... standards, the main chemical composition (%) c0.06-0.15, Mn1.40-1.85, si0.80-1.15, p acuities were 0 ... standards, the main chemical composition (%) c0.06-0.15, Mn1.40-1.85, si0.80-1.15, p acuities were 0 ... alloy steel welding key structure. Such as container, vehicles, construction machinery gas protection semi-automatic and automatic welding. At the same time the company ...