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C21000 Brass vs. C70620 Copper-nickel

Both C21000 brass and C70620 copper-nickel are copper alloys. They have 89% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is C21000 brass and the bottom bar is C70620 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Poisson's Ratio 0.34
0.34
Rockwell B Hardness 36 to 73
65 to 87
Rockwell Superficial 30T Hardness 44 to 68
61 to 75
Shear Modulus, GPa 43
46
Tensile Strength: Ultimate (UTS), MPa 240 to 450
300 to 570

Thermal Properties

Latent Heat of Fusion, J/g 200
220
Maximum Temperature: Mechanical, °C 190
220
Melting Completion (Liquidus), °C 1070
1120
Melting Onset (Solidus), °C 1050
1060
Specific Heat Capacity, J/kg-K 390
390
Thermal Conductivity, W/m-K 230
49
Thermal Expansion, µm/m-K 18
17

Otherwise Unclassified Properties

Base Metal Price, % relative 30
33
Density, g/cm3 8.8
8.9
Embodied Carbon, kg CO2/kg material 2.6
3.4
Embodied Energy, MJ/kg 42
51
Embodied Water, L/kg 310
300

Common Calculations

Stiffness to Weight: Axial, points 7.2
7.7
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 7.4 to 14
9.3 to 18
Strength to Weight: Bending, points 9.6 to 15
11 to 17
Thermal Diffusivity, mm2/s 69
14
Thermal Shock Resistance, points 8.1 to 15
10 to 20

Alloy Composition

Carbon (C), % 0
0 to 0.050
Copper (Cu), % 94 to 96
86.5 to 90
Iron (Fe), % 0 to 0.050
1.0 to 1.8
Lead (Pb), % 0 to 0.030
0 to 0.020
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0
0 to 0.2
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 3.7 to 6.0
0 to 0.5
Residuals, % 0
0 to 0.5

Comparable Variants