GB/T 31303-2014: Austenitic-Ferritic duplex stainless steel bars

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Scope

This Standard specifies the classification and code, size, shape, weight and allowable deviation,
technical requirements, test methods, inspection rules, packaging, marking, and quality
certificates of austenitic-ferritic duplex stainless steel bars.
This Standard applies to rolled or forged austenitic-ferritic duplex stainless steel bars with
dimensions (diameter, side length, thickness or distance of the opposite side) not exceeding
250mm. Austenitic-ferritic duplex stainless steel bars (hereinafter referred to as steel bars) with
dimensions (diameter, side length, thickness or distance of the opposite side) greater than
250mm can also be supplied upon negotiation between the supplier and the purchaser.

Basic Data

Standard ID	GB/T 31303-2014 (GB/T31303-2014)
Description (Translated English)	Austenitic-Ferritic duplex stainless steel bars
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H44
Classification of International Standard	77.140.20
Word Count Estimation	17,113
Date of Issue	12/5/2014
Date of Implementation	9/1/2015
Quoted Standard	GB/T 222; GB/T 223.3; GB/T 223.4; GB/T 223.5; GB/T 223.11; GB/T 223.16; GB/T 223.17; GB/T 223.18; GB/T 223.19; GB/T 223.23; GB/T 223.25; GB/T 223.26; GB/T 223.28; GB/T 223.36; GB/T 223.37; GB/T 223.43; GB/T 223.53; GB/T 223.58; GB/T 223.59; GB/T 223.60; G
Regulation (derived from)	Announcement of Newly Approved National Standards 2014 No. 27
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Standard specifies the austenite - ferrite content of duplex stainless steel rods classification and code, size, shape, weight and tolerances, technical requirements, test methods, inspection rules, packaging, marking and quality certificate. This St