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C40500 Penny Bronze vs. C21000 Brass

Both C40500 penny bronze and C21000 brass are copper alloys. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is C40500 penny bronze and the bottom bar is C21000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 3.0 to 49
2.9 to 50
Poisson's Ratio 0.34
0.34
Rockwell B Hardness 46 to 82
36 to 73
Rockwell Superficial 30T Hardness 10 to 72
44 to 68
Shear Modulus, GPa 43
43
Shear Strength, MPa 210 to 310
180 to 280
Tensile Strength: Ultimate (UTS), MPa 270 to 540
240 to 450
Tensile Strength: Yield (Proof), MPa 79 to 520
69 to 440

Thermal Properties

Latent Heat of Fusion, J/g 200
200
Maximum Temperature: Mechanical, °C 190
190
Melting Completion (Liquidus), °C 1060
1070
Melting Onset (Solidus), °C 1020
1050
Specific Heat Capacity, J/kg-K 380
390
Thermal Conductivity, W/m-K 160
230
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
56
Electrical Conductivity: Equal Weight (Specific), % IACS 42
57

Otherwise Unclassified Properties

Base Metal Price, % relative 30
30
Density, g/cm3 8.8
8.8
Embodied Carbon, kg CO2/kg material 2.7
2.6
Embodied Energy, MJ/kg 43
42
Embodied Water, L/kg 320
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 110
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 28 to 1200
21 to 830
Stiffness to Weight: Axial, points 7.2
7.2
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 8.5 to 17
7.4 to 14
Strength to Weight: Bending, points 10 to 17
9.6 to 15
Thermal Diffusivity, mm2/s 48
69
Thermal Shock Resistance, points 9.5 to 19
8.1 to 15

Alloy Composition

Copper (Cu), % 94 to 96
94 to 96
Iron (Fe), % 0 to 0.050
0 to 0.050
Lead (Pb), % 0 to 0.050
0 to 0.030
Tin (Sn), % 0.7 to 1.3
0
Zinc (Zn), % 2.1 to 5.3
3.7 to 6.0
Residuals, % 0
0 to 0.2

Comparable Variants