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C90500 Gun Metal vs. C94500 Bronze

Both C90500 gun metal and C94500 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 81% 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 C94500 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
92
Elongation at Break, % 20
12
Poisson's Ratio 0.34
0.36
Shear Modulus, GPa 40
34
Tensile Strength: Ultimate (UTS), MPa 320
170
Tensile Strength: Yield (Proof), MPa 160
83

Thermal Properties

Latent Heat of Fusion, J/g 190
160
Maximum Temperature: Mechanical, °C 170
130
Melting Completion (Liquidus), °C 1000
940
Melting Onset (Solidus), °C 850
800
Specific Heat Capacity, J/kg-K 370
330
Thermal Conductivity, W/m-K 75
52
Thermal Expansion, µm/m-K 18
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
10
Electrical Conductivity: Equal Weight (Specific), % IACS 11
9.7

Otherwise Unclassified Properties

Base Metal Price, % relative 35
30
Density, g/cm3 8.7
9.3
Embodied Carbon, kg CO2/kg material 3.6
3.2
Embodied Energy, MJ/kg 59
51
Embodied Water, L/kg 390
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
17
Resilience: Unit (Modulus of Resilience), kJ/m3 110
37
Stiffness to Weight: Axial, points 6.9
5.5
Stiffness to Weight: Bending, points 18
16
Strength to Weight: Axial, points 10
5.2
Strength to Weight: Bending, points 12
7.4
Thermal Diffusivity, mm2/s 23
17
Thermal Shock Resistance, points 12
6.7

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.0050
Antimony (Sb), % 0 to 0.2
0 to 0.8
Copper (Cu), % 86 to 89
66.7 to 78
Iron (Fe), % 0 to 0.2
0 to 0.15
Lead (Pb), % 0 to 0.3
16 to 22
Nickel (Ni), % 0 to 1.0
0 to 1.0
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 0.080
Tin (Sn), % 9.0 to 11
6.0 to 8.0
Zinc (Zn), % 1.0 to 3.0
0 to 1.2
Residuals, % 0 to 0.3
0