304N

304N不锈钢                                                                                                     名称：奥氏体型不锈钢 　　                                                                            标准：AISI、ASTM 　　                                                                                       型号：304N 　　                                                                                                  UNS编号：S30451 　　                                                                                         ●304N特性及应用： 　　                                                                                     304N，国标0Cr19Ni19N，是一种含氮的不锈钢，加氮是为了提高钢的强度。含有较高的镍，其加工硬化率低，304N不锈钢适用于对冷成型性要求高的地方。 　　                                                                  ●304N化学成分①： 　　                                                                                         碳 C：≤0.08 　　                                                                                             锰 Mn：≤2.00 　　                                                                                         硅 Si：≤0.75 　　                                                                                            铬 Cr：18.0~20.0 　　                                                                                         镍 Ni②：8.0~10.5 　　                                                                                     磷 P：≤0.045 　　                                                                                         硫 S：≤0.03 　　                                                                                           氮 N：0.10~0.16 　　                                                                                              　　                     ●力学性能：                                                                                                 抗拉强度 σb (MPa)：≥550                                                                                          条件屈服强度 σ0.2 (MPa)：≥275                                                                             伸长率 δ5 (%)：≥35                                                                                       断面收缩率 ψ (%)：≥50                                                                                     硬度：≤217HB;≤95HRB;≤220HV 　　                                                                            ●热处理规范及金相组织：热处理规范：固溶1010～1150℃快冷。                                                  金相组织：组织特征为奥氏体型。 　　                                                                              ●交货状态：一般以热处理状态交货，其热处理种类在合同中注明；未注明者，按不热处理状态交货。