Alloys or metallic compositions – Ferrous – Chromium containing – but less than 9 percent
Patent
1986-03-31
1989-04-11
Yee, Deborah
Alloys or metallic compositions
Ferrous
Chromium containing, but less than 9 percent
420106, 420109, C22C 3844
Patent
active
048204862
ABSTRACT:
The present invention relates to low alloy steel and specifically to nickel-chrome-molybdenum steel.
A low alloy steel having excellent stress corrosion cracking resistance containing C:.ltoreq.0.40%, Si:.ltoreq.0.15%, Mn:.ltoreq.0.20%, P:.ltoreq.0.010%, S:.ltoreq.0.030%, Ni: 0.50 to 4.00%, Cr: 0.50 to 2.50%, Mo: 0.25 to 4.00% and V:.ltoreq.0.30%, said Si, Mn and P being fulfilled with relationship of Si+Mn+20P.ltoreq.0.30%, the remainder comprising Fe and unavoidable impurities, the prior austenite crystal grain size being in excess of 4 of ASTM crystal grain size number.
REFERENCES:
patent: 3266947 (1966-08-01), Steiner
patent: 3438822 (1969-04-01), Allen
patent: 4185998 (1980-01-01), Reisdorf
patent: 4214950 (1980-07-01), Balandin et al.
patent: 4322256 (1982-03-01), Henning
patent: 4741880 (1988-05-01), Lang et al.
Fujiwara Kazuo
Miyakawa Mutsuhiro
Morita Kikuo
Nakayama Takenori
Shimogori Kazutoshi
Kabushiki Kaisha Kobe Seiko Sho
Yee Deborah
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