update:

better quality:

ISO 1834:1999 Short link chain for lifting purposes -- General conditions of acceptance
ISO 1835:1980 Short link chain for lifting purposes -- Grade M (4)* non-calibrated* for chain slings etc.
ISO 3056:1986 Non-calibrated round steel link lifting chain and chain slings -- Use and maintenance
ISO 4778:1981 Chain slings of welded construction -- Grades M (4)* S (6) and T (8)
ISO 7592:1983 Calibrated round steel link lifting chains -- Guidelines to proper use and maintenance
ISO 7593:1986 Chain slings assembled by methods other than welding -- Grade T(8)
ISO 4779:1986 Forged steel lifting hooks with point and eye for use with steel chains of grade M(4)


added missing:

ISO/TR 21704:2017 Toughness of round steel link chains -- Test with sub-size specimens
ISO/TR 23602:2005 Toughness of chain steels
ISO 2308:1972 Hooks for lifting freight containers of up to 30 tonnes capacity -- Basic requirements


so* this one ISO's sector completed too

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