초록

A two-phase stainless steel containing 10 -75% ferrite and an effective sulfur content controlled to 0.003% by weight or lower and an effective phosphorous content controlled to 0.01% by weight or lower.

대표청구항 ▼

A two-phase stainless steel composed of 10 to 75% of a ferrite phase and the balance an austenite phase, said steel consisting essentially of: C =0.005 to 0.2% Si =0.01 to 3.0% Mn ≤15% P ≤0.08% S ≤0.03% Cr =15 to 35% Ni =10 to 30% N =0.01 to 0.4% Al =0.06 to 6.0% and at least one element selected fr

A two-phase stainless steel composed of 10 to 75% of a ferrite phase and the balance an austenite phase, said steel consisting essentially of: C =0.005 to 0.2% Si =0.01 to 3.0% Mn ≤15% P ≤0.08% S ≤0.03% Cr =15 to 35% Ni =10 to 30% N =0.01 to 0.4% Al =0.06 to 6.0% and at least one element selected from the group consisting of Y =0.01 to 0.09% Ce =0.001 to 0.2% and Mg =0.001 to 0.09%, and further comprising at least one of Nb ≤2.0%, Mo ≤6.0%, Ti ≤1.0% and Cu ≤3.0% with the balance Fe and unavoidable impurities and having a reduction of area of between 52% and 63% at 1,000°C.