| 摘要 |
A low nickel content austenitic stainless steel has the composition (by wt.) less than 0.1% C, 0.1-1% (exclusive) Si, 5-9% (exclusive) Mn, 0.1-2% (exclusive) Ni, 13-19% (exclusive) Cr, 1-4% (exclusive) Cu, 0.1-0.40% (exclusive) N, 5 x 10<-4>-50 x 10<-4>% (exclusive) B, less than 0.05% P and less than 0.01% S. Preferably, both the ferrite index (IF1) and the martensite stability index (IS) are less than 20, where IF1 = 0.034 x x<2> + 0.284 x x - 0.347 and IS = 0.0267 x y<2> + 0.4332 x y - 3.1459, in which x = 6.903 x Ä-6.998 + Cr% - 0.972 x (Ni% + 20.04C% + 21.31N% + 0.46Cu% + 0.08Mn%)Ü and y = 250.4 - 205.4C% - 101.4N% - 7.6Mn% - 12.1Ni% - 6.1Cr% - 13.3Cu%.
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