Alloys or metallic compositions – Ferrous – Nine percent or more chromium containing
Patent
1985-08-15
1987-06-23
Andrews, Melvyn J.
Alloys or metallic compositions
Ferrous
Nine percent or more chromium containing
420 43, 420 44, 420 56, 420 59, 420 65, 420584, C22C 3858
Patent
active
046751564
ABSTRACT:
Disclosed is a structural austenitic stainless steel with superior proof stress and toughness at cryogenic temperatures. The steel has a composition essentially consisting of, by weight, not greater than 0.05% of carbon, 0.20 to 0.70% of nitrogen, not greater than 1.0% of silicon, not greater than 25% of manganese, 13 to 35% of chromium, 5 to 25% of nickel and the balance substantially iron. The chromium content and manganese content is selected to meet the condition of (Cr+0.9 Mn).gtoreq.20%. The index of cleanliness showing the amount of nonmetallic inclusions is not greater than 0.1%.
REFERENCES:
patent: 4172716 (1979-10-01), Abo et al.
Nakagawa Yasuhiro
Nakajima Hideo
Sakamoto Setsu
Shimamoto Susumu
Suzuki Katsumi
Andrews Melvyn J.
Japan Atomic Energy Research Institute
Nippon Steel Corporation
Yee Deborah
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