Rust and heat resisting ferrous base alloys containing chromium and aluminum
Abstract
Abstract RUST AND HEAT RESISTING FERROUS BASE ALLOYS COMPRISING BY WEIGHT BETWEEN ABOUT 3% AND 10% ALUMINUM, BETWEEN ABOUT 4% AND 8% CHROMIUM, ABOUT 0.5% COPPER, LESS THAN 0.05% CARBON, AND THE BALANCE SUBSTANTIALLY IRON. THE ALUMINUM AND CHROMIUM TOGETHER TOTAL AT LEAST 9%, WITH EITHER THE CHROMIUM OR THE ALUMINUM BEING AT LEAST 6% AND THE DIFFERENCE BETWEEN THE CHROMIUM AND ALUMINUM BEING LESS THAN 6%, OF THE WEIGHT OF THE ALLOY. THE ALLOYS ACCORDING TO THIS INVENTION MAY BE RENDERED HEAT TREATABLE BY PRECIPITATION HARDENING BY ADDING BETWEEN ABOUT 0.5% AND 2.0% BY WEIGHT OF TITANIUM TO THE ALLOY TO PRODUCE RUST AND CORROSION RESISTANT ALLOYS OF HIGH TENSILE STRENGTH WITH GOOD DUCTILITY.
Inventors
- 👤 Hugh S Cooper
Bibliographic Details
Claims Analysis
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| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
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