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CR021A Copper vs. CC490K Brass

Both CR021A copper and CC490K brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 84% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is CR021A copper and the bottom bar is CC490K brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
110
Elongation at Break, % 15
15
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 43
40
Tensile Strength: Ultimate (UTS), MPa 230
230
Tensile Strength: Yield (Proof), MPa 140
110

Thermal Properties

Latent Heat of Fusion, J/g 210
190
Maximum Temperature: Mechanical, °C 200
160
Melting Completion (Liquidus), °C 1090
980
Melting Onset (Solidus), °C 1040
910
Specific Heat Capacity, J/kg-K 390
370
Thermal Conductivity, W/m-K 380
72
Thermal Expansion, µm/m-K 17
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 98
16
Electrical Conductivity: Equal Weight (Specific), % IACS 99
16

Otherwise Unclassified Properties

Base Metal Price, % relative 31
30
Density, g/cm3 9.0
8.8
Embodied Carbon, kg CO2/kg material 2.6
2.9
Embodied Energy, MJ/kg 41
47
Embodied Water, L/kg 320
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
28
Resilience: Unit (Modulus of Resilience), kJ/m3 83
54
Stiffness to Weight: Axial, points 7.2
6.8
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 7.1
7.3
Strength to Weight: Bending, points 9.3
9.5
Thermal Diffusivity, mm2/s 110
22
Thermal Shock Resistance, points 8.1
8.2

Alloy Composition

Aluminum (Al), % 0
0 to 0.010
Antimony (Sb), % 0
0 to 0.3
Bismuth (Bi), % 0 to 0.00050
0
Copper (Cu), % 99.95 to 99.998
81 to 86
Iron (Fe), % 0
0 to 0.5
Lead (Pb), % 0 to 0.0050
3.0 to 6.0
Nickel (Ni), % 0
0 to 2.0
Phosphorus (P), % 0.0020 to 0.0070
0 to 0.050
Silicon (Si), % 0
0 to 0.010
Silver (Ag), % 0 to 0.015
0
Sulfur (S), % 0
0 to 0.1
Tin (Sn), % 0
2.0 to 3.5
Zinc (Zn), % 0
7.0 to 9.5