合金ASTMEN钢种牌号氮含量屈服强度抗拉强度延伸率GB%Rp0.2MPaRmMPaAs%316L316L1.44040.类乌齐904LNO89041.Cr20Ni25Mo4.5Cu0.LMN317LMN1.44390.类乌齐254SMOS.Cr20Ni18Mo6CuN0.SMOS.46520.