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C84200 Brass vs. C87700 Bronze

Both C84200 brass and C87700 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 90% of their average alloy composition in common.

For each property being compared, the top bar is C84200 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, % 15
3.6
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 40
42
Tensile Strength: Ultimate (UTS), MPa 250
300
Tensile Strength: Yield (Proof), MPa 120
120

Thermal Properties

Latent Heat of Fusion, J/g 180
250
Maximum Temperature: Mechanical, °C 150
180
Melting Completion (Liquidus), °C 990
980
Melting Onset (Solidus), °C 840
900
Specific Heat Capacity, J/kg-K 370
400
Thermal Conductivity, W/m-K 72
120
Thermal Expansion, µm/m-K 19
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
45
Electrical Conductivity: Equal Weight (Specific), % IACS 17
48

Otherwise Unclassified Properties

Base Metal Price, % relative 30
29
Density, g/cm3 8.5
8.5
Embodied Carbon, kg CO2/kg material 3.1
2.7
Embodied Energy, MJ/kg 51
45
Embodied Water, L/kg 350
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
8.6
Resilience: Unit (Modulus of Resilience), kJ/m3 72
64
Stiffness to Weight: Axial, points 6.9
7.4
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 8.2
9.8
Strength to Weight: Bending, points 10
12
Thermal Diffusivity, mm2/s 23
34
Thermal Shock Resistance, points 9.1
11

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.25
0 to 0.1
Copper (Cu), % 78 to 82
87.5 to 90.5
Iron (Fe), % 0 to 0.4
0 to 0.5
Lead (Pb), % 2.0 to 3.0
0 to 0.090
Manganese (Mn), % 0
0 to 0.8
Nickel (Ni), % 0 to 0.8
0 to 0.25
Phosphorus (P), % 0 to 1.5
0 to 0.15
Silicon (Si), % 0 to 0.0050
2.5 to 3.5
Sulfur (S), % 0 to 0.080
0
Tin (Sn), % 4.0 to 6.0
0 to 2.0
Zinc (Zn), % 10 to 16
7.0 to 9.0
Residuals, % 0
0 to 0.8