Nickel-chromium stainless steel having improved corrosion resist

Details Nickel-chromium stainless steel having improved corrosion resist Nickel-chromium stainless steel having improved corrosion resist

1988-02-18

1989-03-14

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 52, C22C 3840

Patent

active

048122874

ABSTRACT:
A nickel-chromium stainless steel having improved corrosion resistances and machinability, comprising less than 0.08 wt. % of C, less than 1.0 wt. % of Si, less than 0.7 wt. % of Mn, less than 0.04 wt. % of P, less than 0.005 wt. % of S, 8.0 to 12.0 wt. % of Ni, 17.0 to 20.0 wt. % of Cr, 0.40 to 0.80 wt. % of Mo, less than 0.3 wt. % of Cu, 0.03 to 0.5 wt. % of Sn and the balance of Fe.
In another embodiment of the present invention, 0.03 to 0.1 wt. % of Bi is added to the above-described composition to further improve the machinability of the stainless steel.

REFERENCES:
"Tetsu-to-Hagane (The Journal of the Iron & Steel Inst. of Japan)", 70, (1984), p. 741.
Preconference Text of "33rd Conference Concerning Corrosion and Auticorrosion", (held on Oct. 15-17, 1986 at Naha, Okinawa, Japan, pp. 119-122).

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