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C21000 Brass vs. C90500 Gun Metal

Both C21000 brass and C90500 gun metal are copper alloys. They have 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 (6, in this case) are not shown.

For each property being compared, the top bar is C21000 brass and the bottom bar is C90500 gun metal.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 2.9 to 50
20
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 43
40
Tensile Strength: Ultimate (UTS), MPa 240 to 450
320
Tensile Strength: Yield (Proof), MPa 69 to 440
160

Thermal Properties

Latent Heat of Fusion, J/g 200
190
Maximum Temperature: Mechanical, °C 190
170
Melting Completion (Liquidus), °C 1070
1000
Melting Onset (Solidus), °C 1050
850
Specific Heat Capacity, J/kg-K 390
370
Thermal Conductivity, W/m-K 230
75
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
11
Electrical Conductivity: Equal Weight (Specific), % IACS 57
11

Otherwise Unclassified Properties

Base Metal Price, % relative 30
35
Density, g/cm3 8.8
8.7
Embodied Carbon, kg CO2/kg material 2.6
3.6
Embodied Energy, MJ/kg 42
59
Embodied Water, L/kg 310
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 100
54
Resilience: Unit (Modulus of Resilience), kJ/m3 21 to 830
110
Stiffness to Weight: Axial, points 7.2
6.9
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 7.4 to 14
10
Strength to Weight: Bending, points 9.6 to 15
12
Thermal Diffusivity, mm2/s 69
23
Thermal Shock Resistance, points 8.1 to 15
12

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Copper (Cu), % 94 to 96
86 to 89
Iron (Fe), % 0 to 0.050
0 to 0.2
Lead (Pb), % 0 to 0.030
0 to 0.3
Nickel (Ni), % 0
0 to 1.0
Phosphorus (P), % 0
0 to 1.5
Silicon (Si), % 0
0 to 0.0050
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
9.0 to 11
Zinc (Zn), % 3.7 to 6.0
1.0 to 3.0
Residuals, % 0
0 to 0.3