GB/T 222-2025: Steels and alloys - Permissible deviations of product analyzed chemical composition

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Scope

This document specifies the permissible deviations of the chemical composition of
products (including billets) for non-alloy steel, low-alloy steel, alloy steel, stainless
steel, heat-resistant steel, wrought corrosion-resistant alloys and high-temperature
alloys from the specified limits of smelting chemical composition. It provides
definitions for related terms.
This document applies to the permissible deviations of product analyzed chemical
composition as specified in product standards and technical agreements for steel and
alloys.

Basic Data

Standard ID	GB/T 222-2025 (GB/T222-2025)
Description (Translated English)	Steels and alloys - Permissible deviations of product analyzed chemical composition
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H40
Classification of International Standard	77.080.20
Word Count Estimation	18,131
Date of Issue	2025-08-29
Date of Implementation	2025-12-01
Older Standard (superseded by this standard)	GB/T 222-2006, GB/T 25829-2010
Issuing agency(ies)	State Administration for Market Regulation; Standardization Administration of China