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C74500 Nickel Silver vs. C78200 Nickel Silver

Both C74500 nickel silver and C78200 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 C74500 nickel silver and the bottom bar is C78200 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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

Comparable Variants