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US 2023/0323522 A1Published application
Super cqht high temperature alloy-resistant aluminized steel with moderate formability
AssigneeCleveland-Cliffs Steel Properties Inc.
InventorsJames F. EVANS, Jerry Lee ARNOLD
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Abstract
A coated steel includes a steel strip and an aluminum-based coating. The steel strip includes a free nitrogen concentration of greater than 40 parts per million (PPM). The aluminum-based coating is disposed on at least one surface of the steel strip.
Claims20
A coated steel sheet, comprising:
- (a) a steel strip, the steel strip including a free nitrogen concentration of greater than 40 ppm;
- and
- (b) an aluminum-based coating, the aluminum-based coating being disposed on at least one surface of the steel strip.
A method for coating a steel, the method comprising:
- (a) preparing a steel strip with a free nitrogen concentration of 40 ppm or more;
- (b) coating the steel strip with an aluminum-based coating;
- and
- (c) after the step of coating, coiling the coated steel strip without subjecting the coated steel strip to annealing.
1 more element
The method of claim 12, the step of coating the steel strip including coating the steel strip with a Type-2 aluminized coating.
A coated steel, comprising:
- a steel strip including, in percent weight:
- carbon:
- less than 0.020%;
- manganese:
- less than 0.40%;
- aluminum:
- less than 0.015%;
- nitrogen:
- greater than 0.008%;
- and
- the balance including iron and impurities, and
- wherein the steel strip having a free nitrogen concentration of greater than 90 ppm
9 more elements
Dependencies are inferred from the claim text.