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CC381H Copper-nickel vs. CC761S Brass

Both CC381H copper-nickel and CC761S brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 68% of their average alloy composition in common.

For each property being compared, the top bar is CC381H copper-nickel and the bottom bar is CC761S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
150
Elastic (Young's, Tensile) Modulus, GPa 140
110
Elongation at Break, % 20
8.7
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 52
42
Tensile Strength: Ultimate (UTS), MPa 380
540
Tensile Strength: Yield (Proof), MPa 140
340

Thermal Properties

Latent Heat of Fusion, J/g 240
260
Maximum Temperature: Mechanical, °C 260
170
Melting Completion (Liquidus), °C 1180
960
Melting Onset (Solidus), °C 1120
910
Specific Heat Capacity, J/kg-K 410
410
Thermal Conductivity, W/m-K 30
27
Thermal Expansion, µm/m-K 16
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.8
40
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
43

Otherwise Unclassified Properties

Base Metal Price, % relative 40
27
Density, g/cm3 8.9
8.3
Embodied Carbon, kg CO2/kg material 5.0
2.7
Embodied Energy, MJ/kg 73
45
Embodied Water, L/kg 280
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 60
41
Resilience: Unit (Modulus of Resilience), kJ/m3 68
530
Stiffness to Weight: Axial, points 8.6
7.4
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 12
18
Strength to Weight: Bending, points 13
18
Thermal Diffusivity, mm2/s 8.4
8.0
Thermal Shock Resistance, points 13
19

Alloy Composition

Aluminum (Al), % 0 to 0.010
0 to 0.1
Antimony (Sb), % 0
0 to 0.050
Carbon (C), % 0 to 0.030
0
Copper (Cu), % 64.5 to 69.9
78 to 83
Iron (Fe), % 0.5 to 1.5
0 to 0.6
Lead (Pb), % 0 to 0.030
0 to 0.8
Manganese (Mn), % 0.6 to 1.2
0 to 0.2
Nickel (Ni), % 29 to 31
0 to 1.0
Phosphorus (P), % 0 to 0.010
0 to 0.030
Silicon (Si), % 0 to 0.1
3.0 to 5.0
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 0 to 0.5
8.9 to 19