The standard prescribes the technical requirements for welding rod arc welding, submerged arc welding and gas shielded arc welding of carbon steel, low alloy steel, high strength structure steel, stainless steel, stainless steel clad steel plate.
Note: The high strength structure steel hereafter referred to as high strength steel.
The standard is suitable for hydraulic steel structure weld; it is also suitable for the steel structure weld of miscellaneous mechanical products in water conservancy and hydroelectric projects.