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C78200 Nickel Silver vs. C74500 Nickel Silver

Both C78200 nickel silver and C74500 nickel silver are copper alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is C78200 nickel silver and the bottom bar is C74500 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Elongation at Break, % 3.0 to 40
3.0 to 24
Poisson's Ratio 0.32
0.32
Rockwell B Hardness 65 to 90
66 to 94
Rockwell Superficial 30T Hardness 63 to 75
60 to 79
Shear Modulus, GPa 43
44
Shear Strength, MPa 280 to 400
310 to 380
Tensile Strength: Ultimate (UTS), MPa 370 to 630
390 to 700
Tensile Strength: Yield (Proof), MPa 170 to 570
380 to 600

Thermal Properties

Latent Heat of Fusion, J/g 190
190
Maximum Temperature: Mechanical, °C 160
170
Melting Completion (Liquidus), °C 1000
1020
Melting Onset (Solidus), °C 970
970
Specific Heat Capacity, J/kg-K 390
390
Thermal Conductivity, W/m-K 48
45
Thermal Expansion, µm/m-K 19
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 12
9.7

Otherwise Unclassified Properties

Base Metal Price, % relative 28
29
Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 3.3
3.4
Embodied Energy, MJ/kg 52
54
Embodied Water, L/kg 310
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 120
12 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 1440
620 to 1540
Stiffness to Weight: Axial, points 7.4
7.7
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 12 to 21
13 to 23
Strength to Weight: Bending, points 14 to 19
14 to 21
Thermal Diffusivity, mm2/s 15
14
Thermal Shock Resistance, points 12 to 21
13 to 23

Alloy Composition

Copper (Cu), % 63 to 67
63.5 to 66.5
Iron (Fe), % 0 to 0.35
0 to 0.25
Lead (Pb), % 1.5 to 2.5
0 to 0.1
Manganese (Mn), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 7.0 to 9.0
9.0 to 11
Zinc (Zn), % 20.2 to 28.5
21.2 to 27.5
Residuals, % 0
0 to 0.5

Comparable Variants