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C83800 Bronze vs. C90500 Gun Metal

Both C83800 bronze and C90500 gun metal are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 90% 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 C83800 bronze and the bottom bar is C90500 gun metal.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 20
20
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 39
40
Tensile Strength: Ultimate (UTS), MPa 230
320
Tensile Strength: Yield (Proof), MPa 110
160

Thermal Properties

Latent Heat of Fusion, J/g 180
190
Maximum Temperature: Mechanical, °C 160
170
Melting Completion (Liquidus), °C 1000
1000
Melting Onset (Solidus), °C 840
850
Specific Heat Capacity, J/kg-K 370
370
Thermal Conductivity, W/m-K 72
75
Thermal Expansion, µm/m-K 19
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
11
Electrical Conductivity: Equal Weight (Specific), % IACS 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 30
35
Density, g/cm3 8.8
8.7
Embodied Carbon, kg CO2/kg material 2.9
3.6
Embodied Energy, MJ/kg 47
59
Embodied Water, L/kg 340
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 39
54
Resilience: Unit (Modulus of Resilience), kJ/m3 53
110
Stiffness to Weight: Axial, points 6.6
6.9
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 7.4
10
Strength to Weight: Bending, points 9.6
12
Thermal Diffusivity, mm2/s 22
23
Thermal Shock Resistance, points 8.6
12

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.0050
Antimony (Sb), % 0 to 0.25
0 to 0.2
Copper (Cu), % 82 to 83.8
86 to 89
Iron (Fe), % 0 to 0.3
0 to 0.2
Lead (Pb), % 5.0 to 7.0
0 to 0.3
Nickel (Ni), % 0 to 1.0
0 to 1.0
Phosphorus (P), % 0 to 1.5
0 to 1.5
Silicon (Si), % 0 to 0.0050
0 to 0.0050
Sulfur (S), % 0 to 0.080
0 to 0.050
Tin (Sn), % 3.3 to 4.2
9.0 to 11
Zinc (Zn), % 5.0 to 8.0
1.0 to 3.0
Residuals, % 0
0 to 0.3