ISO 4948-1

Steels — Classification — Part 1: Classification of steels based on chemical composition

General information

60.00   Standard under publication   Oct 22, 2026

ISO

ISO/TC 17 Steel

International Standard

77.080.20   Steels

Scope

This part of ISO 4948 defines steel and gives 2.0 % carbon as the usual dividing line between steel and cast iron. The classification based on the specified values for the ladle analyses of the elements given in the table.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 4948-1:1982

NOW

IN_DEVELOPMENT
ISO 4948-1
60.00 Standard under publication
Oct 22, 2026