GB/T 11251-2025: Alloy structural steel plate, sheet and strip

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Scope

This document specifies the ordering details, manufacturing process, technical
requirements, test methods, inspection rules, packaging, marking, and quality
certificates for alloy structural steel plate/sheet and strip.
This document applies to single-sheet hot-rolled steel plate/sheet with a nominal
thickness of 3.0 mm ~ 250 mm (hereinafter referred to as single-rolled steel plate/sheet);
hot-continuously-rolled steel plate/sheet and strip with a nominal thickness not greater
than 25.4 mm, including hot-continuously-rolled wide steel strip, sheared steel
plate/sheet, and slit steel strip with a nominal width not less than 600 mm, and hot-
continuously-rolled narrow steel strip and sheared steel plate/sheet with a nominal
width less than 600 mm (hereinafter referred to as steel plate/sheet and strip).
NOTE. Single-rolled steel plate/sheet, steel plate/sheet and strip are collectively referred to as steel
products in this document.

Basic Data

Standard ID	GB/T 11251-2025 (GB/T11251-2025)
Description (Translated English)	Alloy structural steel plate, sheet and strip
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H46
Classification of International Standard	77.140.50
Word Count Estimation	14,120
Date of Issue	2025-10-31
Date of Implementation	2026-05-01
Older Standard (superseded by this standard)	GB/T 11251-2020, GB/T 37601-2019
Issuing agency(ies)	State Administration for Market Regulation and Standardization Administration of China