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CC765S Brass vs. CC755S Brass

Both CC765S brass and CC755S brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 93% of their average alloy composition in common.

For each property being compared, the top bar is CC765S brass and the bottom bar is CC755S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
110
Elastic (Young's, Tensile) Modulus, GPa 110
100
Elongation at Break, % 21
9.5
Poisson's Ratio 0.31
0.31
Shear Modulus, GPa 42
40
Tensile Strength: Ultimate (UTS), MPa 540
390
Tensile Strength: Yield (Proof), MPa 220
250

Thermal Properties

Latent Heat of Fusion, J/g 180
170
Maximum Temperature: Mechanical, °C 140
120
Melting Completion (Liquidus), °C 860
820
Melting Onset (Solidus), °C 820
780
Specific Heat Capacity, J/kg-K 400
390
Thermal Conductivity, W/m-K 91
120
Thermal Expansion, µm/m-K 20
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
27
Electrical Conductivity: Equal Weight (Specific), % IACS 34
30

Otherwise Unclassified Properties

Base Metal Price, % relative 24
23
Density, g/cm3 8.0
8.1
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 51
46
Embodied Water, L/kg 330
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90
33
Resilience: Unit (Modulus of Resilience), kJ/m3 220
290
Stiffness to Weight: Axial, points 7.6
7.1
Stiffness to Weight: Bending, points 20
19
Strength to Weight: Axial, points 19
14
Strength to Weight: Bending, points 18
15
Thermal Diffusivity, mm2/s 28
38
Thermal Shock Resistance, points 17
13

Alloy Composition

Aluminum (Al), % 0.5 to 2.5
0.4 to 0.7
Antimony (Sb), % 0 to 0.080
0
Copper (Cu), % 51 to 65
59.5 to 61
Iron (Fe), % 0.5 to 2.0
0.050 to 0.2
Lead (Pb), % 0 to 0.5
1.2 to 1.7
Manganese (Mn), % 0.3 to 3.0
0 to 0.050
Nickel (Ni), % 0 to 6.0
0 to 0.2
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.1
0 to 0.050
Tin (Sn), % 0 to 1.0
0 to 0.3
Zinc (Zn), % 19.8 to 47.7
35.8 to 38.9