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C38500 Bronze vs. C68700 Brass

Both C38500 bronze and C68700 brass are copper alloys. They have 77% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is C38500 bronze and the bottom bar is C68700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Poisson's Ratio 0.31
0.32
Shear Modulus, GPa 37
41
Tensile Strength: Ultimate (UTS), MPa 370
390
Tensile Strength: Yield (Proof), MPa 130
140

Thermal Properties

Latent Heat of Fusion, J/g 160
190
Maximum Temperature: Mechanical, °C 110
160
Melting Completion (Liquidus), °C 890
970
Melting Onset (Solidus), °C 880
930
Specific Heat Capacity, J/kg-K 380
400
Thermal Conductivity, W/m-K 120
100
Thermal Expansion, µm/m-K 21
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
23
Electrical Conductivity: Equal Weight (Specific), % IACS 31
25

Otherwise Unclassified Properties

Base Metal Price, % relative 22
26
Density, g/cm3 8.1
8.3
Embodied Carbon, kg CO2/kg material 2.6
2.8
Embodied Energy, MJ/kg 45
46
Embodied Water, L/kg 320
340

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 78
90
Stiffness to Weight: Axial, points 7.0
7.3
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 13
13
Strength to Weight: Bending, points 14
14
Thermal Diffusivity, mm2/s 40
30
Thermal Shock Resistance, points 12
13

Alloy Composition

Aluminum (Al), % 0
1.8 to 2.5
Arsenic (As), % 0
0.020 to 0.1
Copper (Cu), % 55 to 59
76 to 79
Iron (Fe), % 0 to 0.35
0 to 0.060
Lead (Pb), % 2.5 to 3.5
0 to 0.070
Zinc (Zn), % 36.7 to 42.5
17.8 to 22.2
Residuals, % 0
0 to 0.5