AS 3776:2015 Lifting components for Grade T(80) and V(100) chain slings
3.2.2 Manufacturing proof test
Components in their finished condition (except they may be painted or unpainted) shall, under the conditions specified in Appendices B and E, be subjected to a proof force at least equal to the manufacturing proof force specified in Tables A1 and A2 of Appendix A. After removal of the force, there shall be no visible defects, and the permanent set shall comply with Clause 2.4.1. For master links, mandrels may be used in lieu of pins as specified in Paragraph B1(b) for the manufacturing proof test only. Refer to Appendix B for test certificate requirements.
3.2.3 Non-destructive test
Where required by Appendix E, the forged surfaces of components, excluding load-bearing pins machined from drawn bar, shall, after heat treatment and de-scaling, be subjected to magnetic particle or dye penetrant testing in accordance with AS 1171 or AS 2062 (or international equivalent). Any such testing shall be undertaken by operators qualified in accordance with AS ISO 9712 (or international equivalent).
Indications greater than 2 mm in length shall not be permitted in areas of the component subjected to tensile stresses, in all foreseeable service conditions.
Where grinding is required to remove such indications then, after grinding, the component shall conform to the dimensions and tolerances specified by the manufacturer. A final examination shall show no indications greater than 2 mm in length.
NOTE: Care should be taken to ensure that the direction and roughness of grinding does not create starting points for fatigue failure and cause excessive heating, which may have a local effect on the heat-treated condition, or may cause cracks.
Load-bearing pins machined from drawn bar shall be tested (e.g. hardness testing or by using magnetic sorting techniques) to demonstrate that they have been satisfactorily heat- treated. They shall be examined following heat treatment and shall be free from visible defects.