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C85700 Brass vs. C87600 Bronze

Both C85700 brass and C87600 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 67% of their average alloy composition in common.

For each property being compared, the top bar is C85700 brass and the bottom bar is C87600 bronze.

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 310
470
Tensile Strength: Yield (Proof), MPa 110
230

Thermal Properties

Latent Heat of Fusion, J/g 170
280
Maximum Temperature: Mechanical, °C 120
190
Melting Completion (Liquidus), °C 940
970
Melting Onset (Solidus), °C 910
860
Specific Heat Capacity, J/kg-K 380
410
Thermal Conductivity, W/m-K 84
28
Thermal Expansion, µm/m-K 21
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 22
6.0
Electrical Conductivity: Equal Weight (Specific), % IACS 25
6.4

Otherwise Unclassified Properties

Base Metal Price, % relative 24
29
Density, g/cm3 8.0
8.5
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 47
43
Embodied Water, L/kg 330
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
71
Resilience: Unit (Modulus of Resilience), kJ/m3 59
240
Stiffness to Weight: Axial, points 7.2
7.4
Stiffness to Weight: Bending, points 20
19
Strength to Weight: Axial, points 11
16
Strength to Weight: Bending, points 13
16
Thermal Diffusivity, mm2/s 27
8.1
Thermal Shock Resistance, points 10
17

Alloy Composition


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Aluminum (Al), % 0 to 0.8
0
Copper (Cu), % 58 to 64
88 to 92.5
Iron (Fe), % 0 to 0.7
0
Lead (Pb), % 0.8 to 1.5
0 to 0.5
Nickel (Ni), % 0 to 1.0
0
Silicon (Si), % 0 to 0.050
3.5 to 5.5
Tin (Sn), % 0.5 to 1.5
0
Zinc (Zn), % 32 to 40
4.0 to 7.0
Residuals, % 0 to 1.3
0 to 0.5