Type model Gb chemical composition(%)mechanical properties Cmnsispotherr el /r p 0.2 mpar m Mpaa %a kv 421e43130.100.32/0.550.300.0350.04-330420170 íp c Th422e43030.100.32/0.550.250.0350.040-330420220 íp c Th422gme43030.100.32/0.550.250.0350.040-330420220 íp c Th423e43010.100.32/0.550.300.0350.040-33042022-20 íp c Th426e43160.101.250.900.0350.040-33042022-30 íp c Th502e50030.100.50/1.250.300.0350.040-400490200 íp c Th506e50160.101.600.750.0350.040-40049022-30 íp c Th506de50160.101.600.750.0350.040-40049022-30 íp c Th506fee50180.101.600.750.0350.040-40049022-30 íp c Th507e50150.101.600.750.0350.040-40049022-30 íp c Typemodel gb(aws)usage 421e4313for welding low carbon steel light-gauge sheet structures . Th422e4303for welding key structures of low carbon steel as well as low-alloy steel with same strength. Th422gme4303suitable for cosmetic welding of key structures of low carbon steel ad low-alloy steel Th423e4301for welding low carbon steel structures. Th426e4316for welding key structures of low carbon steel and low-alloy steel with same strength Th502e5003for welding general structures of 16mn and low-alloy steel with same strength Th506e5016for welding medium carbon steel structures and some key structures of low-alloy steel like 16mn and etc. Th506de5016for kacking welding and back sealing weiding is not necessary. Th506fee5018high efficient welding electrodes for welding low-alloy steel structures. Th507e5015suitable for welding key structures for medium carbon steel and 16mn low-alloy steel structures.