVC coated wire rope, etc. are not only famous with excellent quality but in reasonable prices and considerate services in China. This company also receives good popularity in the overseas market.Nantong Jiaan Metal Material Co., Ltd.

Established in 2013, Jiaan Metal Material is one of the respected manufacturers of steel wire rope located in Nantong, Jiangsu, China. All the production methods, from raw material smelting, heat treatment, wire drawing, and rope twisting to physical and chemical performance examining, are under strict and scientific control based on ISO 9001 certification standard.Nantong Lili hardware products Co., Ltd.

Started in 1998, Nantong Lili hardware products Co., Ltd. continually improving and striving to provide high-grade wire rope to customers worldwide. ISO9001:2008, ISO14001:2004 certified company located in Jiangsu, China. They mainly engaged in producing steel wire rope, stainless steel wire, steel strip, stainless steel strip, spring steel strip, spring steel wire, carbon steel wire, and more.Nantong New Jianghai Internation Trade Co., Ltd.

Set up in the year 2016, Nantong New Jianghai Internation Trade Co., Ltd is an expert wire rope provider situated in Nantong, China. Owns advanced technologies and machinery to manufacture a high-class and comprehensive quality solution. They have more than 70 professional employees working and improving products according to ISO9001:2015 authentication.Jiangsu Zhongying Steel Cable Co., Ltd.

Established in 2004, Zhongying Steel Cable is one of the leading manufacturers and reputable provider of steel wire ropes situated in Nantong, Jiangsu, China. Their factory has 80, 000 square meters and the building area is about to 65,000 square meters. Workshops are equipped with advanced producing equipment and comprehensive testing facilities that’s why the partnership with them will bring business satisfaction for you.Qingdao Haito Rigging Hardware Co., Ltd

A large enterprise located in Qingdao, Shandong, China, which engaged in manufacturing rigging hardware such as steel wire rope accessories, wire rope clips, load binder, chain, wire rope, and more. They have an abundant supply of superior quality products. Founded in 2009, Haito Rigging Hardware continuously developed and improving products supported by good experience and professional employees.Gustav Wolf

With over 130 years of experience and development, Gustav Wolf is a leading superior steel wire and steel wire ropes manufacturer associated with quality and safety. Produced products according to ISO9001:2015, ISO14001:2015 certification which can meet your requirements and demands. Employs over 115 hardworking workers and staff who aim to serve customers with honesty, loyalty, and perseverance.Jiangsu Xiangchuan Rope Technology Co., Ltd.

Specialized in manufacturing high-standard wire rope, Xiangchuan Rope Technology is a dedicated supplier and manufacturer with vast experience in the field. Own a modern facility with an area of about 38, 000 square meters and employs 138 staff members and workers. Their advanced production equipment, technical know-how, skilled workers guarantee that in Xiangchuan Rope Technology you have a reliable partner.JULI SLING CO., LTD.

For more than 33 years of experience in creating comprehensive products such as wire rope, JULI SLING earned a good reputation in the steel industry appreciated by foreign and domestics customers. JULI is recognized as a pioneer in China’s lifting and rigging industry, the standard makers in rigging field, the advocate of worldwide rigging civilization. Partnership with this company will skyrocket your business project.Nantong Julong Metal Products Co., Ltd

Nantong Julong Metal Products Co., Ltd is a large private enterprise founded in 2009 that specialized in producing any types of wire rope, headquarters in Jiangsu, China. Get 100% ideal products, at a cost-effective price here in Julong Metal. Be one of their satisfied customers such as in Europe, Africa, North America, South America, Asia, the Middle East, etc.YunFeng Steel Wire Rope Products Ltd.

Located in Jiangsu province, China, YunFeng Steel Wire Rope is a professional manufacturer of all kinds of wire rope offer in excellent quality and reasonable price to customers. They can meet customers’ demands and requirements by manufacturing all kinds of products with international standards.Sinounion Industries

Founded in 1999, Sinounion Industries is a professional Steel Wire Rope manufacturer in China. Also offer Rigging Hardware, Lifting Equipment, and various Forging & Casting products. All products are manufactured according to ISO9001, ISO14001, CE, and GS standards. The company owns a wide factory area in Qingdao, Shandong province with about 35000 square meters.Ningbo BST Metal Products Co., Ltd.

