Under publication
ISO 4948-1
Steels — Classification — Part 1: Classification of steels based on chemical composition
Reference number
ISO 4948-1
Edition 2
2026-11
Under publication
ISO 4948-1
91226
Under publication (Edition 2, 2026)
Final production steps (up to seven weeks).
Will replace ISO 4948-1:1982

Abstract

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.

General information

  •  : Under development
     : 2026-11
    : International Standard under publication [60.00]
  •  : 2
  • ISO/TC 17
    77.080.20 
  • RSS updates

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