CuCr1Zr — C18150
CuCr1Zr – UNS.C18150 Chromium Zirconium Copper C18150 is an excellent and unique copper alloy with high electrical conductivity, hardness, and ductility, moderate strength
CuCr1Zr — C18150
CuCr1Zr – UNS.C18150 Chromium Zirconium Copper C18150 is an excellent and unique copper alloy with high electrical conductivity, hardness, and ductility, moderate strength, and excellent resistance to softening at elevated temperatures. The addition of 0.1% zirconium (Zr) and 1.0% chromium (Cr) to copper results in a heat treatable alloy which may be solution treated and subsequently aged to produce these desirable properties. Rod is usually supplied from the mill in the fully aged and drawn condition so no further heat treatment is required by the fabricator. The softening temperature of properly heat treated C18150 rod exceeds 500°C as compared to unalloyed pure copper which softens at 200°C, and silver bearing coppers which soften at 350°C.
Furthermore, many evidences shows that C18150 can provide less sticking and resisting deformation longer than its C18200 counterpart in some specific situatons.

Where C18150 Is Used
Typical end uses published by Vital for this grade.
Electrical Industry
Resistance Welding Electrodes, Circuit Breaker Switches
Consumer
Rod Extensions, Pencil-type, Light Soldering Guns, Tips
Industrial
Welding Wheels, Tips and Rod extensions for resistance seam and spot welding
Specifications And Material Data
| Cr | 0.50-1.50% |
|---|---|
| Zr | 0.05-0.25% |
| Cu | Balance |
Copper plus additions equal 99.70% minimum.
| Density at 68°F | 0.321 Lbs./In.3 |
|---|---|
| Specific Gravity | 8.89 |
| Melting Point (Liquidus) | 1080°C (1976°F) |
| (Solidus) | 1070°C (1958°F) |
| Coefficient of Thermal Expansion per °F | 9.5 x 10-6 (77-212°F) |
| Electrical Conductivity at 68°F (volumetric) | 80% IACS (aged and drawn) |
| Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F | 187 |
| Modulus of Elasticity - Tension | 17,000 ksi |
1). the units are based upon US Customary. 2). the typical physical properties apply to age hardened products.
Sizes And Product Forms
Available Sizes
Custom Diameter & Sizes, Random Mill lengths
Available Products And Forms
Round bars, Flat bars, Square bars, Rectangular bars, Hexagon bars, Plates
Custom shapes are available upon request.
International Specification
| Rods/Bars/Plates/Sheets | UNS.C18150, SAE J461,463;RWMA Class 2, ISO5182-1991 |
|---|---|
| European Standards | CuCr1Zr, DIN 17666 2.1293, CW106C to EN |
Unless otherwise specified, material will be produced to ASTM & RWMA.
Abbreviations
- ASTM — American Society for Testing and Materials
- SAE — Society of Automotive Engineers
- RWMA — Resistance Welder Manufacturers' Association
Tempers And Mechanical Data
The detailed Mechanical Properties will be available on request from customers.
| Rods/Bars/Tubes | AT(TF00), HT (TH04) |
|---|---|
| Plates | AT(TF00), HT(TH04) |
Frequently Asked Questions
Answers drawn from the Vital technical data for this page.
What is the chemical composition of C18150?
C18150 is supplied to the following nominal composition:
- Cr: 0.50-1.50%
- Zr: 0.05-0.25%
- Cu: Balance
What are the typical physical properties of C18150?
Typical values published by Vital for C18150:
- Density at 68°F: 0.321 Lbs./In.3
- Specific Gravity: 8.89
- Melting Point (Liquidus): 1080°C (1976°F)
- (Solidus): 1070°C (1958°F)
- Coefficient of Thermal Expansion per °F: 9.5 x 10-6 (77-212°F)
- Electrical Conductivity at 68°F (volumetric): 80% IACS (aged and drawn)
- Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F: 187
- Modulus of Elasticity - Tension: 17,000 ksi
Which international specifications does C18150 meet?
- Rods/Bars/Plates/Sheets: UNS.C18150, SAE J461,463;RWMA Class 2, ISO5182-1991
- European Standards: CuCr1Zr, DIN 17666 2.1293, CW106C to EN
Can you supply mechanical property data for C18150?
The detailed Mechanical Properties will be available on request from customers.
Which tempers are most commonly used?
- Rods/Bars/Tubes: AT(TF00), HT (TH04)
- Plates: AT(TF00), HT(TH04)
Which product forms and sizes are available?
Custom Diameter & Sizes, Random Mill lengths Round bars, Flat bars, Square bars, Rectangular bars, Hexagon bars, Plates Custom shapes are available upon request.
How do I request a quotation?
Email the grade, temper, dimensions and quantity to sales@vitalmaterialgroup.com. Unless otherwise specified, material is produced to ASTM.
Quote C18150 To Your Specification
Send grade, temper, dimensions and quantity. Custom shapes are available on request.







