EN CC767S (CuZn38AI-C) Aluminum Brass
CC767S brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CC767S is the EN numeric designation for this material. CuZn38AI-C is the EN chemical designation.
It has a fairly low base cost among cast brasses. In addition, it has a fairly high ductility and a fairly high electrical conductivity.
The graph bars on the material properties cards below compare CC767S brass to: cast brasses (top), all copper alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
86
Elastic (Young's, Tensile) Modulus
110 GPa 15 x 106 psi
Elongation at Break
34 %
Poisson's Ratio
0.31
Shear Modulus
40 GPa 5.9 x 106 psi
Tensile Strength: Ultimate (UTS)
430 MPa 62 x 103 psi
Tensile Strength: Yield (Proof)
150 MPa 21 x 103 psi
Thermal Properties
Latent Heat of Fusion
180 J/g
Maximum Temperature: Mechanical
120 °C 260 °F
Melting Completion (Liquidus)
840 °C 1540 °F
Melting Onset (Solidus)
790 °C 1460 °F
Specific Heat Capacity
390 J/kg-K 0.093 BTU/lb-°F
Thermal Conductivity
110 W/m-K 61 BTU/h-ft-°F
Thermal Expansion
21 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
32 % IACS
Electrical Conductivity: Equal Weight (Specific)
36 % IACS
Otherwise Unclassified Properties
Base Metal Price
23 % relative
Density
8.0 g/cm3 500 lb/ft3
Embodied Carbon
2.7 kg CO2/kg material
Embodied Energy
47 MJ/kg 20 x 103 BTU/lb
Embodied Water
330 L/kg 39 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m3
Resilience: Unit (Modulus of Resilience)
100 kJ/m3
Stiffness to Weight: Axial
7.3 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
15 points
Strength to Weight: Bending
16 points
Thermal Diffusivity
34 mm2/s
Thermal Shock Resistance
14 points
Alloy Composition
Among cast copper alloys, the composition of CC767S brass is notable for including manganese (Mn). Manganese is used to improve strength without a proportional reduction in ductility.
| Cu | 58 to 64 | |
| Zn | 32.8 to 41.9 | |
| Ni | 0 to 1.0 | |
| Al | 0.1 to 0.8 | |
| Mn | 0 to 0.5 | |
| Fe | 0 to 0.5 | |
| Si | 0 to 0.2 | |
| Sn | 0 to 0.1 | |
| Pb | 0 to 0.1 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 1982: Copper and copper alloys - Ingots and castings