规定了起重机、链式吊索和一般起重用途的未校准M（4）级起重链的要求。这些都是电焊圆钢短链，完全热处理和测试符合ISO 1834。涵盖的尺寸范围为5至45毫米。附件给出了6至46 mm的临时附加尺寸范围。

Specifies the requirements for lifting chains, grade M (4), non-calibrated, for use on cranes, in chain slings and for general lifting purposes. These are electrically welded round steel short link chains, fully heat treated and tested complying with ISO 1834. The range of sizes covered is from 5 to 45 mm. The annex gives a range of temporary additional sizes 6 to 46 mm.