90.60 Close of review Mar 5, 2026
ISO
ISO/TC 17/SC 4 Heat treatable and alloy steels
International Standard
77.080.20 Steels
Published
This document specifies an order for listing elements within the chemical composition of steels and most other iron-based alloys, excluding foundry irons.
NOTE This document has been developed and is used by ISO/TC 17/SC 4, but can also be used by other ISO/TC 17 subcommittees.
WITHDRAWN
ISO 6306:2019
PUBLISHED
ISO 6306:2020
90.60
Close of review
Mar 5, 2026