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C90500 Gun Metal vs. C90200 Bronze

Both C90500 gun metal and C90200 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 96% 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 C90200 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 20
30
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 40
41
Tensile Strength: Ultimate (UTS), MPa 320
260
Tensile Strength: Yield (Proof), MPa 160
110

Thermal Properties

Latent Heat of Fusion, J/g 190
200
Maximum Temperature: Mechanical, °C 170
180
Melting Completion (Liquidus), °C 1000
1050
Melting Onset (Solidus), °C 850
880
Specific Heat Capacity, J/kg-K 370
370
Thermal Conductivity, W/m-K 75
62
Thermal Expansion, µm/m-K 18
18

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 35
34
Density, g/cm3 8.7
8.8
Embodied Carbon, kg CO2/kg material 3.6
3.3
Embodied Energy, MJ/kg 59
53
Embodied Water, L/kg 390
370

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
63
Resilience: Unit (Modulus of Resilience), kJ/m3 110
55
Stiffness to Weight: Axial, points 6.9
7.0
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 10
8.3
Strength to Weight: Bending, points 12
10
Thermal Diffusivity, mm2/s 23
19
Thermal Shock Resistance, points 12
9.5

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
91 to 94
Iron (Fe), % 0 to 0.2
0 to 0.2
Lead (Pb), % 0 to 0.3
0 to 0.3
Nickel (Ni), % 0 to 1.0
0 to 0.5
Phosphorus (P), % 0 to 1.5
0 to 0.050
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
6.0 to 8.0
Zinc (Zn), % 1.0 to 3.0
0 to 0.5
Residuals, % 0
0 to 0.6