# US 11,306,374 B2 · High-strength aluminum alloy and high- strength aluminum alloy casting

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- Number: US 11,306,374 B2
- Document ID: US11306374B2
- Status: Granted
- Kind: B2
- Application number: 16/484,991
- Filed: 2018-02-14
- Published: 2020-02-20
- Granted: 2022-04-19
- Earliest claimed: 2017-02-17
- Assignees: Gam Co., Ltd.
- Applicants: Gam Co., Ltd.
- Inventors: Jin Yeol Choi; Byung-Cheol Lee
- Web page: https://patentgrep.com/patent/US11306374B2

## CPC

- C22C 21/14: with silicon
- C22C 21/00: Alloys based on aluminium
- C22C 21/02: with silicon as the next major constituent
- C22C 21/10: with zinc as the next major constituent
- C22C 21/16: with magnesium
- C22C 21/18: with zinc
- C22C: ALLOYS (treatment of alloys C21D, C22F)

## Abstract

Provided is a high-strength aluminum alloy including 2.0 to 13.0% by weight of copper (Cu), 0.4 to 4.0% by weight of manganese (Mn), 0.4 to 2.0% by weight of iron (Fe), 6.0 to 10.0% by weight of silicon (Si), greater than 0.0% by weight and 7.0 or less % by weight of zinc (Zn), greater than 0.0% by weight and 2.0 or less % by weight of magnesium (Mg), greater than 0.0% by weight and 1.0 or less % by weight of chromium (Cr), greater than 0.0% by weight and 3.0 or less % by weight of nickel (Ni), greater than 0.0% by weight and 0.05 or less % by weight of production-induced impurities, and the balance of aluminum (Al).

## Claims

### Claim 1

A high-strength aluminum alloy, consisting of 4.3% by weight of copper (Cu), 1.9% by weight of manganese (Mn), 1.9% by weight of iron (Fe), 7.8% by weight of silicon (Si), 6.6% by weight of zinc (Zn), 1.7% by weight of magnesium (Mg), and a balance of aluminum (Al),
wherein the high-strength aluminum alloy has a compressive strength value of 636 MPa and an elongation rate of 11.0%.