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CC481K Bronze vs. CC766S Brass

Both CC481K bronze and CC766S brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 62% of their average alloy composition in common.

For each property being compared, the top bar is CC481K bronze and the bottom bar is CC766S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90
120
Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 4.5
28
Poisson's Ratio 0.34
0.31
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 350
500
Tensile Strength: Yield (Proof), MPa 180
190

Thermal Properties

Latent Heat of Fusion, J/g 190
180
Maximum Temperature: Mechanical, °C 170
130
Melting Completion (Liquidus), °C 1000
840
Melting Onset (Solidus), °C 880
800
Specific Heat Capacity, J/kg-K 370
390
Thermal Conductivity, W/m-K 64
89
Thermal Expansion, µm/m-K 18
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
32
Electrical Conductivity: Equal Weight (Specific), % IACS 10
36

Otherwise Unclassified Properties

Base Metal Price, % relative 35
24
Density, g/cm3 8.7
8.0
Embodied Carbon, kg CO2/kg material 3.7
2.8
Embodied Energy, MJ/kg 60
48
Embodied Water, L/kg 390
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13
110
Resilience: Unit (Modulus of Resilience), kJ/m3 150
180
Stiffness to Weight: Axial, points 6.9
7.3
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 11
17
Strength to Weight: Bending, points 13
18
Thermal Diffusivity, mm2/s 20
28
Thermal Shock Resistance, points 13
17

Alloy Composition

Aluminum (Al), % 0 to 0.010
0.3 to 1.8
Antimony (Sb), % 0 to 0.050
0 to 0.1
Copper (Cu), % 87 to 89.5
58 to 64
Iron (Fe), % 0 to 0.1
0 to 0.5
Lead (Pb), % 0 to 0.25
0 to 0.5
Manganese (Mn), % 0 to 0.050
0 to 0.5
Nickel (Ni), % 0 to 0.1
0 to 2.0
Phosphorus (P), % 0 to 1.0
0
Silicon (Si), % 0 to 0.010
0 to 0.6
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 10 to 11.5
0 to 0.5
Zinc (Zn), % 0 to 0.5
29.5 to 41.7