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C90500 Gun Metal vs. C93400 Bronze

Both C90500 gun metal and C93400 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 94% 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 C93400 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 20
9.1
Poisson's Ratio 0.34
0.35
Shear Modulus, GPa 40
38
Tensile Strength: Ultimate (UTS), MPa 320
270
Tensile Strength: Yield (Proof), MPa 160
150

Thermal Properties

Latent Heat of Fusion, J/g 190
180
Maximum Temperature: Mechanical, °C 170
150
Melting Completion (Liquidus), °C 1000
950
Melting Onset (Solidus), °C 850
850
Specific Heat Capacity, J/kg-K 370
350
Thermal Conductivity, W/m-K 75
58
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
12
Electrical Conductivity: Equal Weight (Specific), % IACS 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 35
32
Density, g/cm3 8.7
8.9
Embodied Carbon, kg CO2/kg material 3.6
3.3
Embodied Energy, MJ/kg 59
54
Embodied Water, L/kg 390
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
21
Resilience: Unit (Modulus of Resilience), kJ/m3 110
120
Stiffness to Weight: Axial, points 6.9
6.3
Stiffness to Weight: Bending, points 18
17
Strength to Weight: Axial, points 10
8.3
Strength to Weight: Bending, points 12
10
Thermal Diffusivity, mm2/s 23
18
Thermal Shock Resistance, points 12
10

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.0050
Antimony (Sb), % 0 to 0.2
0 to 0.5
Copper (Cu), % 86 to 89
82 to 85
Iron (Fe), % 0 to 0.2
0 to 0.2
Lead (Pb), % 0 to 0.3
7.0 to 9.0
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 0.050
0 to 0.080
Tin (Sn), % 9.0 to 11
7.0 to 9.0
Zinc (Zn), % 1.0 to 3.0
0 to 0.8
Residuals, % 0
0 to 1.0