Alloys or metallic compositions – Ferrous – Nine percent or more chromium containing
Patent
1986-09-29
1988-11-15
Yee, Deborah
Alloys or metallic compositions
Ferrous
Nine percent or more chromium containing
420584, C22C 3850
Patent
active
047848278
ABSTRACT:
A nonmagnetic steel for cryogenic use consisting essentially of, by weight, 23.0 to 30.0% of Ni, 13.0 to 16.0% of Cr, 3.0 to 7.4% of Mn, 1.5 to 3.0% of Ti, 1.0 to 3.0% of Mo, and the remainder being Fe, said steel containing not more than 0.02% of C, not more than 0.005% of P, not more than 0.005% of S, not more than 0.2% of Si and not more than 0.002% of B as trace elemental impurities. In a preferred embodiment, it further comprises not more than 0.5% by weight of Al and/or not more than 0.5% by weight of V. The steel has high strength and toughness in a cryogenic environment and excellent weldability.
REFERENCES:
patent: 3201233 (1962-06-01), Hull
Hiraga Keijiro
Ishikawa Keisuke
National Research Institute of Metals
Yee Deborah
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