GB/T 1299-2025: Tool and mould steels

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Scope

This document specifies the classification and designation of tool and mould steels,
ordering details, manufacturing process, technical requirements, test methods,
inspection rules, packaging, marks, and quality certificate.
This document applies to tool and mould steel hot-rolled, forged, cold-drawn, bright,
and machined steel bars and hot-rolled wire rods (hereinafter collectively referred to as
steel bars), as well as single-rolled cold-rolled steel plates with a nominal thickness of
no more than 4 mm and single-rolled hot-rolled steel plates with a nominal thickness of
no more than 10 mm (hereinafter referred to as steel plates). The chemical composition
also applies to steel ingots, billets, and their products.
NOTE. In this document, steel bars and steel plates are collectively referred to as steel products.

Basic Data

Standard ID	GB/T 1299-2025 (GB/T1299-2025)
Description (Translated English)	Tool and mould steels
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H40
Classification of International Standard	77.140.35
Word Count Estimation	70,761
Date of Issue	2025-10-31
Date of Implementation	2026-05-01
Older Standard (superseded by this standard)	GB/T 1299-2014, GB/T 33811-2017
Issuing agency(ies)	State Administration for Market Regulation and Standardization Administration of China