EN CC764S (CuZn34Mn3AI2Fe1-C) Brass
CC764S brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CC764S is the EN numeric designation for this material. CuZn34Mn3AI2Fe1-C is the EN chemical designation.
It has a fairly low base cost among cast brasses. In addition, it has a very high tensile strength and a fairly high electrical conductivity.
The graph bars on the material properties cards below compare CC764S 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
160
Elastic (Young's, Tensile) Modulus
110 GPa 16 x 106 psi
Elongation at Break
15 %
Poisson's Ratio
0.31
Shear Modulus
41 GPa 6.0 x 106 psi
Tensile Strength: Ultimate (UTS)
680 MPa 99 x 103 psi
Tensile Strength: Yield (Proof)
290 MPa 42 x 103 psi
Thermal Properties
Latent Heat of Fusion
180 J/g
Maximum Temperature: Mechanical
130 °C 270 °F
Melting Completion (Liquidus)
850 °C 1570 °F
Melting Onset (Solidus)
810 °C 1490 °F
Specific Heat Capacity
400 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
94 W/m-K 54 BTU/h-ft-°F
Thermal Expansion
20 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
7.9 g/cm3 500 lb/ft3
Embodied Carbon
2.9 kg CO2/kg material
Embodied Energy
49 MJ/kg 21 x 103 BTU/lb
Embodied Water
330 L/kg 40 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
80 MJ/m3
Resilience: Unit (Modulus of Resilience)
390 kJ/m3
Stiffness to Weight: Axial
7.6 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
24 points
Strength to Weight: Bending
22 points
Thermal Diffusivity
30 mm2/s
Thermal Shock Resistance
22 points
Alloy Composition
Among cast copper alloys, the composition of CC764S brass is notable for containing comparatively high amounts of iron (Fe) and aluminum (Al). Iron is used to increase strength inexpensively. Aluminum is used to add strength and oxidation resistance, at the cost of requiring additional care during casting.
| Cu | 52 to 66 | |
| Zn | 20.7 to 50.2 | |
| Mn | 0.3 to 4.0 | |
| Al | 1.0 to 3.0 | |
| Ni | 0 to 3.0 | |
| Fe | 0.5 to 2.5 | |
| Sn | 0 to 0.3 | |
| Pb | 0 to 0.3 | |
| Si | 0 to 0.1 | |
| Sb | 0 to 0.050 | |
| P | 0 to 0.030 |
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