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C27400 Brass vs. C68800 Brass

Both C27400 brass and C68800 brass are copper alloys. They have 85% 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 C27400 brass and the bottom bar is C68800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Poisson's Ratio 0.31
0.32
Rockwell B Hardness 53 to 91
81 to 99
Rockwell Superficial 30T Hardness 52 to 78
71 to 83
Shear Modulus, GPa 40
41
Tensile Strength: Ultimate (UTS), MPa 370 to 650
570 to 890

Thermal Properties

Latent Heat of Fusion, J/g 170
190
Maximum Temperature: Mechanical, °C 120
160
Melting Completion (Liquidus), °C 920
960
Melting Onset (Solidus), °C 870
950
Specific Heat Capacity, J/kg-K 390
400
Thermal Conductivity, W/m-K 120
40
Thermal Expansion, µm/m-K 21
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
18
Electrical Conductivity: Equal Weight (Specific), % IACS 31
20

Otherwise Unclassified Properties

Base Metal Price, % relative 23
26
Density, g/cm3 8.0
8.2
Embodied Carbon, kg CO2/kg material 2.7
2.8
Embodied Energy, MJ/kg 45
48
Embodied Water, L/kg 320
350

Common Calculations

Stiffness to Weight: Axial, points 7.2
7.3
Stiffness to Weight: Bending, points 20
19
Strength to Weight: Axial, points 13 to 23
19 to 30
Strength to Weight: Bending, points 14 to 21
19 to 25
Thermal Diffusivity, mm2/s 37
12
Thermal Shock Resistance, points 12 to 22
19 to 30

Alloy Composition

Aluminum (Al), % 0
3.0 to 3.8
Cobalt (Co), % 0
0.25 to 0.55
Copper (Cu), % 61 to 64
70.8 to 75.5
Iron (Fe), % 0 to 0.1
0 to 0.2
Lead (Pb), % 0 to 0.050
0 to 0.050
Zinc (Zn), % 35.6 to 39
21.3 to 24.1
Residuals, % 0
0 to 0.5

Comparable Variants