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US 10,724,124 B2Granted
Steel for small-caliber weapon
AssigneeAubert & Duval
InventorsJacques J. Bellus, Dominique Thierree
Life of this patent
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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.
Claims19
A steel composition consisting essentially of:
- 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, wherein the steel composition when heat treated has a resilience KV at −40° C. of at least 40 joules.
24 more elements
Dependencies are inferred from the claim text.