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C90500 Gun Metal vs. C42500 Brass

Both C90500 gun metal and C42500 brass are copper alloys. They have a moderately high 92% 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 C90500 gun metal and the bottom bar is C42500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 20
2.0 to 49
Poisson's Ratio 0.34
0.33
Shear Modulus, GPa 40
42
Tensile Strength: Ultimate (UTS), MPa 320
310 to 630
Tensile Strength: Yield (Proof), MPa 160
120 to 590

Thermal Properties

Latent Heat of Fusion, J/g 190
200
Maximum Temperature: Mechanical, °C 170
180
Melting Completion (Liquidus), °C 1000
1030
Melting Onset (Solidus), °C 850
1010
Specific Heat Capacity, J/kg-K 370
380
Thermal Conductivity, W/m-K 75
120
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
28
Electrical Conductivity: Equal Weight (Specific), % IACS 11
29

Otherwise Unclassified Properties

Base Metal Price, % relative 35
30
Density, g/cm3 8.7
8.7
Embodied Carbon, kg CO2/kg material 3.6
2.8
Embodied Energy, MJ/kg 59
46
Embodied Water, L/kg 390
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
12 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 110
64 to 1570
Stiffness to Weight: Axial, points 6.9
7.1
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 10
9.9 to 20
Strength to Weight: Bending, points 12
12 to 19
Thermal Diffusivity, mm2/s 23
36
Thermal Shock Resistance, points 12
11 to 22

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.2
0
Copper (Cu), % 86 to 89
87 to 90
Iron (Fe), % 0 to 0.2
0 to 0.050
Lead (Pb), % 0 to 0.3
0 to 0.050
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 1.5
0 to 0.35
Silicon (Si), % 0 to 0.0050
0
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 9.0 to 11
1.5 to 3.0
Zinc (Zn), % 1.0 to 3.0
6.1 to 11.5
Residuals, % 0
0 to 0.5