ISO 12076 Steel Wire Ropes - Determination of Actual Modulus of Elasticity

Material Testing

ISO 12076 Steel Wire Ropes - Determination of Actual Modulus of Elasticity

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 12076 testing. This international standard specifies a method for determining, by experiment and calculation, the actual modulus of steel wire ropes in a given load range.

ISO 12076 Steel Wire Ropes - Determination of Actual Modulus of Elasticity

This international standard aims to provide manufacturers, suppliers and independent testing organizations with a uniform test method to determine the steel wire rope modulus. The module values ​​depend on the condition of the rope and therefore the actual condition under which the module will be determined needs to be known.

Three usual conditions apply:

  • Starter (as manufactured);
  • Partially bedded;
  • Last bed.

It is also important to know that steel wire ropes do not have a normal modulus of elasticity, but an "visible" modulus that can be determined between constant loads. This is called the ip module.

The gauge length of the extensometer, when used, must be at least equal to 60 x nominal rope diameter for ropes up to 15 mm in diameter. For rope sizes greater than 60 mm in diameter, the gauge length must be at least one string length or at least 900 mm, whichever is greater.

When using an extensometer to measure elongation, apply a force equivalent to 10% of the minimum breaking force or nominal breaking strength of the rope, insert and reset the extensometer, then measure the gauge length.

When the modulus is to be determined when the rope is in its initial state, increase the force to a value no greater than 30% of the minimum breaking force or nominal breaking strength of the rope. Note extensometer readings at forces equivalent to 10% and 30% of the rope's minimum breaking force, respectively.

EUROLAB assists manufacturers with ISO 12076 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.

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