High strength stainless steel

Details High strength stainless steel High strength stainless steel

1988-09-12

1989-07-18

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 60, C22C 3842

Patent

active

048491667

ABSTRACT:
There is disclosed a high strength stainless steel consisting essentially of not more than 0.10% C., more than 1.5% and not more than 2.95% Si, less than 0.5% Mn, not less than 4.0% and not more than 8.0% Ni, not less than 12.0% and not more than 18.0% Cr, not less than 0.5% and not more than 3.5% Cu, not more than 0.15% N and not more than 0.004% S, wherein the total content of C and N is not less than 0.10%, the balance is Fe and incidental impurities, said steel satisfies the relations A'>42, and 35<Md(N)<95, wherein A'=17.times.(C % / Ti %)+0.70.times.(Mn %)+1 x-(Ni %)+0.60.times.(Cr %)+0.76 (Cu %)-0.063.times.(Al %) and Md(N)=580-520 (C %)-2 (Si %)-16 (Mn %)-16 (Cr %)-23 (Ni %)-300 (N %)-26 (Cu %). This steel is inexpensive and can be provided with high strength and high ductility by cold working and aging.

REFERENCES:
patent: 3785787 (1974-01-01), Yokota et al.
patent: 4378246 (1983-03-01), Hoshino et al.

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