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US 2018/0142332 A1Published application
Steel for small-calibre weapon
AssigneeAubert & Duval
InventorsJacques J. BELLUS, Dominique THIERREE
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Abstract
The present invention relates to a steel composition, to the process for manufacturing same, to the steel blank obtained having a hardness of between 46 and 48 HRC and a resilience KV at −40° C. of at least 40 joules, and to the use thereof for manufacturing a pressure appliance component.
Claims20
A steel composition essentially comprising:
- Carbon:
- 0.28-0.35;
- Manganese:
- 0.10-0.60;
- Silicon:
- 0.10-0.20;
- Chromium:
- 2.80-3.40;
- Molybdenum:
- 0.70-1.60;
- Vanadium:
- 0.20-0.50;
- Phosphorus:
- ≤0.005;
- Nickel:
- ≤0.10;
- Aluminium:
- ≤0.025;
- Copper:
- ≤0.10;
- Arsenic+Antimony+Tin:
- <100 ppm;
- Sulfur:
- <10 ppm;
- Iron:
- remainder;
- as weight percentages of the total composition, and also inevitable impurities.
24 more elements
Dependencies are inferred from the claim text.