C18070 is a CuCrSiTi alloy that can be hardened by cold forming and by precipitation during a heat treatment. This alloy provides a good combination of high electrical conductivity, good strength, good bendability, excellent hot and cold forming properties, and good corrosion resistance. Due to the precipitation, the relaxation properties, even at temperatures up to 200°C, are excellent. C18070 main applications are Automotive Switches and Relays, Contacts, Connectors, Terminals, Press fits, and Hybrid Cars.
Fabrication Properties Of C18070 Automotive Terminal
| Cold Forming Properties | Good |
| Machinability (Rating 20) | Less suitable |
| Electroplating Properties | Good |
| Hot Tinning Properties | Good |
| Soft Soldering, Brazing | Good |
| Resistance Welding | Less suitable |
| Gas Shielded Welding | Excellent |
| Laser Welding | Fair |
Properties Of C18070 Automotive Terminal ( at 20 °C)
Density
| 8.9 g/cm³ |
| Thermal expansion coefficient | 20 - 300 °C, 18 10-6/K |
| Specific heat capacity | 0.38 J/(g·K) |
| Thermal conductivity | 310 W/(m·K) |
| Electrical conductivity | (1 MS/m = 1 m/(Ω mm²) 45 MS/m |
| Electrical conductivity | (IACS) 78 % |
| Thermal coefficient of electrical resistance | 3 10-3/K |
| Modulus of elasticity | (1 GPa = 1 kN/mm²) cold-formed 135 GPa |
| Tensile Strength | 400 - 630 MPa |
| Yield Strength
Minimum | 300 - 520 MPa |
| Elongation
Minimum | 8 - 10% |
| Hardness HV | 120 - 190 |
