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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.

Copper (Cu) 97.1 to 98.5
Nickel (Ni) 0.8 to 1.2
Tin (Sn) 0.7 to 1.1
Zinc (Zn) 0 to 0.2
Phosphorus (P) 0.030 to 0.070
Residuals 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