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C28500 Muntz Metal vs. C67400 Bronze

Both C28500 Muntz Metal and C67400 bronze are copper alloys. They have a moderately high 94% of their average alloy composition in common.

For each property being compared, the top bar is C28500 Muntz Metal and the bottom bar is C67400 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 20
22 to 28
Poisson's Ratio 0.3
0.31
Rockwell B Hardness 150
78 to 85
Shear Modulus, GPa 40
41
Shear Strength, MPa 320
310 to 350
Tensile Strength: Ultimate (UTS), MPa 520
480 to 610
Tensile Strength: Yield (Proof), MPa 380
250 to 370

Thermal Properties

Latent Heat of Fusion, J/g 170
190
Maximum Temperature: Mechanical, °C 110
130
Melting Completion (Liquidus), °C 900
890
Melting Onset (Solidus), °C 890
870
Specific Heat Capacity, J/kg-K 390
400
Thermal Conductivity, W/m-K 100
100
Thermal Expansion, µm/m-K 21
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29
23
Electrical Conductivity: Equal Weight (Specific), % IACS 33
26

Otherwise Unclassified Properties

Base Metal Price, % relative 22
23
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.7
2.8
Embodied Energy, MJ/kg 46
48
Embodied Water, L/kg 320
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 94
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 700
300 to 660
Stiffness to Weight: Axial, points 7.3
7.5
Stiffness to Weight: Bending, points 20
20
Strength to Weight: Axial, points 18
17 to 22
Strength to Weight: Bending, points 18
17 to 20
Thermal Diffusivity, mm2/s 33
32
Thermal Shock Resistance, points 17
16 to 20

Alloy Composition

Aluminum (Al), % 0
0.5 to 2.0
Copper (Cu), % 57 to 59
57 to 60
Iron (Fe), % 0 to 0.35
0 to 0.35
Lead (Pb), % 0 to 0.25
0 to 0.5
Manganese (Mn), % 0
2.0 to 3.5
Nickel (Ni), % 0
0 to 0.25
Silicon (Si), % 0
0.5 to 1.5
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 39.5 to 43
31.1 to 40
Residuals, % 0
0 to 0.5