CO2气体保护焊丝：焊条牌号符合国标GB/T8110-1995相当国外标准σbσsδ5Akv主要化学成分美：AWS日：JISMPaMPa%°CJCSiMnCrNiSPCuMG49-1ER49-1≥490≥372≥20室温,≥47≤0.110.65-0.951.80-2.10≤0.20≤0.30≤0.030≤0.030≤0.50MG49-Ni≥490≥372≥20-20,≥27≤0.100.50-0.801.30-1.600.20-0.550.30-0.60≤0.030≤0.0300.20-0.50MG49-GER49-GER70S-GYGW-11≥490≥390≥220,≥27≤0.150.55-1.101.40-1.90--≤0.030≤0.030-MG50-3MG50-3ER70S-3≥500≥420≥22-18,≥270.06-0.150.45-0.750.90-1.40--≤0.035≤0.025≤0.50MG50-4MG50-4ER70S-4≥500≥420≥22-0.07-0.150.65-0.851.00-1.50--≤0.035≤0.025≤0.50MG50-6MG50-6ER70S-6≥500≥420≥22-30,≥270.06-0.150.80-1.151.40-1.85--≤0.035≤0.025≤0.50MG50-GMG50-GER70S-GYGW-16≥490≥345≥22-30,≥27≤0.150.40-1.000.85-1.60--≤0.030≤0.030)