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C90500 Gun Metal vs. C91700 Bronze

Both C90500 gun metal and C91700 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 C91700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 20
13
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 40
41
Tensile Strength: Ultimate (UTS), MPa 320
330
Tensile Strength: Yield (Proof), MPa 160
170

Thermal Properties

Latent Heat of Fusion, J/g 190
190
Maximum Temperature: Mechanical, °C 170
170
Melting Completion (Liquidus), °C 1000
1020
Melting Onset (Solidus), °C 850
850
Specific Heat Capacity, J/kg-K 370
370
Thermal Conductivity, W/m-K 75
71
Thermal Expansion, µm/m-K 18
18

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 35
36
Density, g/cm3 8.7
8.7
Embodied Carbon, kg CO2/kg material 3.6
3.9
Embodied Energy, MJ/kg 59
63
Embodied Water, L/kg 390
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
35
Resilience: Unit (Modulus of Resilience), kJ/m3 110
140
Stiffness to Weight: Axial, points 6.9
6.9
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 10
11
Strength to Weight: Bending, points 12
12
Thermal Diffusivity, mm2/s 23
22
Thermal Shock Resistance, points 12
12

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
84.2 to 87.5
Iron (Fe), % 0 to 0.2
0 to 0.2
Lead (Pb), % 0 to 0.3
0 to 0.25
Nickel (Ni), % 0 to 1.0
1.2 to 2.0
Phosphorus (P), % 0 to 1.5
0 to 0.3
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
11.3 to 12.5
Zinc (Zn), % 1.0 to 3.0
0 to 0.25
Residuals, % 0 to 0.3
0