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CC761S Brass vs. CC493K Bronze

Both CC761S brass and CC493K bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 85% of their average alloy composition in common.

For each property being compared, the top bar is CC761S brass and the bottom bar is CC493K bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
74
Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 8.7
14
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 42
39
Tensile Strength: Ultimate (UTS), MPa 540
270
Tensile Strength: Yield (Proof), MPa 340
140

Thermal Properties

Latent Heat of Fusion, J/g 260
180
Maximum Temperature: Mechanical, °C 170
160
Melting Completion (Liquidus), °C 960
960
Melting Onset (Solidus), °C 910
880
Specific Heat Capacity, J/kg-K 410
360
Thermal Conductivity, W/m-K 27
61
Thermal Expansion, µm/m-K 18
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
12
Electrical Conductivity: Equal Weight (Specific), % IACS 43
12

Otherwise Unclassified Properties

Base Metal Price, % relative 27
32
Density, g/cm3 8.3
8.9
Embodied Carbon, kg CO2/kg material 2.7
3.3
Embodied Energy, MJ/kg 45
53
Embodied Water, L/kg 300
370

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
33
Resilience: Unit (Modulus of Resilience), kJ/m3 530
89
Stiffness to Weight: Axial, points 7.4
6.5
Stiffness to Weight: Bending, points 19
18
Strength to Weight: Axial, points 18
8.6
Strength to Weight: Bending, points 18
11
Thermal Diffusivity, mm2/s 8.0
19
Thermal Shock Resistance, points 19
10

Alloy Composition

Aluminum (Al), % 0 to 0.1
0 to 0.010
Antimony (Sb), % 0 to 0.050
0 to 0.3
Copper (Cu), % 78 to 83
79 to 86
Iron (Fe), % 0 to 0.6
0 to 0.2
Lead (Pb), % 0 to 0.8
5.0 to 8.0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 0 to 1.0
0 to 2.0
Phosphorus (P), % 0 to 0.030
0 to 0.1
Silicon (Si), % 3.0 to 5.0
0 to 0.010
Sulfur (S), % 0
0 to 0.1
Tin (Sn), % 0 to 0.3
5.2 to 8.0
Zinc (Zn), % 8.9 to 19
2.0 to 5.0