批发SUP10钢材，SUP12弹簧钢【直条】 批发SUP10钢材，SUP12弹簧钢【直条】==============.处理前硬度 143HBS，处理后硬度 131HBS。 中国GB/JB标号:20日本JIS标号:S20C/S22C美国AISI标号:1020德国DIN钢号标号:CK22/C22德国DIN材料标号:1．0402台湾CNS标号:S20C英国BS标号:IC22法国AFNOR标号:CC20意大利UNI标号:C20/C21化学成分：C碳:0．18～0．23Si硅:0．15～0．35Mn锰:0．30～0．60S硫: 0．030P磷: 0．030Cr铬: 0．25Ni镍: 0．20Cu铜: 0．30 ==================================== 冷镦压用钢：ML04AlML08AlML10AlML15AlML15ML20AlML20ML18MnML22MnML20CrML25ML30ML40ML45ML15MnML25MnML30MnML35MnML37CrML40CrML30CrMoML35CrMoML42CrMoML20BML28BML35BML15MnBML20MnBML35MnBML37CrBML20MnTiBML15MnVB 弹簧钢:65Mn55SiMnVB55Si2Mn55Si2MnB60Si2Mn60Si2MnA60Si2CrA60Si2CrVA55SiCrA55CrMnA60CrMnA50CrVA60CrMnBA30W4Cr2VAC67SC75SC85SC100S38Si638Si746Si751Si756Si765Si771Si760SiMn551MnV754SiCr667SiCr556SiCr761SiCr752MnCrB3