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C86400 Bronze vs. C87500 Brass

Both C86400 bronze and C87500 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 74% of their average alloy composition in common.

For each property being compared, the top bar is C86400 bronze and the bottom bar is C87500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 17
18
Poisson's Ratio 0.31
0.33
Shear Modulus, GPa 40
42
Tensile Strength: Ultimate (UTS), MPa 470
460
Tensile Strength: Yield (Proof), MPa 150
190

Thermal Properties

Latent Heat of Fusion, J/g 170
260
Maximum Temperature: Mechanical, °C 120
170
Melting Completion (Liquidus), °C 880
920
Melting Onset (Solidus), °C 860
820
Specific Heat Capacity, J/kg-K 390
410
Thermal Conductivity, W/m-K 88
28
Thermal Expansion, µm/m-K 21
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 19
6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 22
7.3

Otherwise Unclassified Properties

Base Metal Price, % relative 23
27
Density, g/cm3 7.9
8.3
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 48
44
Embodied Water, L/kg 330
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 63
67
Resilience: Unit (Modulus of Resilience), kJ/m3 110
160
Stiffness to Weight: Axial, points 7.3
7.4
Stiffness to Weight: Bending, points 20
19
Strength to Weight: Axial, points 16
16
Strength to Weight: Bending, points 17
16
Thermal Diffusivity, mm2/s 29
8.3
Thermal Shock Resistance, points 16
17

Alloy Composition

Aluminum (Al), % 0.5 to 1.5
0 to 0.5
Copper (Cu), % 56 to 62
79 to 85
Iron (Fe), % 0.4 to 2.0
0
Lead (Pb), % 0.5 to 1.5
0 to 0.5
Manganese (Mn), % 0.1 to 1.0
0
Nickel (Ni), % 0 to 1.0
0
Silicon (Si), % 0
3.0 to 5.0
Tin (Sn), % 0.5 to 1.5
0
Zinc (Zn), % 34 to 42
12 to 16
Residuals, % 0
0 to 0.5