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C68400 Brass vs. C21000 Brass

Both C68400 brass and C21000 brass are copper alloys. They have 66% of their average alloy composition in common. There are 29 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 C68400 brass and the bottom bar is C21000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 18
2.9 to 50
Poisson's Ratio 0.31
0.34
Shear Modulus, GPa 41
43
Shear Strength, MPa 330
180 to 280
Tensile Strength: Ultimate (UTS), MPa 540
240 to 450
Tensile Strength: Yield (Proof), MPa 310
69 to 440

Thermal Properties

Latent Heat of Fusion, J/g 210
200
Maximum Temperature: Mechanical, °C 130
190
Melting Completion (Liquidus), °C 840
1070
Melting Onset (Solidus), °C 820
1050
Specific Heat Capacity, J/kg-K 400
390
Thermal Conductivity, W/m-K 66
230
Thermal Expansion, µm/m-K 20
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 87
56
Electrical Conductivity: Equal Weight (Specific), % IACS 99
57

Otherwise Unclassified Properties

Base Metal Price, % relative 23
30
Density, g/cm3 7.9
8.8
Embodied Carbon, kg CO2/kg material 2.7
2.6
Embodied Energy, MJ/kg 47
42
Embodied Water, L/kg 320
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 460
21 to 830
Stiffness to Weight: Axial, points 7.5
7.2
Stiffness to Weight: Bending, points 20
18
Strength to Weight: Axial, points 19
7.4 to 14
Strength to Weight: Bending, points 19
9.6 to 15
Thermal Diffusivity, mm2/s 21
69
Thermal Shock Resistance, points 18
8.1 to 15

Alloy Composition


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Aluminum (Al), % 0 to 0.5
0
Boron (B), % 0.0010 to 0.030
0
Copper (Cu), % 59 to 64
94 to 96
Iron (Fe), % 0 to 1.0
0 to 0.050
Lead (Pb), % 0 to 0.090
0 to 0.030
Manganese (Mn), % 0.2 to 1.5
0
Nickel (Ni), % 0 to 0.5
0
Phosphorus (P), % 0.030 to 0.3
0
Silicon (Si), % 1.5 to 2.5
0
Tin (Sn), % 0 to 0.5
0
Zinc (Zn), % 28.6 to 39.3
3.7 to 6.0
Residuals, % 0 to 0.5
0 to 0.2