Ming Yuan Metal Products (Shanghai) Co., Ltd.; the sales 15crmn; permeability steel; stainless steel; plastic mold steel; tungsten steel Hotline: 57888255; Fax: 57888225; phone: 15221352988; 15CrMn [1], is China's national standard of an alloy structural steel grades. Uniform digital code: A22152. Standard: GB / T 3077-1988 Chemical composition mass fraction (%): C C: 0.12 ~ 0.18 Si Si: 0.17 ~ 0.37 Manganese Mn: 1.10 ~ 1.40 S S: to allow the residual phosphorus content ≤ 0.035 P: ≤ 0.035 to allow the residual content Chromium Cr: 0.40 ~ 0.70 Ni: to allow the residual content ≤ 0.030 Copper Cu: ≤ 0.030 to allow the residual content