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C90500 Gun Metal vs. C91000 Bronze

Both C90500 gun metal and C91000 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 97% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is C90500 gun metal and the bottom bar is C91000 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 20
7.0
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 40
39
Tensile Strength: Ultimate (UTS), MPa 320
230
Tensile Strength: Yield (Proof), MPa 160
150

Thermal Properties

Latent Heat of Fusion, J/g 190
180
Maximum Temperature: Mechanical, °C 170
160
Melting Completion (Liquidus), °C 1000
960
Melting Onset (Solidus), °C 850
820
Specific Heat Capacity, J/kg-K 370
360
Thermal Conductivity, W/m-K 75
64
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 11
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 35
37
Density, g/cm3 8.7
8.6
Embodied Carbon, kg CO2/kg material 3.6
4.1
Embodied Energy, MJ/kg 59
67
Embodied Water, L/kg 390
420

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
14
Resilience: Unit (Modulus of Resilience), kJ/m3 110
100
Stiffness to Weight: Axial, points 6.9
6.8
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 10
7.5
Strength to Weight: Bending, points 12
9.7
Thermal Diffusivity, mm2/s 23
20
Thermal Shock Resistance, points 12
8.8

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.0050
Antimony (Sb), % 0 to 0.2
0 to 0.2
Copper (Cu), % 86 to 89
84 to 86
Iron (Fe), % 0 to 0.2
0 to 0.1
Lead (Pb), % 0 to 0.3
0 to 0.2
Nickel (Ni), % 0 to 1.0
0 to 0.8
Phosphorus (P), % 0 to 1.5
0 to 1.5
Silicon (Si), % 0 to 0.0050
0 to 0.0050
Sulfur (S), % 0 to 0.050
0 to 0.050
Tin (Sn), % 9.0 to 11
14 to 16
Zinc (Zn), % 1.0 to 3.0
0 to 1.5
Residuals, % 0
0 to 0.6