No. Grade drug skin type GB / T 5117-1995 AWS model ISO model and a brief 120 CHE420T special type E4300 2560-B-E43 19 A high temperature and high voltage power station pipe welding 121 CHE421 high potassium titanium type E4313 E6013 2560-B-E43 13 A low-carbon steel plate welded structure 122 CHE421D high potassium titanium type E4313 E6013 2560-B-E43 13 A carbon steel welded base with 123 CHE422 titanium calcium type E4303 2560-B-E43 03 A steel structural welding iron 124 CHE424 type E4320 E6020 2560-B-E43 20 A low-carbon steel welding 125 CHE424Fe16 iron oxide type E4327 E6027 2560-B-E43 27 A high-efficiency low-carbon steel welding 126 CHE425 high cellulose potassium type E4311 E6011 2560-B -E43 11 stand A low-carbon steel for welding backing down welding 127 CHE425G a high cellulose sodium type E4310 E6010 2560-B-E43 10 A for low-carbon steel, the filler passes and capping 128 CHE426 Low potassium type E4316 2560-B-E43 16 A for low carbon steel and low alloy steel 129 CHE427 corresponding strength low hydrogen sodium type E4315 2560-B-E43 15 A for low carbon steel and the corresponding strength low alloy steel welding 130 CHE427T low hydrogen sodium type E4315 2560-B-E43 15 A for low carbon steel and low-alloy steel pipe corresponding strength vertical down welding 131 CHE427SH low hydrogen sodium type DGS K 101.11-2007 2560-B-E43 15 A for the Low carbon steel welding strength requirements and low alloy steels. As Q245 (HIC) and the like. 132 CHE427SHA low hydrogen sodium type DGS K 101.31-2009 2560-B-E43 15 A low intensity requirement for welding hydrogen resistant steel and low alloy steel. Such as 20 # (HIC) and A106B (HIC) and the like. 133 CHE427CrCu welding important structures of low hydrogen sodium type DGS K 101.41-2009 carbon steel, low alloy steel and weathering steel, such as steel, 134 CHE427CrCuSb Q235NH low hydrogen sodium type DGS K 101.51-2010 for welding acid-resistant steel. As PNS JNS acid-resistant steel and acid-resistant steel. 135 CHE501Fe iron titanium E5014 E7014 2560-B-E49 14 A for welding of mild and low alloy steel 136 CHE502 titanium calcium type E5003 2560-B-E49 03-1 A for Q345 low-alloy steel structures 137 CHE505 high cellulose potassium type E5011 E7011-G 2560-B-E49 11-1 A vertical down welding of carbon steel and the corresponding strength low alloy steel 138 CHE505G a high cellulose sodium type E5010 E7010-G 2560-B-E49 10 backing weld -1 A steel structure, filler passes and capping 139 CHE506 low hydrogen potassium type E5016 E7016 2560-B-E49 16-1 A welding carbon steel and low alloy steel 140 CHE507 more important low hydrogen sodium E5015 E7015 2560-B-E49 15-1 A welding carbon steel and low-alloy steel 16Mn, and other important 141 CHE507T low hydrogen sodium type E5015 E7015 2560-B-E49 15-1 A suitable welding pipe down and down fillet welding and downlink high-efficiency low-alloy steel butt weld groove 142 CHE507Fe16 iron powder low hydrogen type E5028 E7028 2560-B-E49 28-1 A steel and the corresponding strength of the weld 143 CHE508 iron powder low hydrogen potassium type E5018 E7018 2560-B-E49 18-1 low alloy steel and high efficiency A 144 CHE508-1 corresponding strength of welded iron powder low hydrogen potassium type E5018-1 E7018-1 2560-B-E49 18-1 A welding of carbon steel and the corresponding strength of the important The low alloy steel structure