KHP®181 (CuCrZr)
Standard designations
EN not standardized /UNS C18160
| Chemical composition | |
|---|---|
| Cu | Balance |
| Cr [%] | 0.20 - 1.20 |
| Zr [%] | 0.05 - 0.25 |
Description / applications
KHP®181 is a precipitation-hardened CuCrZr alloy. It combines exceptionally high electrical conductivity with very good spring properties, even at high temperatures (> 200°C). The material is therefore frequently used in current-carrying spring elements in highvoltage applications, e.g., in connectors for electric vehicles.
| Physical properties¹ | |
|---|---|
| Density | 8.9 g/cm³ |
| Electrical conductivity | 50 m/Ω·mm² 86% IACS² |
| Thermal conductivity | 335 W/m·K |
| Thermal expansion coefficient | 17.3·10-6/K |
| E modulus | 137 GPa³ |
| ¹Approximate values in soft state, measured at ambient temperature ²IACS = International Annealed Copper Standard ³1 GPa = 1 kN/mm² |
| Processing information | |
|---|---|
| Weldability | good |
| Solderability | good |
| Stress crack corrosion | none |
| Mechanical properties | |||||
|---|---|---|---|---|---|
| Condition | Tensile strength Rm [MPa] | Yield strength Rp0.2 [MPa] | Elongation A50 [%] |
Hardness HV |
|
| R480 | 480-560 | min. 450 | min. 8 | 150-190 | |
| R540 | 540-630 | min. 500 | min. 4 | 160-200 | |
| R540S | 540-630 | min. 500 | min. 7 | 160-200 |