2205材质、40cr材质、45#钢材加工成主轴,哪种强度更高40cr和45#钢做...答:Cr=22.0~23.0,Ni=4.50~6.50, Mo=3.00~3.50, C≤0.030, N=0.14~0.20, Mn≤2.00, Si≤1.00, P≤0.030, S≤0.020,Fe=余量 六、相关技术标准 ASTM A790 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe ASTM A790 铁素体/奥氏...