Tensile Strength Of Wire Rope

Rope diameter minimum breaking strength safe load weight in mm lb f kn lb f kn lb m ft kg m 1 4.

Tensile strength of wire rope.

Nominal strength in pounds. The wires of wire rope are made of high carbon steel. These tests are done by incrementally increasing the load that a rope is expected to carry until the rope breaks. The tensile strength of a material is the maximum amount of tensile stress that it can take before failure for example breaking.

There are 3 typical definitions of tensile strength. Recommended safe working load a 5 1 design factor lbs recommended safe working load a 5 1 design factor kg recommended safe working load a 3 5 1 design factor lbs. Rope strength is the approximate average for new rope tested under astm test method d 6268. Starlift xtra wire rope has one of the highest strength to diameter ratios on the market.

The mbf of starlift xtra is such. Nominal strength in short tons. All ropes of the same size grade and core offer somewhat similar minimum breaking force characteristics and weight per foot though they do differ depending on the construction type and materials used. Wire ropes are used to carry tensile loads and so the ultimate tensile strength of the rope is the most important property of a rope.

These wire ropes come in fiber core or iwrc variations with diameters ranging from to 1 1 3 and tensile strengths of 2 74 tons to 69 4 tons. 6x37 class wire ropes with 27 46 wires per strand. 6x19 class wire ropes with 15 26 wires per strand. A rope s tensile strength is the measure of a brand new rope s breaking point tested under strict laboratory controlled conditions.

Asme b30 5 mobile and locomotive cranes requires a design factor of 3 5 for 6 strand hoist ropes. These carbon steel wires come in various grades. We maintain a broad selection of wire ropes available for immediate delivery including. Wire ropes are usually made of extra improved plow steel eips or extra extra improved plow steel eeips which roughly equivalents to a wire tensile strength of 1960n mm and 2160n mm.

A simple wire rope strength chart can help you keep a close eye on wire rope strengths if find this to be an issue. To estimate the minimum tensile strength of a new rope reduce the approximate average by 20. Wire rope manufacturers calculate a theoretical minimum breaking strength of ropes based on the grade of the wires and the metallic cross sectional area of the rope this will be reported as the. The tensile strength is the load at which a new rope tested under laboratory conditions can be expected to break.

Nominal strength in metric tons.