Established in 2002, BST Metal Products is one of the largest and reputable steel wire rope manufacturers in China with an area of 78,000 square meters factory workshop. Backed up by more than 350 professional people & technical engineers who have a vast experience in the field, BST Metal Products ensure great and fast production exceed the national and international guidelines.Jiangsu Yasheng Metal Products Co., Ltd.

As an ISO9001:2015, ISO/TS16949:2009, ISO9001: 2000 certified company, Jiangsu Yasheng Metal Products Co., Ltd. devoted itself to producing excellent products at a favorable cost. If you`re looking for a wire rope manufacturer, then Yasheng Metal Products is the best choice! Get 100% quality products prepared by solid technical strength and professional service team.Chongqing Geyo Machinery corporation

Geyo Machinery corporation a reliable manufacturing company that focuses on research, production, sales, and service of high-quality products. Mainly engaged in manufacturing wire rope, wire rope slings, tamping rammer, power trowel, scarifying machine, etc. They have their own advanced production facilities, expert technical team, and a professional quality control team.SHANGHAIMETAL

Started in the year 1980, SHANGHAIMETAL is a premier wire rope provider. Together with a team of experts, innovative machinery, and dedicated workers, they guarantee absolute customer satisfaction. Shanghai Metal is always passionate about working and supplying excellent services to clients throughout the world. All their products are manufactured with high-quality at a reasonable cost.Huazhuo HD Machinery

Established in 1958, Qingdao Huazhuo HD Machinery Co., Ltd. is a trusted wire rope manufacturer with a profound experience, strong workmanship, and professional service team that ensures the best product at best price offer to clients around the world. A leading supplier of high-standard wire rope, rigging hardware, marine hardware, chain, lifting tools, and other high-grade metal products.

Ungalvanized and galvanized steel wire rope is a kind of interwoven flexible cord, which consists of strands of thin wire. It has advantages of high strength, light weight, smooth work and not easy to suddenly broken. Besides, they can serve in many circumstances. And Special specification and marks can be made according to customers requirement.

Wire rope is made of plaiting strands of wire – normally medium carbon steel –into a thick cable. The strands are formed around a core. The strands in wire ropes are made of wore twisted together. Strands with smaller diameter wires are less abrasion resistant and more fatigue resistant. Strands made with thicker length of wore are more abrasion resistant and less fatigue resistant.

Left-hand ordinary lay (LHOL) wire rope (close-up). Right-hand lay strands are laid into a left-hand lay rope. Right-hand Lang"s lay (RHLL) wire rope (close-up). Right-hand lay strands are laid into a right-hand lay rope.

Left hand lay or right hand lay describe the manner in which the strands are laid to form the rope. To determine the lay of strands in the rope, a viewer looks at the rope as it points away from them. If the strands appear to turn in a clockwise direction, or like a right-hand thread, as the strands progress away from the viewer, the rope has a right hand lay. The picture of steel wire rope on this page shows a rope with right hand lay. If the strands appear to turn in an anti-clockwise direction, or like a left-hand thread, as the strands progress away from the viewer, the rope has a left hand lay.

Ordinary and Lang"s lay describe the manner in which the wires are laid to form a strand of the wire rope. To determine which has been used first identify if left or right hand lay has been used to make the rope. Then identify if a right or left hand lay has been used to twist the wires in each strand. Ordinary lay The lay of wires in each strand is in the opposite direction to the lay of the strands that form the wire.

Alternate lay The lay of wires in the strands alternate around the rope between being in the opposite and same direction to the lay of the strands that form the wire rope.

The specification of a wire rope type – including the number of wires per strand, the number of strands, and the lay of the rope – is documented using a commonly accepted coding system, consisting of a number of abbreviations.

This is easily demonstrated with a simple example. The rope shown in the figure "Wire rope construction" is designated thus: 6x19 FC RH OL FSWR 6 Number of strands that make up the rope

Each of the sections of the wire rope designation described above is variable. There are therefore a large number of combinations of wire rope that can be specified in this manner. The following abbreviations are commonly used to specify a wire rope. Abbr. Description

The end of a wire rope tends to fray readily, and cannot be easily connected to plant and equipment. A number of different mechanisms exist to secure the ends of wire ropes to make them more useful. The most common and useful type of end fitting for a wire rope is when the end is turned back to form a loop. The loose end is then fixed by any number of methods back to the wire rope.

When the wire rope is terminated with a loop, there is a risk that the wire rope can bend too tightly, especially when the loop is connected to a device that spreads the load over a relatively small area. A thimble can be installed inside the loop to preserve the natural shape of the loop, and protect the cable from pinching and abrasion on the inside of the loop. The use of thimbles in loops is industry best practice. The thimble prevents the load from coming into direct contact with the wires.

