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C87500 Brass vs. C87700 Bronze

Both C87500 brass and C87700 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 93% of their average alloy composition in common.

For each property being compared, the top bar is C87500 brass and the bottom bar is C87700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 18
3.6
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 42
42
Tensile Strength: Ultimate (UTS), MPa 460
300
Tensile Strength: Yield (Proof), MPa 190
120

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 170
180
Melting Completion (Liquidus), °C 920
980
Melting Onset (Solidus), °C 820
900
Specific Heat Capacity, J/kg-K 410
400
Thermal Conductivity, W/m-K 28
120
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
45
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
48

Otherwise Unclassified Properties

Base Metal Price, % relative 27
29
Density, g/cm3 8.3
8.5
Embodied Carbon, kg CO2/kg material 2.7
2.7
Embodied Energy, MJ/kg 44
45
Embodied Water, L/kg 300
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67
8.6
Resilience: Unit (Modulus of Resilience), kJ/m3 160
64
Stiffness to Weight: Axial, points 7.4
7.4
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 16
9.8
Strength to Weight: Bending, points 16
12
Thermal Diffusivity, mm2/s 8.3
34
Thermal Shock Resistance, points 17
11

Alloy Composition

Aluminum (Al), % 0 to 0.5
0
Antimony (Sb), % 0
0 to 0.1
Copper (Cu), % 79 to 85
87.5 to 90.5
Iron (Fe), % 0
0 to 0.5
Lead (Pb), % 0 to 0.5
0 to 0.090
Manganese (Mn), % 0
0 to 0.8
Nickel (Ni), % 0
0 to 0.25
Phosphorus (P), % 0
0 to 0.15
Silicon (Si), % 3.0 to 5.0
2.5 to 3.5
Tin (Sn), % 0
0 to 2.0
Zinc (Zn), % 12 to 16
7.0 to 9.0
Residuals, % 0
0 to 0.8