Heat resisting low alloy steel

Details Heat resisting low alloy steel Heat resisting low alloy steel

C - Chemistry, Metallurgy

22

C

53/100, 75/134

C22C 38/28 (2006.01) C22C 38/22 (2006.01)

Patent

CA 1091063

HEAT RESISTING LOW ALLOY STEEL ABSTRACT OF THE DISCLOSURE A low alloy steel containing about 0.15% carbon; about 0.60% manganese; about 1.25% chromium; about 0.50% molybdenum; less than about 0.75% silicon; about 0.03% titanium; and the balance being essentially iron. The alloy also preferably contains about .004%-.006% boron. The alloy exhibits improved tensile strength at room temperature and improved stress rupture, creep strengths and improved rupture ductility, at 1000°F (538°C) and may be used for pressure vessels, piping, tubing and steam turbine casings. Additions of titanium and boron improve rupture ductility and reduce the susceptibility to intergranular fracture even in the presence of embrittling elements such as phosphorous, antimony and tin.

272692

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