# US 2019/0316231 A1 · Aluminum alloy for die casting and method for manufacturing aluminum alloy casting using the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0316231 A1
- Document ID: US20190316231A1
- Status: Published application
- Kind: A1
- Application number: 16/172,813
- Filed: 2018-10-28
- Published: 2019-10-17
- Earliest claimed: 2018-04-16
- Assignees: Hyundai Motor Company; Kia Motors Corporation; SJ Tech Co., Ltd.
- Applicants: Hyundai Motor Company; Kia Motors Corporation; Sj Tech Co., Ltd.
- Inventors: Byong Soo Kim; Il Huh; Jung Mok Lee
- Web page: https://patentgrep.com/patent/US20190316231A1

## CPC

- C22C 21/02: with silicon as the next major constituent
- C22C 21/04: Modified aluminium-silicon alloys
- B22D 21/007: {with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C}
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22)

## Abstract

Disclosed are an aluminum alloy for a die casting and a method of producing an aluminum alloy casting product. The aluminum alloy may include silicon (Si) in an amount of about 7.5 to 9.5 wt %; magnesium (Mg) in an amount of about 2.5 to 3.5 wt %; iron (Fe) in an amount of about 0.5 to 1.0 wt %; manganese (Mn) in an amount of about 0.1 to 0.6 wt %; and aluminum (Al) constituting the remaining balance of the aluminum alloy, all the wt % are based on the total weight of the aluminum alloy.

## Claims

### Claim 1

An aluminum alloy for a die casting, comprising,
silicon (Si) in an amount of about 7.5 to 9.5 wt %;
magnesium (Mg) in an amount of about 2.5 to 3.5 wt %;
iron (Fe) in an amount of about 0.5 to 1.0 wt %;
manganese (Mn) in an amount of 0.1 to 0.6 wt %; and
aluminum (Al) constituting the remaining balance of the aluminum alloy,
all the wt % based on the total weight of the aluminum alloy.

### Claim 2 (depends on 1)

The aluminum alloy of claim 1, further comprising beryllium (Be) in an amount of about 0.015 wt % or less but greater than 0 wt %.

### Claim 3 (depends on 1)

The aluminum alloy of claim 1, wherein the aluminum alloy does not comprise cooper (Cu), zinc (Zn), and nickel (Ni).

### Claim 4 (depends on 2)

The aluminum alloy of claim 2, wherein the aluminum alloy does not comprise cooper (Cu), zinc (Zn), and nickel (Ni).

### Claim 5 (depends on 1)

The aluminum alloy of claim 1, wherein the aluminum alloy has thermal conductivity of about 135 W/m·K or greater.

### Claim 6 (depends on 1)

The aluminum alloy of claim 1, wherein the aluminum alloy has yield strength of about 260 MPa or greater

### Claim 7 (depends on 1)

The aluminum alloy of claim 1, wherein the aluminum alloy has tensile strength of about 320 MPa or greater.

### Claim 8 (depends on 1)

The aluminum alloy of claim 1, wherein the aluminum alloy has elongation of 3% or greater.

### Claim 9

A method for manufacturing an aluminum alloy casting product, comprising:
preparing an molten aluminum alloy comprising silicon (Si), magnesium (Mg), iron (Fe), manganese (Mn), and aluminum (Al);
injecting the molten aluminum alloy into a mold; and
casting the molten aluminum alloy into the aluminum alloy casting product.

### Claim 10 (depends on 9)

The method according to claim 9, further comprising preheating the mold to a temperature of about 200 to 250° C. before the injecting.

### Claim 11 (depends on 9)

The method according to claim 9, wherein the molten aluminum alloy comprises silicon (Si) in an amount of about 7.5 to 9.5 wt %; magnesium (Mg) in an amount of about 2.5 to 3.5 wt %; iron (Fe) in an amount of about 0.5 to 1.0 wt %; manganese (Mn) in an amount of about 0.1 to 0.6 wt %; and aluminum (Al) constituting the remaining balance of the molten alloy, wherein all the wt % are based on the total weight of the molten aluminum alloy.

### Claim 12 (depends on 11)

The method according to claim 11, wherein the molten aluminum alloy further comprises beryllium (Be) in an amount of about 0.015 wt % or less but greater than 0 wt %.

### Claim 13 (depends on 11)

The method according to claim 11, wherein the molten aluminum alloy does not comprise cooper (Cu), zinc (Zn), and nickel (Ni).

### Claim 14 (depends on 12)

The method according to claim 12, wherein the molten aluminum alloy does not comprise cooper (Cu), zinc (Zn), and nickel (Ni).

### Claim 15 (depends on 11)

The method according to claim 11, wherein the aluminum alloy casting product has thermal conductivity of about 135 W/m·K or greater.

### Claim 16 (depends on 11)

The method according to claim 11, wherein the aluminum alloy casting product has yield strength of about 260 MPa or greater.

### Claim 17 (depends on 11)

The method according to claim 11, wherein the aluminum alloy casting product has tensile strength of 320 MPa or greater.

### Claim 18 (depends on 11)

The method according to claim 11, wherein the aluminum alloy casting product has elongation of 3% or greater.

### Claim 19 (depends on 1)

A vehicle comprising an aluminum alloy of claim 1.

### Claim 20 (depends on 1)

A die casting product comprising an aluminum alloy of claim 1.