UNS C19025 Nickel-Tin Copper
C19025 copper is a lightly alloyed grade of copper, formulated for primary forming into wrought products. It has a moderately low thermal conductivity among wrought coppers. In addition, it has a moderately low electrical conductivity and a moderately high embodied energy.
The properties of C19025 copper include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C19025 copper to: wrought coppers (top), all copper alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
120 GPa 17 x 106 psi
Elongation at Break
8.0 to 17 %
Poisson's Ratio
0.34
Shear Modulus
43 GPa 6.3 x 106 psi
Shear Strength
300 to 360 MPa 43 to 53 x 103 psi
Tensile Strength: Ultimate (UTS)
480 to 620 MPa 70 to 89 x 103 psi
Thermal Properties
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
200 °C 390 °F
Melting Completion (Liquidus)
1080 °C 1980 °F
Melting Onset (Solidus)
1020 °C 1870 °F
Specific Heat Capacity
380 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
160 W/m-K 93 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
40 % IACS
Electrical Conductivity: Equal Weight (Specific)
40 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
2.8 kg CO2/kg material
Embodied Energy
44 MJ/kg 19 x 103 BTU/lb
Embodied Water
320 L/kg 38 gal/lb
Common Calculations
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
15 to 19 points
Strength to Weight: Bending
15 to 18 points
Thermal Diffusivity
47 mm2/s
Thermal Shock Resistance
17 to 22 points
Alloy Composition
Among wrought copper alloys, the composition of C19025 copper is notable for including phosphorus (P) and tin (Sn). Phosphorus is used as an alloy deoxidizer, and to reduce vulnerability to dezincification. Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media.
| Cu | 97.1 to 98.5 | |
| Ni | 0.8 to 1.2 | |
| Sn | 0.7 to 1.1 | |
| Zn | 0 to 0.2 | |
| P | 0.030 to 0.070 | |
| res. | 0 to 0.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B422: Standard Specification for Copper-Aluminum-Silicon-Cobalt Alloy, Copper-Nickel-Silicon-Magnesium Alloy, Copper-Nickel-Silicon Alloy, Copper-Nickel-Aluminum-Magnesium Alloy, and Copper- Nickel-Tin Alloy Sheet and Strip
Copper Alloys: Preparation, Properties and Applications, Michael Naboka and Jennifer Giordano (editors), 2013
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001