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C90500 Gun Metal vs. CC331G Bronze

Both C90500 gun metal and CC331G bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 86% 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 CC331G bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 20
20
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 40
43
Tensile Strength: Ultimate (UTS), MPa 320
620
Tensile Strength: Yield (Proof), MPa 160
240

Thermal Properties

Latent Heat of Fusion, J/g 190
230
Maximum Temperature: Mechanical, °C 170
220
Melting Completion (Liquidus), °C 1000
1060
Melting Onset (Solidus), °C 850
1000
Specific Heat Capacity, J/kg-K 370
440
Thermal Conductivity, W/m-K 75
61
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
13
Electrical Conductivity: Equal Weight (Specific), % IACS 11
14

Otherwise Unclassified Properties

Base Metal Price, % relative 35
28
Density, g/cm3 8.7
8.3
Embodied Carbon, kg CO2/kg material 3.6
3.2
Embodied Energy, MJ/kg 59
53
Embodied Water, L/kg 390
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
97
Resilience: Unit (Modulus of Resilience), kJ/m3 110
250
Stiffness to Weight: Axial, points 6.9
7.6
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 10
21
Strength to Weight: Bending, points 12
19
Thermal Diffusivity, mm2/s 23
17
Thermal Shock Resistance, points 12
22

Alloy Composition

Aluminum (Al), % 0 to 0.0050
8.5 to 10.5
Antimony (Sb), % 0 to 0.2
0
Copper (Cu), % 86 to 89
83 to 86.5
Iron (Fe), % 0 to 0.2
1.5 to 3.5
Lead (Pb), % 0 to 0.3
0 to 0.1
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0 to 1.0
0 to 1.5
Phosphorus (P), % 0 to 1.5
0
Silicon (Si), % 0 to 0.0050
0 to 0.2
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 9.0 to 11
0 to 0.2
Zinc (Zn), % 1.0 to 3.0
0 to 0.5
Residuals, % 0 to 0.3
0