ASTM A931 The tension of wire ropes and strands

ASTM A931 The tension of wire ropes and strands

ASTM A931 covers the tension testing of wire ropes and strands at room temperature; it uses a poured socket with zinc, white metal, or thermoset resin during testing. The figures given in inch-pound units are to be taken as standard.

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    Scope:

    ASTM A931 is the most efficient testing method; it calculates the measured braking force, yield strength, elongation, and modulus of elasticity. Tension testing should be done on new wire ropes in most cases. Individual wire strengths can be reduced by abrasion and nicking when the wire rope is used in any application, reducing the wire rope’s strength. Damage to the outside wires reduces the maximum tensile strength achievable during tension testing.

    Test Procedure:

    ASTM A931 method is based on measuring the actual rope diameter and sample length then zeroing is completed. For this purpose, the maximum rate of loading should be 0.032 in. per minute. Reduction from a full reading occurs when the load is applied. When no more force can be used, the measured breaking force is attained.

    Specimen Size : 

    As per ASTM A931, the precise length of the test specimen on wire ropes larger than 3 in. (77 mm) must be at least 20 times the rope diameter.

    Data:

    In ASTM A931, the final tensile test results are measured in pounds.

    Conclusion:

    ASTM A931 is the most efficient testing method; it calculates the measured braking force, yield strength, elongation, and modulus of elasticity.

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