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CC481K Bronze vs. CC765S Brass

Both CC481K bronze and CC765S brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 59% of their average alloy composition in common.

For each property being compared, the top bar is CC481K bronze and the bottom bar is CC765S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90
130
Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 4.5
21
Poisson's Ratio 0.34
0.31
Shear Modulus, GPa 40
42
Tensile Strength: Ultimate (UTS), MPa 350
540
Tensile Strength: Yield (Proof), MPa 180
220

Thermal Properties

Latent Heat of Fusion, J/g 190
180
Maximum Temperature: Mechanical, °C 170
140
Melting Completion (Liquidus), °C 1000
860
Melting Onset (Solidus), °C 880
820
Specific Heat Capacity, J/kg-K 370
400
Thermal Conductivity, W/m-K 64
91
Thermal Expansion, µm/m-K 18
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
30
Electrical Conductivity: Equal Weight (Specific), % IACS 10
34

Otherwise Unclassified Properties

Base Metal Price, % relative 35
24
Density, g/cm3 8.7
8.0
Embodied Carbon, kg CO2/kg material 3.7
3.0
Embodied Energy, MJ/kg 60
51
Embodied Water, L/kg 390
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13
90
Resilience: Unit (Modulus of Resilience), kJ/m3 150
220
Stiffness to Weight: Axial, points 6.9
7.6
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 11
19
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
0.5 to 2.5
Antimony (Sb), % 0 to 0.050
0 to 0.080
Copper (Cu), % 87 to 89.5
51 to 65
Iron (Fe), % 0 to 0.1
0.5 to 2.0
Lead (Pb), % 0 to 0.25
0 to 0.5
Manganese (Mn), % 0 to 0.050
0.3 to 3.0
Nickel (Ni), % 0 to 0.1
0 to 6.0
Phosphorus (P), % 0 to 1.0
0 to 0.030
Silicon (Si), % 0 to 0.010
0 to 0.1
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 10 to 11.5
0 to 1.0
Zinc (Zn), % 0 to 0.5
19.8 to 47.7