A wire rope clamp, also called a clip, is used to fix the loose end of the loop back to the wire rope. It usually consists of a u-shaped bolt, a forged saddle and two nuts. The two layers of wire rope are placed in the u-bolt. The saddle is then fitted over the ropes on to the bolt (the saddle includes two holes to fit to the u-bolt). The nuts secure the arrangement in place. Three or more clamps are usually used to terminate a wire rope.

Swaging is a method of wire rope termination that refers to the installation technique. The purpose of swaging wire rope fittings is to connect two wire rope ends together, or to otherwise terminate one end of wire rope to something else. A mechanical or hydraulic swager is used to compress and deform the fitting, creating a permanent connection. There are many types of swaged fittings. Threaded Studs, Ferrules, Sockets, and Sleeves a few examples.

A socket termination is useful when the fitting needs to be replaced frequently. For example, if the end of a wire rope is in a high-wear region, the rope may be periodically trimmed, requiring the termination hardware to be removed and reapplied. An example of this is on the ends of the drag ropes on a dragline. The end loop of the wire rope enters a tapered opening in the socket, wrapped around a separate component called the wedge. The arrangement is knocked in place, and load gradually eased onto the rope. As the load increases on the wire rope, the wedge become more secure, gripping the rope tighter.

Wire rope and cable are each considered a “machine”. The configuration and method of manufacture combined with the proper selection of material when designed for a specific purpose enables a wire rope or cable to transmit forces, motion and energy in some predetermined manner and to some desired end.

Two or more wires concentrically laid around a center wire is called a strand. It may consist of one or more layers. Typically, the number of wires in a strand is 7, 19 or 37. A group of strands laid around a core would be called a cable or wire rope. In terms of product designation, 7 strands with 19 wires in each strand would be a 7×19 cable: 7 strands with 7 wires in each strand would be a 7×7 cable.

Materials Different applications for wire rope present varying demands for strength, abrasion and corrosion resistance. In order to meet these requirements, wire rope is produced in a number of different materials.

Stainless Steel This is used where corrosion is a prime factor and the cost increase warrants its use. The 18% chromium, 8% nickel alloy known as type 302 is the most common grade accepted due to both corrosion resistance and high strength. Other types frequently used in wire rope are 304, 305, 316 and 321, each having its specific advantage over the other. Type 305 is used where non-magnetic properties are required, however, there is a slight loss of strength.

Galvanized Carbon Steel This is used where strength is a prime factor and corrosion resistance is not great enough to require the use of stainless steel. The lower cost is usually a consideration in the selection of galvanized carbon steel. Wires used in these wire ropes are individually coated with a layer of zinc which offers a good measure of protection from corrosive elements.

Cable Construction The greater the number of wires in a strand or cable of a given diameter, the more flexibility it has. A 1×7 or a 1×19 strand, having 7 and 19 wires respectively, is used principally as a fixed member, as a straight linkage, or where flexing is minimal.

Selecting Wire Rope When selecting a wire rope to give the best service, there are four requirements which should be given consideration. A proper choice is made by correctly estimating the relative importance of these requirements and selecting a rope which has the qualities best suited to withstand the effects of continued use. The rope should possess:Strength sufficient to take care of the maximum load that may be applied, with a proper safety factor.

Strength Wire rope in service is subjected to several kinds of stresses. The stresses most frequently encountered are direct tension, stress due to acceleration, stress due to sudden or shock loads, stress due to bending, and stress resulting from several forces acting at one time. For the most part, these stresses can be converted into terms of simple tension, and a rope of approximately the correct strength can be chosen. As the strength of a wire rope is determined by its, size, grade and construction, these three factors should be considered.

Safety Factors The safety factor is the ratio of the strength of the rope to the working load. A wire rope with a strength of 10,000 pounds and a total working load of 2,000 pounds would be operating with a safety factor of five.

It is not possible to set safety factors for the various types of wire rope using equipment, as this factor can vary with conditions on individual units of equipment.

The proper safety factor depends not only on the loads applied, but also on the speed of operation, shock load applied, the type of fittings used for securing the rope ends, the acceleration and deceleration, the length of rope, the number, size and location of sheaves and drums, the factors causing abrasion and corrosion and the facilities for inspection.

