FIELD: metallurgy, in particular chromium-nickel-manganese-copper austenite stainless steel.
SUBSTANCE: claimed steel contains (mass %) (a) C 0.03-0.12; (b) Si 0.2-1.0; (c) Mn 7.5-10.5; (d) Cr 14.0-16.0; (e) Ni 1.0-5.0; (f) N 0.04-0.25; (g) Cu 1.0-3.5; (h) Mo as trace element; and balance: Fe and inevitable impurities. Austenite stainless steel contains less, than 8.5 vol.% of δ-ferrite, determined as δ-ferrite = 6.77[(d)+(h)+1.5(b)]-4.85[(e)+30(a)+30(f)+0.5(c)+0.3(g)]-52.75.
EFFECT: austenite stainless steel of improved mechanical strength, high corrosion resistance, in particular in salt mist, and high phase stability during hot and cold treatment.
4 cl, 1 dwg, 4 tbl, 22 ex
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