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C92700 Bronze vs. C87800 Brass

Both C92700 bronze and C87800 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 83% of their average alloy composition in common.

For each property being compared, the top bar is C92700 bronze and the bottom bar is C87800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 9.1
25
Poisson's Ratio 0.34
0.33
Rockwell B Hardness 77
86
Shear Modulus, GPa 40
42
Tensile Strength: Ultimate (UTS), MPa 290
590
Tensile Strength: Yield (Proof), MPa 150
350

Thermal Properties

Latent Heat of Fusion, J/g 190
260
Maximum Temperature: Mechanical, °C 170
170
Melting Completion (Liquidus), °C 980
920
Melting Onset (Solidus), °C 840
820
Specific Heat Capacity, J/kg-K 370
410
Thermal Conductivity, W/m-K 47
28
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 11
7.3

Otherwise Unclassified Properties

Base Metal Price, % relative 35
27
Density, g/cm3 8.7
8.3
Embodied Carbon, kg CO2/kg material 3.6
2.7
Embodied Energy, MJ/kg 58
44
Embodied Water, L/kg 390
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
130
Resilience: Unit (Modulus of Resilience), kJ/m3 110
540
Stiffness to Weight: Axial, points 6.8
7.4
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 9.1
20
Strength to Weight: Bending, points 11
19
Thermal Diffusivity, mm2/s 15
8.3
Thermal Shock Resistance, points 11
21

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.15
Antimony (Sb), % 0 to 0.25
0 to 0.050
Arsenic (As), % 0
0 to 0.050
Copper (Cu), % 86 to 89
80 to 84.2
Iron (Fe), % 0 to 0.2
0 to 0.15
Lead (Pb), % 1.0 to 2.5
0 to 0.15
Magnesium (Mg), % 0
0 to 0.010
Manganese (Mn), % 0
0 to 0.15
Nickel (Ni), % 0 to 1.0
0 to 0.2
Phosphorus (P), % 0 to 1.5
0 to 0.010
Silicon (Si), % 0 to 0.0050
3.8 to 4.2
Sulfur (S), % 0 to 0.050
0 to 0.050
Tin (Sn), % 9.0 to 11
0 to 0.25
Zinc (Zn), % 0 to 0.7
12 to 16
Residuals, % 0
0 to 0.5