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.
GB/T 12470-2003 The following standards are cited：
