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CC750S Brass vs. CC491K Bronze

Both CC750S brass and CC491K bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 73% of their average alloy composition in common.

For each property being compared, the top bar is CC750S brass and the bottom bar is CC491K bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 54
73
Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 13
13
Poisson's Ratio 0.31
0.34
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 200
260
Tensile Strength: Yield (Proof), MPa 80
120

Thermal Properties

Latent Heat of Fusion, J/g 170
190
Maximum Temperature: Mechanical, °C 130
160
Melting Completion (Liquidus), °C 860
980
Melting Onset (Solidus), °C 810
900
Specific Heat Capacity, J/kg-K 380
370
Thermal Conductivity, W/m-K 110
71
Thermal Expansion, µm/m-K 20
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
15
Electrical Conductivity: Equal Weight (Specific), % IACS 26
15

Otherwise Unclassified Properties

Base Metal Price, % relative 25
31
Density, g/cm3 8.2
8.9
Embodied Carbon, kg CO2/kg material 2.8
3.1
Embodied Energy, MJ/kg 46
51
Embodied Water, L/kg 330
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
27
Resilience: Unit (Modulus of Resilience), kJ/m3 30
67
Stiffness to Weight: Axial, points 7.1
6.7
Stiffness to Weight: Bending, points 19
18
Strength to Weight: Axial, points 6.8
8.1
Strength to Weight: Bending, points 9.3
10
Thermal Diffusivity, mm2/s 35
22
Thermal Shock Resistance, points 6.7
9.3

Alloy Composition

Aluminum (Al), % 0 to 0.1
0 to 0.010
Antimony (Sb), % 0
0 to 0.25
Copper (Cu), % 62 to 67
81 to 87
Iron (Fe), % 0 to 0.8
0 to 0.3
Lead (Pb), % 1.0 to 3.0
4.0 to 6.0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 0 to 1.0
0 to 2.0
Phosphorus (P), % 0 to 0.050
0 to 0.1
Silicon (Si), % 0 to 0.050
0 to 0.010
Sulfur (S), % 0
0 to 0.1
Tin (Sn), % 0 to 1.5
4.0 to 6.0
Zinc (Zn), % 26.3 to 36
4.0 to 6.0