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C87500 Brass vs. C86700 Bronze

Both C87500 brass and C86700 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 72% of their average alloy composition in common.

For each property being compared, the top bar is C87500 brass and the bottom bar is C86700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 18
17
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 42
41
Tensile Strength: Ultimate (UTS), MPa 460
630
Tensile Strength: Yield (Proof), MPa 190
250

Thermal Properties

Latent Heat of Fusion, J/g 260
180
Maximum Temperature: Mechanical, °C 170
130
Melting Completion (Liquidus), °C 920
880
Melting Onset (Solidus), °C 820
860
Specific Heat Capacity, J/kg-K 410
400
Thermal Conductivity, W/m-K 28
89
Thermal Expansion, µm/m-K 18
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
17
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
19

Otherwise Unclassified Properties

Base Metal Price, % relative 27
23
Density, g/cm3 8.3
7.9
Embodied Carbon, kg CO2/kg material 2.7
2.9
Embodied Energy, MJ/kg 44
49
Embodied Water, L/kg 300
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67
86
Resilience: Unit (Modulus of Resilience), kJ/m3 160
290
Stiffness to Weight: Axial, points 7.4
7.5
Stiffness to Weight: Bending, points 19
20
Strength to Weight: Axial, points 16
22
Strength to Weight: Bending, points 16
21
Thermal Diffusivity, mm2/s 8.3
28
Thermal Shock Resistance, points 17
21

Alloy Composition

Aluminum (Al), % 0 to 0.5
1.0 to 3.0
Copper (Cu), % 79 to 85
55 to 60
Iron (Fe), % 0
1.0 to 3.0
Lead (Pb), % 0 to 0.5
0.5 to 1.5
Manganese (Mn), % 0
1.0 to 3.5
Nickel (Ni), % 0
0 to 1.0
Silicon (Si), % 3.0 to 5.0
0
Tin (Sn), % 0
0 to 1.5
Zinc (Zn), % 12 to 16
30 to 38
Residuals, % 0
0 to 1.0