Fatigue Fatigue failure of the wires in a wire rope is the result of the propagation of small cracks under repeated applications of bending loads. It occurs when ropes operate over comparatively small sheaves or drums. The repeated bending of the individual wires, as the rope bends when passing over the sheaves or drums, and the straightening of the individual wires, as the rope leaves the sheaves or drums, causing fatigue. The effect of fatigue on wires is illustrated by bending a wire repeatedly back and forth until it breaks.

The best means of preventing early fatigue of wire ropes is to use sheaves and drums of adequate size. To increase the resistance to fatigue, a rope of more flexible construction should be used, as increased flexibility is secured through the use of smaller wires.

Abrasive Wear The ability of a wire rope to withstand abrasion is determined by the size, the carbon and manganese content, the heat treatment of the outer wires and the construction of the rope. The larger outer wires of the less flexible constructions are better able to withstand abrasion than the finer outer wires of the more flexible ropes. The higher carbon and manganese content and the heat treatment used in producing wire for the stronger ropes, make the higher grade ropes better able to withstand abrasive wear than the lower grade ropes.

Effects of Bending All wire ropes, except stationary ropes used as guys or supports, are subjected to bending around sheaves or drums. The service obtained from wire ropes is, to a large extent, dependent upon the proper choice and location of the sheaves and drums about which it operates.

A wire rope may be considered a machine in which the individual elements (wires and strands) slide upon each other when the rope is bent. Therefore, as a prerequisite to the satisfactory operation of wire rope over sheaves and drums, the rope must be properly lubricated.

Loss of strength due to bending is caused by the inability of the individual strands and wires to adjust themselves to their changed position when the rope is bent. Tests made by the National Institute of Standards and Technology show that the rope strength decreases in a marked degree as the sheave diameter grows smaller with respect to the diameter of the rope. The loss of strength due to bending wire ropes over the sheaves found in common use will not exceed 6% and will usually be about 4%.

The bending of a wire rope is accompanied by readjustment in the positions of the strands and wires and results in actual bending of the wires. Repetitive flexing of the wires develops bending loads which, even though well within the elastic limit of the wires, set up points of stress concentration.

The fatigue effect of bending appears in the form of small cracks in the wires at these over-stressed foci. These cracks propagate under repeated stress cycles, until the remaining sound metal is inadequate to withstand the bending load. This results in broken wires showing no apparent contraction of cross section.

Experience has established the fact that from the service view-point, a very definite relationship exists between the size of the individual outer wires of a wire rope and the size of the sheave or drum about which it operates. Sheaves and drums smaller than 200 times the diameter of the outer wires will cause permanent set in a heavily loaded rope. Good practice requires the use of sheaves and drums with diameters 800 times the diameter of the outer wires in the rope for heavily loaded fast-moving ropes.

It is impossible to give a definite minimum size of sheave or drum about which a wire rope will operate with satisfactory results, because of the other factors affecting the useful life of the rope. If the loads are light or the speed slow, smaller sheaves and drums can be used without causing early fatigue of the wires than if the loads are heavy or the speed is fast. Reverse bends, where a rope is bent in one direction and then in the opposite direction, cause excessive fatigue and should be avoided whenever possible. When a reverse bend is necessary larger sheaves are required than would be the case if the rope were bent in one direction only.

Stretch of Wire Rope The stretch of a wire rope under load is the result of two components: the structural stretch and the elastic stretch. Structural stretch of wire rope is caused by the lengthening of the rope lay, compression of the core and adjustment of the wires and strands to the load placed upon the wire rope. The elastic stretch is caused by elongation of the wires.

The structural stretch varies with the size of core, the lengths of lays and the construction of the rope. This stretch also varies with the loads imposed and the amount of bending to which the rope is subjected. For estimating this stretch the value of one-half percent, or .005 times the length of the rope under load, gives an approximate figure. If loads are light, one-quarter percent or .0025 times the rope length may be used. With heavy loads, this stretch may approach one percent, or .01 times the rope length.

The elastic stretch of a wire rope is directly proportional to the load and the length of rope under load, and inversely proportional to the metallic area and modulus of elasticity. This applies only to loads that do not exceed the elastic limit of a wire rope. The elastic limit of stainless steel wire rope is approximately 60% of its breaking strength and for galvanized ropes it is approximately 50%.

Preformed Wire Ropes Preformed ropes differ from the standard, or non-preformed ropes, in that the individual wires in the strands and the strands in the rope are preformed, or pre-shaped to their proper shape before they are assembled in the finished rope.

