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C18090 belongs to Cu-Ni-Sn-Cr-Ti alloy, which achieves excellent comprehensive properties through cold working and heat treatment; C18090 has excellent bending performance, high strength, and good corrosion resistance; Excellent conductivity and thermal conductivity, as well as excellent welding, soldering, and brazing performance. It is widely used in industries such as signal connectors, relays, and semiconductors.
| Grade | Chemical composition（%）≤ | Thickness (mm) |
||||
| ASTM | Cu | Sn | Ni | Cr | Ti | |
| C18090 | ＞96 | 0.5-1.2 | 0.3-1.2 | 0.2-1.0 | 0.15-0.8 | 0.1-0.3 |
| Physical properties | |||||
| Density (g/cm³) |
Modulus of elasticity (GPa) |
Thermal expansion coefficient (×10-6/K) |
Electrical conductivity (%IACS) |
Thermal conductivity W(m·K) |
|
| 8.82 | 133 | 17.6 | 60 | 240 | |
| Mechanical properties | Bend properties | |||||
| Temper | Hardness HV |
Tension test | 90°R/T(Thick＜0.5mm) | |||
| Tensile Strength Rm/MPa |
Yield Strength MPa |
Elongation % |
Good way | Bad way | ||
| R450 | ≥130 | 450-540 | ≥350 | ≥6 | 0.5 | 0.5 |
| R540 | ≥160 | 540-620 | ≥450 | ≥3 | 1.0 | 2.0 |
| R620 | ≥180 | 620-700 | ≥520 | ≥1 | 3.0 | 6.0 |
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