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Half-Hard (H02) C78200 Nickel Silver

H02 C78200 nickel silver is C78200 nickel silver in the H02 (half hard) temper. The graph bars on the material properties cards below compare H02 C78200 nickel silver to: wrought copper-nickels (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

110 GPa 16 x 106 psi

Elongation at Break

12 %

Poisson's Ratio

0.32

Rockwell B Hardness

78

Rockwell Superficial 30T Hardness

69

Shear Modulus

43 GPa 6.2 x 106 psi

Shear Strength

320 MPa 47 x 103 psi

Tensile Strength: Ultimate (UTS)

480 MPa 69 x 103 psi

Tensile Strength: Yield (Proof)

430 MPa 63 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

160 °C 320 °F

Melting Completion (Liquidus)

1000 °C 1830 °F

Melting Onset (Solidus)

970 °C 1780 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

48 W/m-K 28 BTU/h-ft-°F

Thermal Expansion

19 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

11 % IACS

Electrical Conductivity: Equal Weight (Specific)

12 % IACS

Otherwise Unclassified Properties

Base Metal Price

28 % relative

Density

8.4 g/cm3 520 lb/ft3

Embodied Carbon

3.3 kg CO2/kg material

Embodied Energy

52 MJ/kg 22 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

55 MJ/m3

Resilience: Unit (Modulus of Resilience)

840 kJ/m3

Stiffness to Weight: Axial

7.4 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

16 points

Strength to Weight: Bending

16 points

Thermal Diffusivity

15 mm2/s

Thermal Shock Resistance

16 points

Alloy Composition

Copper (Cu) 63 to 67
Zinc (Zn) 20.2 to 28.5
Nickel (Ni) 7.0 to 9.0
Lead (Pb) 1.5 to 2.5
Manganese (Mn) 0 to 0.5
Iron (Fe) 0 to 0.35
Residuals 0 to 0.5

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015