nominal strength of wire rope for sale

Galvanized wire rope is categorized by number of strands in its construction. We supply most of them but we concentrate on the two major categories of galvanized (and ungalvanized or bright) wire rope. These “classes” are referred to as 6x19 and 6x36. Within each category of galvanized wire rope there are different “constructions” illustrated in the tables below.

Wire rope, galvanized and ungalvanized is used for many kinds of projects and applications. No matter the application galvanized wire rope must be used properly to insure the safest working conditions. All of our galvanized wire rope is manufactured to meet or exceed Federal Specification RRW-410 and is mill certified.

All of these general purpose wire ropes are available in full reels, custom cut sizes or as part of a custom made wire rope sling. Contact us today for more information.

Galvanized wire rope also comes in different strength categories (IPS and EIPS) and different cores (FC or fiber core and IWRC or independent wire rope core). Relevant data for each is listed in the table below.

The standard Wire Rope for the Steel fabricating industry is 6 x 19 EIP/IWRC. In short this means the wire rope is made up of 6 independent wires. Each of these 6 wires has 19 individual strands.

The illustration below shows the configuration of standard Wire Rope in Classification 6 x 19 IWRC / EIP. IWRC refers to the inner core strand, which is independent of the 6 outer strands.

Application: For general purpose overhead lifting, suspension, skidding, and drag lines - Used as boom hoist ropes for cranes - Ideal for rigging, mining, construction, logging, oilfield, machine moving, and aerospace

Resilient multi-strand construction crane cable provides strength and performance while improving rope fatigue life. Smooth outside strand profile creates and improves rope wear resistance, reduces sheave and drum wear, and allows the rope to run efficiently on high speed hoisting lines.

Application: For general purpose overhead lifting, suspension, skidding, and drag lines - Used as boom hoist ropes for cranes - Ideal for rigging, mining, construction, logging, oilfield, machine moving, and aerospace

Resilient multi-strand construction crane cable provides strength and performance while improving rope fatigue life. Smooth outside strand profile creates and improves rope wear resistance, reduces sheave and drum wear, and allows the rope to run efficiently on high speed hoisting lines.

PREFORMING: A manufacturing process wherein the strands and their wires are permanently formed, during fabrication, the helical shape that they will ultimately assume in the finished wire rope. Proper preforming prevents the strand and wire from unlaying during normal use. The vast majority of wire ripe sold today is preformed.

FINISH: Wire rope is either sold as “bright” (or “black”), meaning uncoated, or galvanized for better corrosion resistance. “Drawn Galvanized” wire has the same strength as bright wire, but wire, “galvanized at finished size” is usually 10% lower in strength. Plastic coated wire rope is also available, usually galvanized or stainless steel cable. The most common plastic coverings are vinyl or nylon in either clear or white, although other materials and colors are available. These coating do not add strength to the wire rope itself.

LUBRICATION: During fabrication, wire ropes receive lubrication. The kind and amount depends on the rope’s size, type a use, if known. This in-process treatment will provide the finished wire rope with ample protection for a reasonable time if it is stored under proper conditions. But, when the wire rope is put into service, the initial lubrication will normally be less than needed for the full useful life of the wire rope. Because of this, periodic applications of a suitable wire rope lubricant are necessary.

ORDERING WIRE ROPE: Construction, lay, core, finish and other factors mentioned above impart greatly differing characteristics to different wire ropes. They must be understood and considered when selecting wire rope. There is no perfect wire rope for all applications; usually some less desirable properties are traded off for other, more desirable one. Refer to the Wire Rope Users Manual by the Wire Rope Technical Board for a better understanding of wire rope properties and consult professional help when in doubt.

If a supplier receives an order for 6 x 19 wire rope he may assume this to be a class reference and is, therefore, legally identified in furnishing any construction within this category.

Using the rope to its maximum fatigue life will cause the rope to deteriorate from the inside out. Sudden rope failures may be the result. For this reason we do not recommend this construction for tower cranes. There have been fatal and catastrophic accidents involving this rope construction because of undetected inner rope fatigue.

However, mobile and truck mounted cranes are operated on a much less severe duty cycle and it is not expected that 19x7 has to be replaced because of inner rope fatigue but because of other mechanical damages. Keep in mind that this statement covers normal mobile crane use. If you use a mobile crane like a production crane you WILL experience the above mentioned danger situations.

Type 302/304 stainless steel is the standard alloy for use in wire rope and cable. It has about the same strength as galvanized rope or cable but is much more corrosion resistant. It can be used in most industrial atmospheres and has acceptable corrosion resistance when used in marine- and salt water.

Type 316 stainless steel is the standard high corrosion resistant steel for rope and cable. It is resistant to many chemicals in the pulp and paper, photographic, food processing and textile industries. It has the best pitting resistance in marine and salt water and can be used in temperatures up to 480°C (900°F).

Bridon provides solutions to the most arduous and technically demanding challenges. Bridon products are used extensively in construction, mining, oil & gas extraction, telecommunications, and other specialized areas of engineering. For markets where there can be no compromise over product performance and integrity, choose Bridon.

Although Carl Stahl Sava Industries is known for producing the world’s tungsten, stainless steel and galvanized steel mechanical cable, exotic wire rope materials remain a less common, yet critical member of our family of cable offerings. Nitinol, titanium, Vitallium®, Inconel® and Molybdenum round out Sava’s compliment of specialty mechanical cable materials...