Metal treatment – Stock – Ferrous
Patent
1988-12-15
1990-10-23
Roy, Upendra
Metal treatment
Stock
Ferrous
22826315, 420 42, 420 62, 420 70, C22C 3826, C22C 3828
Patent
active
049649264
ABSTRACT:
A weldable ferritic stainless steel and a method for producing the same is provided wherein the steel consists essentially of up to 0.03 carbon, up to 0.05 nitrogen, 10 to 25 chromium, up to 1.0 manganese, up to 0.5 nickel, up to 1.0 silicon, 0.03 to 0.35 titanium, 0.10 to 1.0 niobium, optionally up to 1.2 aluminum, the balance essentially iron, the amounts of titanium and niobium varying inversely and not more than necessary to satisfy specific thermodynamic equations and the method includes casting the steel into ingots or slabs without the precipitation of detrimental intermetallic or nonmetallic titanium compounds so that the hot-rolled band gauge, without grinding, can be cold rolled to final gauge sheet or strip free of open surface defects.
REFERENCES:
patent: 3759705 (1973-09-01), Chalk
patent: 4078919 (1978-03-01), Kado et al.
patent: 4261739 (1981-04-01), Douthett et al.
patent: 4417921 (1983-11-01), Maurer
patent: 4608099 (1986-08-01), Davison et al.
patent: 4640722 (1987-02-01), Gorman
Allegheny Ludlum Corporation
Roy Upendra
Viccaro Patrick J.
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