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C21000 Brass vs. C34000 Brass

Both C21000 brass and C34000 brass are copper alloys. They have 68% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is C21000 brass and the bottom bar is C34000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Poisson's Ratio 0.34
0.31
Rockwell B Hardness 36 to 73
53 to 91
Rockwell Superficial 30T Hardness 44 to 68
52 to 78
Shear Modulus, GPa 43
40
Tensile Strength: Ultimate (UTS), MPa 240 to 450
340 to 650

Thermal Properties

Latent Heat of Fusion, J/g 200
170
Maximum Temperature: Mechanical, °C 190
120
Melting Completion (Liquidus), °C 1070
930
Melting Onset (Solidus), °C 1050
890
Specific Heat Capacity, J/kg-K 390
380
Thermal Conductivity, W/m-K 230
120
Thermal Expansion, µm/m-K 18
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
26
Electrical Conductivity: Equal Weight (Specific), % IACS 57
29

Otherwise Unclassified Properties

Base Metal Price, % relative 30
24
Density, g/cm3 8.8
8.1
Embodied Carbon, kg CO2/kg material 2.6
2.6
Embodied Energy, MJ/kg 42
45
Embodied Water, L/kg 310
320

Common Calculations

Stiffness to Weight: Axial, points 7.2
7.1
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 7.4 to 14
11 to 22
Strength to Weight: Bending, points 9.6 to 15
13 to 21
Thermal Diffusivity, mm2/s 69
37
Thermal Shock Resistance, points 8.1 to 15
11 to 22

Alloy Composition

Copper (Cu), % 94 to 96
62 to 65
Iron (Fe), % 0 to 0.050
0 to 0.1
Lead (Pb), % 0 to 0.030
0.8 to 1.5
Zinc (Zn), % 3.7 to 6.0
33 to 37.2
Residuals, % 0
0 to 0.4

Comparable Variants