This Standard specifies the requirements for lifting chains, Grade 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 and comply with the general conditions of acceptance of GB/T 20946.
The range of sizes covered by this Standard is from 5 to 45 mm. The annex gives a range of temporary additional sizes 6 to 46 mm.
