GB/T 12470-2003 in English

《GB/T 12470-2003埋弧焊用低合金钢焊丝和焊剂》由TC55（全国焊接标准化技术委员会）归口，主管部门为国家标准化管理委员会。
本标准规定了埋弧焊用低合金钢焊丝和焊剂的型号分类、技术要求、试验方法及检验规则等内容。本标准适用于埋弧焊用低合金钢焊丝和焊剂。

1 Scope

This standard specifies such contents as type classification, technical requirements, test methods and inspection rules for low alloy steel electrodes and fluxes for submerged arc welding.
This standard is applicable to low alloy steel electrodes and fluxes for submerged arc welding.

2 Normative References

The following documents contain provisions which, through reference in this text, constitute provisions of this code. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated reference, the latest edition is applicable to this standard.
GB/T 700 "Carbon Structural Steels"
GB/T 1591 "High Strength Low Alloy Structural Steels" (neq ISO 4950)
GB/T 2650 "Impact Test Methods on Welded Joints"
GB/T 2652 "Tensile Test Methods on Weld and Deposited Metal"
GB/T 3323 "Methods for Radiographic Inspection and Classification of Radiographs for Fusion Welded Butt Joints in Steel"
GB/T 3429 "Wire Rod for Electrode"
GB/T 3965 "Methods for Determination of Diffusible Hydrogen in Deposited Metal"
GB/T 14957 "Steel Wires for Melt Welding"
JB/T 7948.8 "Methods for Chemical Analysis of Melted Welding Fluxes-The Molybdenumblue Photometric Method for Determlnation of Phosphorus Content"
JB/T 7948.11 "Methods for Chemical Analysis of Melted Welding Fluxes-The Direct Combustion-Iodimetric Method for Determination of Sulfur Content"

3 Type Classification

3.1 The type shall be classified according to mechanical performance of deposited metal combined by welding electrode-welding flux and heat treatment state.
3.2 The type preparation method of welding electrode-welding flux combination shall be F××××-H×××. Thereinto, letter "F" expresses welding flux; two digits behind "F" express minimum value of tensile strength of deposited metal for welding electrode-welding flux combination; the second letter expresses specimen state; "A" expresses welding state; "P" expresses post-weld heat treatment state; the third digit expresses minimum test temperature of deposited metal during impact absorbing energy no less than 27J; "-" back expresses welding electrode designation, and the welding electrode designation shall be in accordance with GB/T 14957 and GB/T 3429. If the diffusible hydrogen content in deposited metal needs to be marked, suffix "H×" may be adopted.

Foreword I
1 Scope
2 Normative References
3 Type Classification
4 Technical Requirements
5 Test Methods
6 Inspection Rules
7 Package, Mark and Quality Certificate
Appendix A (Informative) Standard Application Explanation
Appendix B (Informative) Contents of Quoted Relevant Standards