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CC381H Copper-nickel vs. CC490K Brass

Both CC381H copper-nickel and CC490K brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 69% of their average alloy composition in common.

For each property being compared, the top bar is CC381H copper-nickel and the bottom bar is CC490K brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
76
Elastic (Young's, Tensile) Modulus, GPa 140
110
Elongation at Break, % 20
15
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 52
40
Tensile Strength: Ultimate (UTS), MPa 380
230
Tensile Strength: Yield (Proof), MPa 140
110

Thermal Properties

Latent Heat of Fusion, J/g 240
190
Maximum Temperature: Mechanical, °C 260
160
Melting Completion (Liquidus), °C 1180
980
Melting Onset (Solidus), °C 1120
910
Specific Heat Capacity, J/kg-K 410
370
Thermal Conductivity, W/m-K 30
72
Thermal Expansion, µm/m-K 16
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.8
16
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
16

Otherwise Unclassified Properties

Base Metal Price, % relative 40
30
Density, g/cm3 8.9
8.8
Embodied Carbon, kg CO2/kg material 5.0
2.9
Embodied Energy, MJ/kg 73
47
Embodied Water, L/kg 280
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 60
28
Resilience: Unit (Modulus of Resilience), kJ/m3 68
54
Stiffness to Weight: Axial, points 8.6
6.8
Stiffness to Weight: Bending, points 19
18
Strength to Weight: Axial, points 12
7.3
Strength to Weight: Bending, points 13
9.5
Thermal Diffusivity, mm2/s 8.4
22
Thermal Shock Resistance, points 13
8.2

Alloy Composition

Aluminum (Al), % 0 to 0.010
0 to 0.010
Antimony (Sb), % 0
0 to 0.3
Carbon (C), % 0 to 0.030
0
Copper (Cu), % 64.5 to 69.9
81 to 86
Iron (Fe), % 0.5 to 1.5
0 to 0.5
Lead (Pb), % 0 to 0.030
3.0 to 6.0
Manganese (Mn), % 0.6 to 1.2
0
Nickel (Ni), % 29 to 31
0 to 2.0
Phosphorus (P), % 0 to 0.010
0 to 0.050
Silicon (Si), % 0 to 0.1
0 to 0.010
Sulfur (S), % 0 to 0.010
0 to 0.1
Tin (Sn), % 0
2.0 to 3.5
Zinc (Zn), % 0 to 0.5
7.0 to 9.5