Low Ni content austenitic stainless steel with high strength/ductility properties

An austenitic stainless steel alloy composition having a reduced Ni content is provided. These alloys combined with processes including a martensitic thermomechanical treatment with a thickness reduction, preferably greater than 65%, provide a new generation of advanced high strength steel having a combination of tensile strength and total elongation in the range of 1000 MPa/35-55% to 1350 MPa/25-45%, with good formability and weldability, useful in the manufacture of many products, particularly in the automotive industry. 提供了具有降低的Ni含量的奥氏体不锈钢合金组合物。这些合金与包括使厚度减少优选大于65％的马氏体热机械处理的工艺相结合，提供了新一代先进高强度钢，其拉伸强度和总伸长率的组合在1000MPa/35-55％至1350MPa/25-45％的范围内，且有良好的成形性和焊接性能，可用于制造许多产品，特别是在汽车行业中。