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CC497K Bronze vs. CC761S Brass

Both CC497K bronze and CC761S brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 75% of their average alloy composition in common.

For each property being compared, the top bar is CC497K bronze and the bottom bar is CC761S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 55
150
Elastic (Young's, Tensile) Modulus, GPa 93
110
Elongation at Break, % 6.7
8.7
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 34
42
Tensile Strength: Ultimate (UTS), MPa 190
540
Tensile Strength: Yield (Proof), MPa 91
340

Thermal Properties

Latent Heat of Fusion, J/g 160
260
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 870
960
Melting Onset (Solidus), °C 800
910
Specific Heat Capacity, J/kg-K 330
410
Thermal Conductivity, W/m-K 53
27
Thermal Expansion, µm/m-K 20
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
40
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
43

Otherwise Unclassified Properties

Base Metal Price, % relative 29
27
Density, g/cm3 9.3
8.3
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 48
45
Embodied Water, L/kg 370
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10
41
Resilience: Unit (Modulus of Resilience), kJ/m3 45
530
Stiffness to Weight: Axial, points 5.5
7.4
Stiffness to Weight: Bending, points 16
19
Strength to Weight: Axial, points 5.6
18
Strength to Weight: Bending, points 7.8
18
Thermal Diffusivity, mm2/s 17
8.0
Thermal Shock Resistance, points 7.2
19

Alloy Composition

Aluminum (Al), % 0 to 0.010
0 to 0.1
Antimony (Sb), % 0 to 0.75
0 to 0.050
Copper (Cu), % 67.5 to 77.5
78 to 83
Iron (Fe), % 0 to 0.25
0 to 0.6
Lead (Pb), % 18 to 23
0 to 0.8
Manganese (Mn), % 0 to 0.2
0 to 0.2
Nickel (Ni), % 0.5 to 2.5
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), % 4.0 to 6.0
0 to 0.3
Zinc (Zn), % 0 to 2.0
8.9 to 19