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C90500 Gun Metal vs. C95700 Bronze

Both C90500 gun metal and C95700 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 76% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is C90500 gun metal and the bottom bar is C95700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
130
Elongation at Break, % 20
23
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 40
47
Tensile Strength: Ultimate (UTS), MPa 320
680
Tensile Strength: Yield (Proof), MPa 160
310

Thermal Properties

Latent Heat of Fusion, J/g 190
230
Maximum Temperature: Mechanical, °C 170
220
Melting Completion (Liquidus), °C 1000
990
Melting Onset (Solidus), °C 850
950
Specific Heat Capacity, J/kg-K 370
440
Thermal Conductivity, W/m-K 75
12
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 11
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 35
26
Density, g/cm3 8.7
8.2
Embodied Carbon, kg CO2/kg material 3.6
3.3
Embodied Energy, MJ/kg 59
54
Embodied Water, L/kg 390
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
130
Resilience: Unit (Modulus of Resilience), kJ/m3 110
390
Stiffness to Weight: Axial, points 6.9
8.5
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 10
23
Strength to Weight: Bending, points 12
21
Thermal Diffusivity, mm2/s 23
3.3
Thermal Shock Resistance, points 12
21

Alloy Composition

Aluminum (Al), % 0 to 0.0050
7.0 to 8.5
Antimony (Sb), % 0 to 0.2
0
Copper (Cu), % 86 to 89
71 to 78.5
Iron (Fe), % 0 to 0.2
2.0 to 4.0
Lead (Pb), % 0 to 0.3
0 to 0.030
Manganese (Mn), % 0
11 to 14
Nickel (Ni), % 0 to 1.0
1.5 to 3.0
Phosphorus (P), % 0 to 1.5
0
Silicon (Si), % 0 to 0.0050
0 to 0.1
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 9.0 to 11
0
Zinc (Zn), % 1.0 to 3.0
0
Residuals, % 0
0 to 0.5