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C38500 Bronze vs. C69710 Brass

Both C38500 bronze and C69710 brass are copper alloys. They have 76% of their average alloy composition in common.

For each property being compared, the top bar is C38500 bronze and the bottom bar is C69710 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 17
25
Poisson's Ratio 0.31
0.32
Shear Modulus, GPa 37
41
Shear Strength, MPa 230
300
Tensile Strength: Ultimate (UTS), MPa 370
470
Tensile Strength: Yield (Proof), MPa 130
230

Thermal Properties

Latent Heat of Fusion, J/g 160
240
Maximum Temperature: Mechanical, °C 110
160
Melting Completion (Liquidus), °C 890
930
Melting Onset (Solidus), °C 880
880
Specific Heat Capacity, J/kg-K 380
400
Thermal Conductivity, W/m-K 120
40
Thermal Expansion, µm/m-K 21
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 31
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 22
26
Density, g/cm3 8.1
8.3
Embodied Carbon, kg CO2/kg material 2.6
2.7
Embodied Energy, MJ/kg 45
44
Embodied Water, L/kg 320
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
99
Resilience: Unit (Modulus of Resilience), kJ/m3 78
250
Stiffness to Weight: Axial, points 7.0
7.3
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 40
12
Thermal Shock Resistance, points 12
16

Alloy Composition


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Arsenic (As), % 0
0.030 to 0.060
Copper (Cu), % 55 to 59
75 to 80
Iron (Fe), % 0 to 0.35
0 to 0.2
Lead (Pb), % 2.5 to 3.5
0.5 to 1.5
Manganese (Mn), % 0
0 to 0.4
Silicon (Si), % 0
2.5 to 3.5
Zinc (Zn), % 36.7 to 42.5
13.8 to 22
Residuals, % 0 to 0.5
0 to 0.5