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GB/T 45857-2025Tubular cored electrodes for electrogas welding (English PDF)

气电焊用药芯焊丝

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 1, 2025

Implementation date

November 1, 2025

Scope

GB/T 45857-2025 is the English-translated version of 气电焊用药芯焊丝.

GB/T 45857-2025 is the Chinese national standard covering flux-cored wire for the gas-shielded and self-shielded electrogas process, the vertical welding used on ship and tank plate — the classification by weld metal mechanical properties, welding position, shielding gas and chemical composition, the technical requirements from 430 MPa tensile strength upward, the test assemblies and the radiographic acceptance, the rounding rules, the inspection rules, and the technical conditions of supply. First edition, in force from 1 November 2025. Issued on 1 August 2025, it has been in force since 1 November 2025.

Document preview — GB/T 45857-2025

National Standard of the People's Republic of China

ICS: 25.160.20
Classification: J 33

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Model1
5 Technical Requirements3
6 Test Method4
7 Rules for Amendment7
8 Inspection Rules7
9 Technical conditions of supply7
Appendix A (Informative) Recommended test base materials8
References9

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is proposed and coordinated by the National Technical Committee for Welding Standardization (SAC/TC55).

This document was drafted by: Tianjin Jinqiao Welding Materials Group Co., Ltd., China Machinery Engineering Institute Group Harbin Welding Research Institute Co., Ltd.

Tianjin Daqiao Welding Materials Group Co., Ltd., Kunshan Jingqun Welding Materials Technology Co., Ltd., Sichuan Atlantic Welding Materials Co., Ltd., Hunan Valin Xiangtan Iron and Steel Co., Ltd., Harbin Well Welding Co., Ltd., China Machinery Engineering Institute Group Ningbo Intelligent Machine Tool Research Institute Co., Ltd.

Shandong Juli Welding Materials Co., Ltd., Zhejiang Shenjia Welding Materials Technology Co., Ltd., Shandong Iron and Steel Co., Ltd., Hefei General Machinery Research Institute Research Institute Co., Ltd., Sinopec Engineering Construction Co., Ltd., Hudong-Zhonghua Shipbuilding (Group) Co., Ltd., Shanghai Installation Engineering Group Co., Ltd.

Company, China Classification Society, Jinan Farina Welding Equipment Co., Ltd.

The main drafters of this document are: Xiao Huiying, Yang Zijia, Ma Yue, Tong Tianwang, Guo Qili, Zhou Wenhao, Chen Bo, Chu Jijun, Xin Guosong, Zheng Xiaodong, Ma Heng, Zhang Jian, Guo Xiao, Fang Wunong, Wang Jinguang, Liu Lei, Liu Chunhui, Li Changxin, Shi Baicheng, Zhang Guozhu, Wang Zhongxue, Li Hongbin, Shi Ji, Hao Runze, Xu Zhihui.

Flux-cored wire for gas-electric welding

1 Scope

This document specifies the types, technical requirements, test methods, rounding rules, inspection rules and supply technical conditions of flux-cored wire for gas-electric welding And other content.

This document is applicable to flux cores for gas shielded and self-shielded gas electric welding with a minimum tensile strength requirement of not less than 430 MPa for weld metal.

Welding wire (hereinafter referred to as "welding wire").

2 Normative references

GB/T 2650-2022

ISO 9016

GB/T 2652

ISO 5178

GB/T 3323.1

ISO 17636

GB/T 3375

GB/T 8170-2008

GB/T 16672

GB/T 16672-1996

ISO 6947

GB/T 25775

GB/T 25775-2010

ISO 544

GB/T 25778

GB/T 25778-2010

ISO 14344

GB/T 37910.1-2019

ISO 10675

GB/T 39255

GB/T 39255-2020

ISO 14175

3 Terms and Definitions

The terms and definitions defined in GB/T 3375 and the following apply to this document.

3.1 electrogas welding

The arc between the welding wire and the workpiece is continuously fed, and no external pressure is applied during the welding process. The weld is constrained by forming and cooling equipment. Forming welding method.

Note. Solid or flux-cored wire can be used, and gas shielding or self-shielding can be selected. Usually, according to the welding position, it is divided into gas-electric vertical welding and gas-electric horizontal welding.

4 Models

4.1 Model Classification

Welding wire models are divided according to mechanical properties, welding method, welding position, shielding gas type and chemical composition of weld metal.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 9016 · GB/T 2652 · ISO 5178 · GB/T 3323.1 · ISO 17636 · GB/T 16672 · GB/T 16672-1996 · ISO 6947 · GB/T 25775 · GB/T 25775-2010 · ISO 544 · GB/T 25778 · GB/T 25778-2010 · ISO 14344 · GB/T 37910.1-2019 · ISO 10675 · GB/T 39255 · GB/T 39255-2020 · ISO 14175

Editions of GB/T 45857

Edition	Title	Revision	Status
GB/T 45857-2025	Tubular cored electrodes for electrogas welding	current edition	Current

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