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C65400 Bronze vs. C21000 Brass

Both C65400 bronze and C21000 brass are copper alloys. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is C65400 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, % 2.6 to 47
2.9 to 50
Poisson's Ratio 0.34
0.34
Rockwell B Hardness 82 to 120
36 to 73
Rockwell Superficial 30T Hardness 71 to 92
44 to 68
Shear Modulus, GPa 43
43
Shear Strength, MPa 350 to 530
180 to 280
Tensile Strength: Ultimate (UTS), MPa 500 to 1060
240 to 450
Tensile Strength: Yield (Proof), MPa 170 to 910
69 to 440

Thermal Properties

Latent Heat of Fusion, J/g 260
200
Maximum Temperature: Mechanical, °C 200
190
Melting Completion (Liquidus), °C 1020
1070
Melting Onset (Solidus), °C 960
1050
Specific Heat Capacity, J/kg-K 400
390
Thermal Conductivity, W/m-K 36
230
Thermal Expansion, µm/m-K 17
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
56
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
57

Otherwise Unclassified Properties

Base Metal Price, % relative 31
30
Density, g/cm3 8.7
8.8
Embodied Carbon, kg CO2/kg material 2.8
2.6
Embodied Energy, MJ/kg 45
42
Embodied Water, L/kg 310
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10 to 480
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 3640
21 to 830
Stiffness to Weight: Axial, points 7.3
7.2
Stiffness to Weight: Bending, points 19
18
Strength to Weight: Axial, points 16 to 34
7.4 to 14
Strength to Weight: Bending, points 16 to 27
9.6 to 15
Thermal Diffusivity, mm2/s 10
69
Thermal Shock Resistance, points 18 to 39
8.1 to 15

Alloy Composition

Chromium (Cr), % 0.010 to 0.12
0
Copper (Cu), % 93.8 to 96.1
94 to 96
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0 to 0.050
0 to 0.030
Silicon (Si), % 2.7 to 3.4
0
Tin (Sn), % 1.2 to 1.9
0
Zinc (Zn), % 0 to 0.5
3.7 to 6.0
Residuals, % 0
0 to 0.2

Comparable Variants