# US 11,028,465 B2 · Low-cost lead-free dezincification-resistant brass alloy for casting

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- Number: US 11,028,465 B2
- Document ID: US11028465B2
- Status: Granted
- Kind: B2
- Application number: 16/064,793
- Filed: 2016-12-21
- Published: 2018-12-27
- Granted: 2021-06-08
- Earliest claimed: 2015-12-22
- Assignees: Xiamen Lota International Co., Ltd.
- Applicants: Xiamen Lota International Co., Ltd
- Inventors: Zhenqing Hu; Qiu Bi; Jia Long; Yuanhao Cheng; Huawei Zhang; Qing Lv
- Web page: https://patentgrep.com/patent/US11028465B2

## CPC

- C22C 9/04: with zinc as the next major constituent
- C22C: ALLOYS (treatment of alloys C21D, C22F)

## Abstract

A low-cost lead-free dezincification corrosion-resistant brass alloy for casting. The brass alloy contains: 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.05-0.8 wt. % of Al, 0-0.1 wt. % of Sn, and 0.05-0.16 wt. % of As, with the balance being Zn and inevitable impurities. Moreover, the equivalent weight of zinc X meets the requirements of the following formula: 35%<X<39.5%, and X=(B+ΣCiKi/(A+B+ΣCiKi); in the formula, X is the equivalent weight of zinc in the complex brass, A is the copper content (%), B is the actual zinc content (%), Ci is the content (%) of the other alloy elements, and CiKi is the corresponding equivalent weight of zinc of various elements.

## Claims

### Claim 1

A dezincification-resistant brass alloy, wherein the brass alloy consists of 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.53-0.8 wt. % of Al, less than 0.1 wt. % of Sn, 0.05-0.16 wt. % of As, with the balance being Zn and unavoidable impurities.

### Claim 2 (depends on 1)

The brass alloy according to claim 1, wherein the content of Cu in the brass alloy is: 62-64 wt. %.

### Claim 3 (depends on 1)

The brass alloy according to claim 1, wherein
the content of Pb in the brass alloy is: 0.1-0.25 wt. %.

### Claim 4 (depends on 1)

The brass alloy according to claim 1, wherein
the content of As in the brass alloy is: 0.08-0.12 wt. %.

### Claim 5

A dezincification-resistant brass alloy,
wherein the brass alloy consists of 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.53-0.8 wt. % of Al, less than 0.1 wt. % of Sn, 0.05-0.16 wt. % of As, and one or more elements selected from Ni, Fe, Si, P and B; wherein the content of Ni in the brass alloy is: 0.05-0.5 wt. %; the content of Fe is 0.02-0.2 wt. %; the content of Si is 0.03-0.3 wt. %; the content of P is 0.01-0.2 wt. %; and the content of B is less than 15 ppm; with the balance being Zn and unavoidable impurities.

### Claim 6 (depends on 5)

The brass alloy according to claim 5, wherein the content of Ni in the brass alloy is: 0.05-0.2 wt. %; the content of Fe is 0.05-0.1 wt. %; the content of Si is 0.05-0.2 wt. %; the content of P is 0.05-0.1 wt. %; and the content of B is 5-15 ppm.

### Claim 7

A dezincification-resistant brass alloy, wherein the brass alloy consists of 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.24-0.4 wt. % of Al, 0.27-0.4 wt. % of Sn, 0.05-0.16 wt. % of As, with the balance being Zn and unavoidable impurities.

### Claim 8 (depends on 7)

The brass alloy according to claim 7, wherein the content of Cu in the brass alloy is: 62-64 wt. %.

### Claim 9 (depends on 7)

The brass alloy according to claim 7, wherein the content of Al in the brass alloy is: 0.24-0.3 wt. %.

### Claim 10 (depends on 7)

The brass alloy according to claim 7, wherein
the content of Pb in the brass alloy is: 0.1-0.25 wt. %.

### Claim 11 (depends on 7)

The brass alloy according to claim 7, wherein the content of Sn in the brass alloy is: 0.27-0.3 wt. %.

### Claim 12 (depends on 7)

The brass alloy according to claim 7, wherein the content of As in the brass alloy is: 0.08-0.12 wt. %.

### Claim 13

A dezincification-resistant brass alloy, wherein the brass alloy consists of 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.24-0.4 wt. % of Al, 0.27-0.4 wt. % of Sn, 0.05-0.16 wt. % of As, one or more elements selected from Ni, Fe, Si, P and B; the content of Ni in the brass alloy is 0.05-0.5 wt. %; the content of Fe is 0.02-0.2 wt. %; the content of Si is 0.03-0.3 wt. %; the content of P is 0.01-0.2 wt. %; and the content of B is less than 15 ppm; with the balance being Zn and unavoidable impurities.

### Claim 14 (depends on 13)

The brass alloy according to claim 13, wherein the content of Ni in the brass alloy is 0.05-0.2 wt. %; the content of Fe is 0.05-0.1 wt. %; the content of Si is 0.05-0.2 wt. %; the content of P is 0.05-0.1 wt. %; and the content of B is 5-15 ppm.

### Claim 15

A dezincification-resistant brass alloy, wherein the brass alloy consists of 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.53-0.8 wt. % of Al, 0.05-0.16 wt. % of As, with the balance being Zn and unavoidable impurities.

### Claim 16

A dezincification-resistant brass alloy for casting, wherein the brass alloy consists of 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.53-0.8 wt. % of Al, 0.05-0.16 wt. % of As, one or more elements selected from Ni, Fe, Si, P and B; the content of Ni in the brass alloy is: 0.05-0.5 wt. %; the content of Fe is 0.02-0.2 wt. %; the content of Si is 0.03-0.3 wt. %; the content of P is 0.01-0.2 wt. %; and the content of B is 5-15 ppm, with the balance being Zn and unavoidable impurities.