40crni2mo的精选

40CrNi2MoA属于合金结构钢，执行标准：GB/T3077-2017碳Carbon0.38-0.43%铬Chromium0.7-0.9%铁Iron余量锰Manganese0.6-0.8%钼Molybdenum0.2-0.3%镍Nickel1.65-2%磷Phosphorus0.035%max矽Silicon0.15-0.3%合金结构钢（struct...