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日本日新制钢公司开发了牌号为NSS304ES的极软质奥氏体系不锈钢,该钢的化学成分为:17Cr-8Ni,较低C、N含量,添加1.6％Mn、3％Cu,其特点是:1)属极软性材质,降低了加工硬化,旋压成形加工性能优异。2)不易产生季节性开裂,所以多级深冲加工后的退火可以省略或者减少退火的次数。3)冲裁孔穴的扩孔性能优异。 NSS304ES钢的机械性能如下:硬度:111HV,屈服强度:178N/mm~2;抗张强度:
Japan’s Nisshin Steel has developed a very soft austenitic stainless steel grade NSS304ES chemical composition: 17Cr-8Ni, low C, N content, adding 1.6% Mn, 3% Cu, which is characterized by : 1) is a very soft material, reducing work hardening, spinning forming excellent processing performance. 2) is not easy to produce seasonal cracking, so multi-level deep drawing after annealing can be omitted or reduce the number of annealing. 3) Punching holes have excellent hole expansion performance. NSS304ES steel mechanical properties are as follows: Hardness: 111HV, yield strength: 178N / mm ~ 2; Tensile strength: