bedra 18150
Copper Chromium Zirconium
Characteristics:
This high-copper alloy, containing small additions of chromium (Cr) and zirconium (Zr), is strengthened by precipitation hardening. This treatment significantly enhances the alloy's mechanical strength while maintaining its exceptionally high electrical and thermal conductivity. Furthermore, the zirconium content helps prevent electrode sticking during the spot welding of galvanized steel.
Typical applications:
It is extensively used for spot and seam welding electrodes, particularly cap-style resistance welding electrodes. Its excellent conductivity and mechanical properties make it suitable for electrical contacts, current-carrying shafts, arms, and backup bars in welding and electrical equipment.
Standardization and composition
| UNS | C18150 |
|---|---|
| EN | CuCr1Zr(CW106C) |
| GB | TCr1-0.15 |
| Cu | balance |
| Cr | 0.5-1.5% |
| Zr | 0.03-0.3% |
| Fe | ≤ 0.08% |
| Si | ≤ 0.1% |
| Others | ≤ 0.2% |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density (g/cm³) | 8.9 |
|---|---|
| Electrical conductivity (%IACS) | 79 |
| Thermal conductivity (W / m x K) | 324 |
| Coefficient of thermal expansion② (10-6/K) | 16.5 |
| Modulus of elasticity (GPa) | 117 |
Fabrication Properties
Note③：C37700 = 100% Note④：C36000 = 100%
| Capacity for being cold worked | Good |
| Brazing | Good |
| Resistance welding | Not recommended |
| Forgeability rating ③ | 80% |
| Machinability rating④ | 20% |
Mechanical Properties
| Diameter (mm) | Temper | Tensile Strength (MPa min.) | Yield Strength (MPa min.) | Elongation (% min.) |
|---|---|---|---|---|
| 4 < Ф ≤ 30 | R470 | 470 | 420 | 8 |
| 30 < Ф ≤ 50 | R430 | 430 | 350 | 10 |
| 50 < Ф ≤ 100 | R370 | 370 | 250 | 16 |
Dimension Tolerance and Delivery Form
Note⑤：The tolerances listed in the table are specified as all plus or all minus. When tolerances are specified as plus and minus (±), half the values given.
| Straight bar | Coil wire | |||||
| Diameter (mm) | Tolerance⑤ (mm) | Ovality (mm) | Length (mm. max.) | Straightness (mm/m max.) | ID mm max. | Weight kg max. |
| 0.5 ≤ Φ ≤ 3 | 0.04 | 0.02 | / | / | 550 | 50 |
| 5 < Φ ≤ 10 | 0.06 | 0.03 | 4000 | 1.0 | 800 | 500 |
| 10 < Φ ≤ 20 | 0.10 | 0.05 | 4000 | 1.0 | 1200 | 500 |
| 20 < Φ ≤ 25 | 0.16 | 0.08 | 4000 | 1.0 | ||
| 25 < Φ ≤ 30 | 0.18 | 0.09 | 4000 | 1.0 | ||
| 30 < Φ ≤ 40 | 0.20 | 0.10 | 4000 | 1.0 | ||
| 40 < Φ ≤ 45 | 0.24 | 0.12 | 4000 | 1.0 | ||
| 45 < Φ ≤ 50 | 0.30 | 0.15 | 4000 | 1.0 | ||
| 50 < Φ ≤ 60 | 0.34 | 0.17 | 4000 | 1.0 | ||
| 60 < Φ ≤ 80 | 0.44 | 0.22 | 2500 | 3.0 | ||
| 80 < Φ ≤ 100 | 0.60 | 0.30 | 2000 | 3.0 | ||
| 100 < Φ ≤ 120 | 1.00 | 0.50 | 1500 | 3.0 | ||
| 120 ≤ Φ ≤ 160 | 2.00 | 1.00 | 1000 | 5.0 |
Further product information
PDF Datasheet | EN PDF Datasheet | VI PDF Datasheet | ZH
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