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C90500 Gun Metal vs. C86100 Bronze

Both C90500 gun metal and C86100 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 69% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is C90500 gun metal and the bottom bar is C86100 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
0.32
Shear Modulus, GPa 40
43
Tensile Strength: Ultimate (UTS), MPa 320
660
Tensile Strength: Yield (Proof), MPa 160
350

Thermal Properties

Latent Heat of Fusion, J/g 190
200
Maximum Temperature: Mechanical, °C 170
170
Melting Completion (Liquidus), °C 1000
940
Melting Onset (Solidus), °C 850
900
Specific Heat Capacity, J/kg-K 370
420
Thermal Conductivity, W/m-K 75
35
Thermal Expansion, µm/m-K 18
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 11
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 35
24
Density, g/cm3 8.7
8.0
Embodied Carbon, kg CO2/kg material 3.6
2.9
Embodied Energy, MJ/kg 59
49
Embodied Water, L/kg 390
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
110
Resilience: Unit (Modulus of Resilience), kJ/m3 110
530
Stiffness to Weight: Axial, points 6.9
7.8
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 10
23
Strength to Weight: Bending, points 12
21
Thermal Diffusivity, mm2/s 23
10
Thermal Shock Resistance, points 12
21

Alloy Composition

Aluminum (Al), % 0 to 0.0050
4.5 to 5.5
Antimony (Sb), % 0 to 0.2
0
Copper (Cu), % 86 to 89
66 to 68
Iron (Fe), % 0 to 0.2
2.0 to 4.0
Lead (Pb), % 0 to 0.3
0 to 0.1
Manganese (Mn), % 0
2.5 to 5.0
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 1.5
0
Silicon (Si), % 0 to 0.0050
0
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 9.0 to 11
0 to 0.1
Zinc (Zn), % 1.0 to 3.0
17.3 to 25
Residuals, % 0 to 0.3
0