Bronze Strips
Bronze strip is copper with tin, aluminum, and trace elements as raw materials, through processing by ingots, hot rolled, cold rolled, heat treatment, surface cleaning, cutting, finishing and packing, materials with high yield strength, fatigue strength, elastic properties and excellent bending formability. It has been widely used in computer CPU socket, car terminals, mobile phone keypad, electrical and other high-tech electronics connectors.
Main Technical Parameters:
3-1 Chemical Composition
| Name | Alloy No. | Chemical Composition( %,Max.) | ||||||||
Sn | Al | Zn | Ni | Fe | Pb | P | Cu | Impurity | ||
Tin Bronze | QSn4-0.3 | 3.5-4.9 | --- | 0.30 | 0.2 | 0.10 | 0.05 | 0.03-0.35 | Rem | 0.2 |
QSn4-3 | 3.5-4.5 | 0.002 | 2.7-3.3 | 0.2 | 0.05 | 0.02 | 0.03-0.35 | Rem | 0.2 | |
QSn6.5-0.1 | 6.0-7.0 | 0.002 | 0.3 | 0.2 | 0.02 | 0.02 | 0.1-0.25 | Rem | 0.1 | |
QSn8-0.3 | 7.0-9.0 | ------ | 0.2 | 0.2 | 0.10 | 0.05 | 0.03-0.35 | Rem | 0.1 | |
Aluminum Bronze | QAl5 | 0.1 | 4.0-6.0 | 0.5 | 0.5 | 0.5 | 0.03 | 0.01 | Rem | 1.6 |
QAl7 | ----- | 6.0-8.5 | 0.2 | 0.5 | 0.5 | 0.02 | ------ | Rem | ------ | |
QAl9-2 | 0.1 | 8.0-10.0 | 1.0 | 0.5 | 0.5 | 0.03 | 0.01 | Rem | 1.7 | |
Name | Alloy No. | Chemical Composition( %,Max.) | |||||||||
Be | Al | Si | Ni | Fe | Pb | Ti | Co | Cu | Imputrity | ||
Beryllium Bronze | QBe2 | 1.8-2.1 | 0.15 | 0.15 | 0.2-0.4 | 0.15 | 0.005 | --- | --- | Rem | 0.5 |
QBe1.9 | 1.85-2.1 | 0.15 | 0.15 | 0.2-0.4 | 0.15 | 0.005 | 0.10-0.25 | --- | Rem | 0.5 | |
QBe1.7 | 1.6-1.85 | 0.15 | 0.15 | 0.2-0.4 | 0.15 | 0.005 | 0.10-0.25 | --- | Rem | 0.5 | |
QBe0.6-2.5 | 0.4-0.7 | 0.20 | 0.20 | ------ | 0.10 | --- | --- | 2.4-2.7 | Rem | --- | |
QBe0.4-1.8 | 0.2-0.6 | 0.20 | 0.20 | 1.4-2.2 | 0.10 | --- | --- | 0.30 | Rem | --- | |
QBe0.3-1.5 | 0.25-0.5 | 0.20 | 0.20 | ------ | 0.10 | --- | --- | 1.4-1.7 | Rem | --- | |
3-2 Alloy Table
| Name | China | ISO | ASTM | JIS |
Tin Bronze | QSn4-0.3 | CuSn4 | C51100 | C5101 |
QSn4-3 | CuSn4Zn2 | --- | --- | |
QSn6.5-0.1 | CuSn6 | C51900 | C5191 | |
QSn8-0.3 | CuSn8 | C52100 | C5210 | |
Aluminum Bronze | QAl5 | CuAl5 | C60600 | ------ |
QAl7 | CuAl7 | C61000 | ------ | |
QAl9-2 | CuAl9Mn2 | ------ | ------ | |
Beryllium Bronze | QBe2 | CuBe2 | C17200 | C1720 |
QBe1.9 | ------ | ------ | ------ | |
QBe1.7 | CuBe1.7 | C17000 | C1700 | |
QBe0.6-2.5 | ------ | C17500 | C1750 | |
QBe0.4-1.8 | ------ | C17510 | C1751 | |
QBe0.3-1.5 | ------ | C17600 | C1760 |
Main Technical Parameters:
3-3-1Specification Unit: mm
| Name | Alloy No.(China) | Temper | Size(mm) | |
Thickness | Width | |||
Tin Bronze Strip | QSn4-3 QSn4-0.3 | O 1/2H H EH | >0.12~2.0 | ≤600 |
O H EH | ||||
Aluminum Bronze Strip | QA15 | O H | >0.2~1.2 | 80~300 |
1/2H H | ||||
O H EH | >0.2~1.2 | 80~300 | ||
Beryllium Bronze Strip | QBe2 QBe1.9 QBe1.7 | O | 0.05-1.5 | 10~340 |
H | ||||
Temper Mark:O. Soft;1/4H. 1/4 Hard;1/2H. 1/2 Hard;H. Hard;EH. Ultrahard.
3-3-2 Tolerance Unit: mm
| Thickness | Width | |||
Thickness Allow Deviation± | Width Allow Deviation ± | |||
<300 | <600 | <400 | <600 | |
0.05~0.1 | 0.005 | ----- | 0.2 | ----- |
0.1~0.3 | 0.008 | 0.015 | 0.3 | 0.4 |
0.3~0.5 | 0.015 | 0.020 | 0.3 | 0.5 |
0.5~0.8 | 0.020 | 0.030 | 0.3 | 0.5 |
0.8~1.2 | 0.030 | 0.040 | 0.4 | 0.6 |
3-3-3 Mechanical Performance:
| Temper | Tensile Strength | Elongation | Hardness | |
M | (O) | ≥295 | 40 | ------ |
Y4 | (1/4H) | 390-510 | 35 | 100-160 |
Y2 | (1/2H) | 440-570 | 10 | 160-205 |
Y | (H) | 540-690 | 8 | 180-230 |
T | (EH) | ≥640 | 5 | ≥200 |
Temper Mark:O. Soft;1/4H. 1/4 Hard;1/2H. 1/2 Hard;H. Hard;EH. Ultrahard.
Manufacturing Technique:
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