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C91100 Bronze vs. C87900 Brass

Both C91100 bronze and C87900 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 67% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is C91100 bronze and the bottom bar is C87900 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 2.0
25
Poisson's Ratio 0.34
0.31
Shear Modulus, GPa 39
41
Tensile Strength: Ultimate (UTS), MPa 240
480
Tensile Strength: Yield (Proof), MPa 170
240

Thermal Properties

Latent Heat of Fusion, J/g 180
190
Maximum Temperature: Mechanical, °C 160
130
Melting Completion (Liquidus), °C 950
930
Melting Onset (Solidus), °C 820
900
Specific Heat Capacity, J/kg-K 360
390
Thermal Conductivity, W/m-K 63
120
Thermal Expansion, µm/m-K 18
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
15
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
17

Otherwise Unclassified Properties

Base Metal Price, % relative 38
24
Density, g/cm3 8.7
8.1
Embodied Carbon, kg CO2/kg material 4.2
2.7
Embodied Energy, MJ/kg 69
46
Embodied Water, L/kg 440
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4
100
Resilience: Unit (Modulus of Resilience), kJ/m3 140
270
Stiffness to Weight: Axial, points 6.7
7.3
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 7.7
17
Strength to Weight: Bending, points 9.9
17
Thermal Diffusivity, mm2/s 20
37
Thermal Shock Resistance, points 9.1
16

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.15
Antimony (Sb), % 0 to 0.2
0 to 0.050
Arsenic (As), % 0
0 to 0.050
Copper (Cu), % 82 to 85
63 to 69.2
Iron (Fe), % 0 to 0.25
0 to 0.4
Lead (Pb), % 0 to 0.25
0 to 0.25
Manganese (Mn), % 0
0 to 0.15
Nickel (Ni), % 0 to 0.5
0 to 0.5
Phosphorus (P), % 0 to 1.0
0 to 0.010
Silicon (Si), % 0 to 0.0050
0.8 to 1.2
Sulfur (S), % 0 to 0.050
0 to 0.050
Tin (Sn), % 15 to 17
0 to 0.25
Zinc (Zn), % 0 to 0.25
30 to 36