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C90500 Gun Metal vs. C38000 Brass

Both C90500 gun metal and C38000 brass are copper alloys. They have 60% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is C90500 gun metal and the bottom bar is C38000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 20
17
Poisson's Ratio 0.34
0.31
Shear Modulus, GPa 40
39
Tensile Strength: Ultimate (UTS), MPa 320
380
Tensile Strength: Yield (Proof), MPa 160
120

Thermal Properties

Latent Heat of Fusion, J/g 190
170
Maximum Temperature: Mechanical, °C 170
110
Melting Completion (Liquidus), °C 1000
800
Melting Onset (Solidus), °C 850
760
Specific Heat Capacity, J/kg-K 370
380
Thermal Conductivity, W/m-K 75
110
Thermal Expansion, µm/m-K 18
21

Otherwise Unclassified Properties

Base Metal Price, % relative 35
22
Density, g/cm3 8.7
8.0
Embodied Carbon, kg CO2/kg material 3.6
2.7
Embodied Energy, MJ/kg 59
46
Embodied Water, L/kg 390
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
50
Resilience: Unit (Modulus of Resilience), kJ/m3 110
74
Stiffness to Weight: Axial, points 6.9
7.1
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 10
13
Strength to Weight: Bending, points 12
14
Thermal Diffusivity, mm2/s 23
37
Thermal Shock Resistance, points 12
13

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.5
Antimony (Sb), % 0 to 0.2
0
Copper (Cu), % 86 to 89
55 to 60
Iron (Fe), % 0 to 0.2
0 to 0.35
Lead (Pb), % 0 to 0.3
1.5 to 2.5
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 0.3
Zinc (Zn), % 1.0 to 3.0
35.9 to 43.5
Residuals, % 0
0 to 0.5