This standard stipulates the quality levels for imperfections of arc-welded joints in steel. These levels are related to products manufacturing quality, but not related to their applicability (see 3.1).
This standard is applicable to:
——According to welding method and their technology sorts specified in GB/T5185:
11 Metal arc welding without gas shield;
12 Submerged arc welding;
13 Gas shielded arc welding;
14 Non-gas shielded metal arc welding;
15 Plasma arc-welding;
——handiwork, mechanization, and automation welding method;
——all the welding positions;
——butt weld, fillet weld and branch joint;
——steels with thickness scope within 3-63 mm
This standard is not considering metallurgy factors, such as grain size and hardness.
