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C85800 Brass vs. C90500 Gun Metal

Both C85800 brass and C90500 gun metal are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 66% 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 C85800 brass 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, % 15
20
Poisson's Ratio 0.31
0.34
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 380
320
Tensile Strength: Yield (Proof), MPa 210
160

Thermal Properties

Latent Heat of Fusion, J/g 170
190
Maximum Temperature: Mechanical, °C 120
170
Melting Completion (Liquidus), °C 900
1000
Melting Onset (Solidus), °C 870
850
Specific Heat Capacity, J/kg-K 380
370
Thermal Conductivity, W/m-K 84
75
Thermal Expansion, µm/m-K 20
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 20
11
Electrical Conductivity: Equal Weight (Specific), % IACS 22
11

Otherwise Unclassified Properties

Base Metal Price, % relative 24
35
Density, g/cm3 8.0
8.7
Embodied Carbon, kg CO2/kg material 2.8
3.6
Embodied Energy, MJ/kg 47
59
Embodied Water, L/kg 330
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
54
Resilience: Unit (Modulus of Resilience), kJ/m3 210
110
Stiffness to Weight: Axial, points 7.2
6.9
Stiffness to Weight: Bending, points 20
18
Strength to Weight: Axial, points 13
10
Strength to Weight: Bending, points 15
12
Thermal Diffusivity, mm2/s 27
23
Thermal Shock Resistance, points 13
12

Alloy Composition

Aluminum (Al), % 0 to 0.55
0 to 0.0050
Antimony (Sb), % 0 to 0.050
0 to 0.2
Arsenic (As), % 0 to 0.050
0
Copper (Cu), % 57 to 69
86 to 89
Iron (Fe), % 0 to 0.5
0 to 0.2
Lead (Pb), % 0 to 1.5
0 to 0.3
Manganese (Mn), % 0 to 0.25
0
Nickel (Ni), % 0 to 0.5
0 to 1.0
Phosphorus (P), % 0 to 0.010
0 to 1.5
Silicon (Si), % 0 to 0.25
0 to 0.0050
Sulfur (S), % 0 to 0.050
0 to 0.050
Tin (Sn), % 0 to 1.5
9.0 to 11
Zinc (Zn), % 31 to 41
1.0 to 3.0
Residuals, % 0
0 to 0.3