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C87400 Brass vs. C87600 Bronze

Both C87400 brass and C87600 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is C87400 brass and the bottom bar is C87600 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 21
18
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 41
42
Tensile Strength: Ultimate (UTS), MPa 390
470
Tensile Strength: Yield (Proof), MPa 160
230

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 170
190
Melting Completion (Liquidus), °C 920
970
Melting Onset (Solidus), °C 820
860
Specific Heat Capacity, J/kg-K 400
410
Thermal Conductivity, W/m-K 28
28
Thermal Expansion, µm/m-K 18
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
6.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
6.4

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
43
Embodied Water, L/kg 310
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65
71
Resilience: Unit (Modulus of Resilience), kJ/m3 120
240
Stiffness to Weight: Axial, points 7.4
7.4
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 13
16
Strength to Weight: Bending, points 14
16
Thermal Diffusivity, mm2/s 8.3
8.1
Thermal Shock Resistance, points 14
17

Alloy Composition

Aluminum (Al), % 0 to 0.8
0
Copper (Cu), % 79 to 85.5
88 to 92.5
Lead (Pb), % 0 to 1.0
0 to 0.5
Silicon (Si), % 2.5 to 4.0
3.5 to 5.5
Zinc (Zn), % 12 to 16
4.0 to 7.0
Residuals, % 0
0 to 0.5