Tensile Strength Of Wire Rope

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.

Tensile strength of wire rope.

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. These carbon steel wires come in various grades. Rope strength is the approximate average for new rope tested under astm test method d 6268. We maintain a broad selection of wire ropes available for immediate delivery including.

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. Rope diameter minimum breaking strength safe load weight in mm lb f kn lb f kn lb m ft kg m 1 4. Nominal strength in kg. Asme b30 5 mobile and locomotive cranes requires a design factor of 3 5 for 6 strand hoist ropes.

The tensile strength of a material is the maximum amount of tensile stress that it can take before failure for example breaking. The wires of wire rope are made of high carbon steel. 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. Nominal strength in metric tons.

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. A rope s tensile strength is the measure of a brand new rope s breaking point tested under strict laboratory controlled conditions. Nominal strength in short tons. Nominal strength in pounds.

The same standard requires a design factor of 5 0 for rotation resistant ropes. These tests are done by incrementally increasing the load that a rope is expected to carry until the rope breaks. A simple wire rope strength chart can help you keep a close eye on wire rope strengths if find this to be an issue. There are 3 typical definitions of tensile strength.

To estimate the minimum tensile strength of a new rope reduce the approximate average by 20. The mbf of starlift xtra is such. The tensile strength is the load at which a new rope tested under laboratory conditions can be expected to break. 6x19 class wire ropes with 15 26 wires per strand.

6x37 class wire ropes with 27 46 wires per strand.