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CC381H Copper-nickel vs. CC755S Brass

Both CC381H copper-nickel and CC755S brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 61% of their average alloy composition in common.

For each property being compared, the top bar is CC381H copper-nickel and the bottom bar is CC755S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
110
Elastic (Young's, Tensile) Modulus, GPa 140
100
Elongation at Break, % 20
9.5
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 52
40
Tensile Strength: Ultimate (UTS), MPa 380
390
Tensile Strength: Yield (Proof), MPa 140
250

Thermal Properties

Latent Heat of Fusion, J/g 240
170
Maximum Temperature: Mechanical, °C 260
120
Melting Completion (Liquidus), °C 1180
820
Melting Onset (Solidus), °C 1120
780
Specific Heat Capacity, J/kg-K 410
390
Thermal Conductivity, W/m-K 30
120
Thermal Expansion, µm/m-K 16
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.8
27
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
30

Otherwise Unclassified Properties

Base Metal Price, % relative 40
23
Density, g/cm3 8.9
8.1
Embodied Carbon, kg CO2/kg material 5.0
2.7
Embodied Energy, MJ/kg 73
46
Embodied Water, L/kg 280
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 60
33
Resilience: Unit (Modulus of Resilience), kJ/m3 68
290
Stiffness to Weight: Axial, points 8.6
7.1
Stiffness to Weight: Bending, points 19
19
Strength to Weight: Axial, points 12
14
Strength to Weight: Bending, points 13
15
Thermal Diffusivity, mm2/s 8.4
38
Thermal Shock Resistance, points 13
13

Alloy Composition

Aluminum (Al), % 0 to 0.010
0.4 to 0.7
Carbon (C), % 0 to 0.030
0
Copper (Cu), % 64.5 to 69.9
59.5 to 61
Iron (Fe), % 0.5 to 1.5
0.050 to 0.2
Lead (Pb), % 0 to 0.030
1.2 to 1.7
Manganese (Mn), % 0.6 to 1.2
0 to 0.050
Nickel (Ni), % 29 to 31
0 to 0.2
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.1
0 to 0.050
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 0 to 0.5
35.8 to 38.9