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CC495K Bronze vs. CC761S Brass

Both CC495K bronze and CC761S brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 81% of their average alloy composition in common.

For each property being compared, the top bar is CC495K bronze and the bottom bar is CC761S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 76
150
Elastic (Young's, Tensile) Modulus, GPa 100
110
Elongation at Break, % 7.0
8.7
Poisson's Ratio 0.35
0.33
Shear Modulus, GPa 37
42
Tensile Strength: Ultimate (UTS), MPa 240
540
Tensile Strength: Yield (Proof), MPa 120
340

Thermal Properties

Latent Heat of Fusion, J/g 180
260
Maximum Temperature: Mechanical, °C 140
170
Melting Completion (Liquidus), °C 930
960
Melting Onset (Solidus), °C 820
910
Specific Heat Capacity, J/kg-K 350
410
Thermal Conductivity, W/m-K 48
27
Thermal Expansion, µm/m-K 19
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
40
Electrical Conductivity: Equal Weight (Specific), % IACS 10
43

Otherwise Unclassified Properties

Base Metal Price, % relative 33
27
Density, g/cm3 9.0
8.3
Embodied Carbon, kg CO2/kg material 3.6
2.7
Embodied Energy, MJ/kg 58
45
Embodied Water, L/kg 400
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14
41
Resilience: Unit (Modulus of Resilience), kJ/m3 68
530
Stiffness to Weight: Axial, points 6.2
7.4
Stiffness to Weight: Bending, points 17
19
Strength to Weight: Axial, points 7.3
18
Strength to Weight: Bending, points 9.4
18
Thermal Diffusivity, mm2/s 15
8.0
Thermal Shock Resistance, points 8.8
19

Alloy Composition

Aluminum (Al), % 0 to 0.010
0 to 0.1
Antimony (Sb), % 0 to 0.5
0 to 0.050
Copper (Cu), % 76 to 82
78 to 83
Iron (Fe), % 0 to 0.25
0 to 0.6
Lead (Pb), % 8.0 to 11
0 to 0.8
Manganese (Mn), % 0 to 0.2
0 to 0.2
Nickel (Ni), % 0 to 2.0
0 to 1.0
Phosphorus (P), % 0 to 0.1
0 to 0.030
Silicon (Si), % 0 to 0.010
3.0 to 5.0
Sulfur (S), % 0 to 0.1
0
Tin (Sn), % 9.0 to 11
0 to 0.3
Zinc (Zn), % 0 to 2.0
8.9 to 19