C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
75/120, 148/31
C22C 38/44 (2006.01) C22C 38/22 (2006.01) C22C 38/26 (2006.01) C22C 38/28 (2006.01)
Patent
CA 1184403
LOW INTERSTITIAL 29% CHROMIUM - 4% MOLYBDENUM WELDABLE FERRITIC STAINLESS STEEL CONTAINING COLUMBIUM OR TITANIUM ABSTRACT OF THE DISCLOSURE A low interstitial, corrosion resistant, weldable ferritic stainless steel has an addition of between 0.05% and 0.50% columbium or titanium to give the steel improved toughness when the maximum achievable cooling rate is limited. The steel consists essentially of the following composition by weight percent: between 25.0% and 35.0% chromium, between 3.6% and 5.6% molybdenum, between 0.05% and 0.50% of at least one element from the group consisting of columbium and titanium, less than 3.0% nickel, less than 2.0% manganese, less than 2.0% silicon, less than 0.5% aluminum, less than 0.5% copper, less than 0.050% phosphorus, less than 0.050% sulfur, less than 0.01% carbon, less than 0.02% nitrogen, the carbon plus nitrogen content being less than 0.025% and the balance iron.
391706
Deverell Harry E.
Mccunn Thomas H.
Allegheny Ludlum Corporation
Riches Mckenzie & Herbert Llp
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