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C87400 Brass vs. C95820 Bronze

Both C87400 brass and C95820 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 81% of their average alloy composition in common.

For each property being compared, the top bar is C87400 brass and the bottom bar is C95820 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Elongation at Break, % 21
15
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 41
44
Tensile Strength: Ultimate (UTS), MPa 390
730
Tensile Strength: Yield (Proof), MPa 160
310

Thermal Properties

Latent Heat of Fusion, J/g 250
230
Maximum Temperature: Mechanical, °C 170
230
Melting Completion (Liquidus), °C 920
1080
Melting Onset (Solidus), °C 820
1020
Specific Heat Capacity, J/kg-K 400
440
Thermal Conductivity, W/m-K 28
38
Thermal Expansion, µm/m-K 18
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 27
29
Density, g/cm3 8.3
8.3
Embodied Carbon, kg CO2/kg material 2.7
3.5
Embodied Energy, MJ/kg 44
56
Embodied Water, L/kg 310
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65
86
Resilience: Unit (Modulus of Resilience), kJ/m3 120
400
Stiffness to Weight: Axial, points 7.4
8.0
Stiffness to Weight: Bending, points 19
20
Strength to Weight: Axial, points 13
24
Strength to Weight: Bending, points 14
22
Thermal Diffusivity, mm2/s 8.3
11
Thermal Shock Resistance, points 14
25

Alloy Composition


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Aluminum (Al), % 0 to 0.8
9.0 to 10
Copper (Cu), % 79 to 85.5
77.5 to 82.5
Iron (Fe), % 0
4.0 to 5.0
Lead (Pb), % 0 to 1.0
0 to 0.020
Manganese (Mn), % 0
0 to 1.5
Nickel (Ni), % 0
4.5 to 5.8
Silicon (Si), % 2.5 to 4.0
0 to 0.1
Tin (Sn), % 0
0 to 0.020
Zinc (Zn), % 12 to 16
0 to 0.2
Residuals, % 0 to 0.8
0 to 0.8