Heat resisting low alloy steel
CA 1091063 A · Owner: Westinghouse Electric Corporation · Inventors: Sherlock, Thomas P.; Viswanathan, Ramaswamy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 9, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.