| On the basis of phosphorus bronze, trace alloying elements are added to form Fe-P and Ni Si strengthening phases, which maintain high conductivity while possessing high performance. The wear resistance, high temperature resistance, stress relaxation resistance, and corrosion resistance are far superior to tin phosphorus bronze, and the cost advantage is greater. It is widely used in electronic and electrical connectors, connectors, switch parts, terminal components, sliding pieces, clips, etc. | |||||||
| Grade | Chemical composition（%） | Thickness (mm) |
|||||
| GB | ASTM | JIS | Cu | Ni | P | Sn | 0.2-3.0 |
| QSn2.5 | C50710 | C5071 | Balance | 0.1-0.4 | 0.03-0.1 | 1.8-2.5 | |
| Physical properties | |||||||
| Density (g/cm³) |
Modulus of elasticity (GPa) |
Thermal expansion coefficient (×10-6/K) |
Electrical conductivity (%IACS) |
Thermal conductivity W(m·K) |
|||
| 8.8 | 120 | 17 | 28 | 150 | |||
| Mechanical properties | Bend properties | ||||||
| Temper | Hardness HV |
Tension test | 90°R/T（Thick＜0.8mm） | ||||
| Tensile Strength Rm/MPa |
Yield Strength MPa |
Elongation % |
Good way | Bad way | |||
| H02 | 140-170 | 430-530 | ≥330 | ≥10 | 0 | 0 | |
| H04 | 160-190 | 520-590 | ≥450 | ≥3 | 0.5 | 1 | |
| H06 | 180-210 | 580-660 | ≥580 | ≥3 | 1 | 1.5 | |
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