This, in turn, results in preformed wire ropes having the following characteristics:They can be cut without the seizings necessary to retain the rope structure of non-preformed ropes.

They are substantially free from liveliness and twisting tendencies. This makes installation and handling easier, and lessens the likelihood of damage to the rope from kinking or fouling. Preforming permits the more general use of Lang lay and wire core constructions.

Removal of internal stresses increase resistance to fatigue from bending. This results in increased service where ability to withstand bending is the important requirement. It also permits the use of ropes with larger outer wires, when increased wear resistance is desired.

Outer wires will wear thinner before breaking, and broken wire ends will not protrude from the rope to injure worker’s hands, to nick and distort adjacent wires, or to wear sheaves and drums. Because of the fact that broken wire ends do not porcupine, they are not as noticeable as they are in non-preformed ropes. This necessitates the use of greater care when inspecting worn preformed ropes, to determine their true condition.

A: We are wire rope & steel cable factory and manufacturer.Our main products are galvanized steel wire rope,plastic coated steel cable and iron steel strand,etc.

A: We are factory,so sufficient stock,diversified and professional export package and content methods let our wire ropes have shorter delivery time,more excellent service for pre-sale & on-sale,and make “LKS” wire ropes more suitable for long time transportation.

Generally it is 1-3 days if our wire ropes are in stock. Or it is 15-20 days if wire ropes you want to purchase are not in stock.It is according to your order quantity.

A: Yes. We are a professional manufacturer of steel cable & wire rope with 40+ years producing experience in China .We have always been cooperating with domestic and overseas customers and partners with the first- class quality and service to make great achievements. If this is your first time to contact us, please trust us, we’ll not let you down.

Stainless steel wire rope is made of stainless steel raw materials by drawing and twisting. It has excellent corrosion resistance, high temperature resistance and low temperature resistance. It is widely used in petrochemical industry, aviation, automobile, fishery, precision instruments, architectural decoration and other industries. After electrolytic polishing, the surface of stainless steel wire rope is brighter and the corrosion resistance is greatly enhanced. After low-temperature heat treatment, the wire rope can achieve higher strength. There are many classification methods of stainless steel wire rope, such as steel grade, construction/structure, laying/twist direction, surface, application and breaking load/strength. The most common used steel grade is SUS304/SS304 and SUS316/SS316.

The Stainless Steel Wire Rope of Shanghai BISCO International Corporation has the advantages of high dimensional accuracy, excellent surface quality, high brightness and stable mechanical properties. If there is a need of this product, please feel free to contact us, we will provide you with a quotation within 24 hours since receiving your inquiry.

6. Constructional Symbol: 1X3, 1X7, 1X19, 1X37, 3X7, 6X7+FC, 7X7, 6X19+FC, 7X19, 6X36SW+IWRC, 6X37+FC, 7X37, 8X19, 19X7 (Single Layer、Filler Wire、Seale、Warrington、Combination)…

Stainless steel wire rope has many characteristics such as excellent corrosion resistance, heat resistance, low temperature resistance, good fatigue resistance, high breaking force, long service life and durability. It is widely used in coal, petroleum, metallurgy, chemical industry, machinery, construction, ships, aviation, vehicles, bridges, cableways, control lines, electric power, rubber, military industry, medical treatment, water conservancy, fishery and light industry…etc. Stainless steel wire rope can be produced according to international standards such as ISO, BS, DIN, JIS, ABS and LR.

2. Stainless Steel Wire Rope for Elevator: it is used in elevator equipment carrying people and things in high-rise buildings. It is required to have a tight and soft structure and small structural elongation. It usually adopts 8-strand structure

3. Aviation Stainless Steel Wire Rope: it is used for aircraft aerial rope or operation aerial rope, which is required to have high fatigue performance and corrosion resistance

5. Steel Wire Rope for Aerial Cableway and Cable Car: it is used for air transportation track. With cable car as the means of transportation, the steel wire rope is required to have a large safety factor, corrosion resistance and smooth surface of stainless steel wire rope

6. Hoisting Stainless Steel Wire Rope: it is required that the wire rope has high tensile strength, good flexibility, no rotation, distortion fatigue resistance and no looseness

7. Stainless Steel Wire Rope for Fishery: it is used for trawl, fixed net, rolling net, etc. it works in rivers, lakes and seawater environment, and requires good corrosion resistance and flexibility