Copper Chromium | Alloy Grade - CuCr
Material No. Unified Numbering System (UNS): C18200
Chemical Composition
| Element | Cu | Cr |
|---|---|---|
| Min (%) | Rem | 0.6 |
| Max (%) | Rem | 1.2 |
1. Precipitation hardened alloy.
2. Cu value includes Ag.
Copper Chromium is a heat treatable alloy offering excellent electrical and thermal conductivity combined with high mechanical strength.
Common Fabrication Processes
Hot Forging
Cold Drawing
Heat Treating
Machining
Extruding
Bending
Mechanical & Electrical Properties
| Form | Range in mm | Tensile Strength in N/MM² | Elongation in % | Rockwell Hardness HRB | Conductivity% |
|---|---|---|---|---|---|
| Forged Rod | < 25 | ≥440 | ≥12 | ≥70 | ≥80 |
| Forged Rod | 25-50 | ≥380 | ≥15 | ≥70 | ≥80 |
| Flat Bars | - | ≥360 | ≥12 | ≥65 | ≥80 |
Physical Properties
| Melting Point – Liquidus °C | 1075 |
| Melting Point – Solidus °C | 1070 |
| Density lb/cu in. at 20°C | 0.321 |
| Specific Gravity | 8.89 |
| Electrical Conductivity% IACS at 20°C | 80-85 |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 20°C | 185 |
| Modulus of Elasticity in Tension ksi | 17000 |
Applicable Form & Size
| Form | Size Dimensions |
|---|---|
| Rod | Dia: Ø6 mm-Ø120mm | Length: 3 Mtr. max |
| Flat | Thick: 5 mm-50 mm | Width: 20 mm-120 mm | Length: 2 Mtr. max |
Apart from above we can also manufacture as per customer specification.
Typical Industrial Applications
Electrical Sector
- Resistance Spot Welding Electrodes
- Circuit Breaker Contacts
- Switchgear Assemblies
Industrial & Automotive Sector
- Plunger Tips for Die Casting
- Continuous Casting Molds