GB/T 18669-2025: Steel for ship anchor chain and offshore mooring chain cables

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Scope

This document specifies the grades and codes, ordering contents, dimensions,
appearance, weight, technical requirements, test methods, inspection rules, packaging,
marking and quality certificates for steel for ship anchor chain (grades M2, M3, M4)
and steel for offshore mooring chain cables (grades R3, R3S, R4, R4S, R5, R6).
This document is applicable to hot-rolled steel for ship anchor chain with a nominal
diameter of 13 mm~225 mm and hot-rolled steel for offshore mooring chain cables with
a nominal diameter of 30 mm~250 mm for floating production systems, semi-
submersible drilling platforms, single-point mooring chain structures, floating
production storage and offloading vessels and other marine development facilities
(hereinafter referred to as round steel).

Basic Data

Standard ID	GB/T 18669-2025 (GB/T18669-2025)
Description (Translated English)	Steel for ship anchor chain and offshore mooring chain cables
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H44
Classification of International Standard	77.140.70
Word Count Estimation	16,111
Date of Issue	2025-06-30
Date of Implementation	2026-01-01
Older Standard (superseded by this standard)	GB/T 32969-2016, GB/T 18669-2012
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration