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C87300 Bronze vs. C97800 Nickel Silver

Both C87300 bronze and C97800 nickel silver are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 66% of their average alloy composition in common.

For each property being compared, the top bar is C87300 bronze and the bottom bar is C97800 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
130
Elongation at Break, % 22
10
Poisson's Ratio 0.34
0.33
Shear Modulus, GPa 43
48
Tensile Strength: Ultimate (UTS), MPa 350
370
Tensile Strength: Yield (Proof), MPa 140
170

Thermal Properties

Latent Heat of Fusion, J/g 280
220
Maximum Temperature: Mechanical, °C 200
230
Melting Completion (Liquidus), °C 970
1180
Melting Onset (Solidus), °C 820
1140
Specific Heat Capacity, J/kg-K 410
390
Thermal Conductivity, W/m-K 28
25
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.1
4.0
Electrical Conductivity: Equal Weight (Specific), % IACS 6.4
4.1

Otherwise Unclassified Properties

Base Metal Price, % relative 29
40
Density, g/cm3 8.6
8.8
Embodied Carbon, kg CO2/kg material 2.7
5.1
Embodied Energy, MJ/kg 42
76
Embodied Water, L/kg 300
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 62
31
Resilience: Unit (Modulus of Resilience), kJ/m3 86
120
Stiffness to Weight: Axial, points 7.5
8.1
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 11
12
Strength to Weight: Bending, points 13
13
Thermal Diffusivity, mm2/s 8.0
7.3
Thermal Shock Resistance, points 13
13

Alloy Composition


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Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Copper (Cu), % 94 to 95.7
64 to 67
Iron (Fe), % 0 to 0.2
0 to 1.5
Lead (Pb), % 0 to 0.2
1.0 to 2.5
Manganese (Mn), % 0.8 to 1.5
0
Nickel (Ni), % 0
24 to 27
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 3.5 to 5.0
0 to 0.15
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 0
4.0 to 5.5
Zinc (Zn), % 0 to 0.25
1.0 to 4.0
Residuals, % 0 to 0.5
0 to 0.4