EN CC762S (CuZn25AI5Mn4Fe3-C) Brass
CC762S brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CC762S is the EN numeric designation for this material. CuZn25AI5Mn4Fe3-C is the EN chemical designation.
It has the highest tensile strength among cast brasses. In addition, it has a fairly low ductility and a fairly high embodied energy.
The graph bars on the material properties cards below compare CC762S 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
210
Elastic (Young's, Tensile) Modulus
110 GPa 16 x 106 psi
Elongation at Break
7.3 %
Poisson's Ratio
0.32
Shear Modulus
43 GPa 6.2 x 106 psi
Tensile Strength: Ultimate (UTS)
840 MPa 120 x 103 psi
Tensile Strength: Yield (Proof)
540 MPa 78 x 103 psi
Thermal Properties
Latent Heat of Fusion
200 J/g
Maximum Temperature: Mechanical
160 °C 330 °F
Melting Completion (Liquidus)
920 °C 1680 °F
Melting Onset (Solidus)
870 °C 1600 °F
Specific Heat Capacity
420 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
51 W/m-K 30 BTU/h-ft-°F
Thermal Expansion
20 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
28 % IACS
Electrical Conductivity: Equal Weight (Specific)
32 % IACS
Otherwise Unclassified Properties
Base Metal Price
24 % relative
Density
8.0 g/cm3 500 lb/ft3
Embodied Carbon
3.1 kg CO2/kg material
Embodied Energy
51 MJ/kg 22 x 103 BTU/lb
Embodied Water
350 L/kg 42 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
54 MJ/m3
Resilience: Unit (Modulus of Resilience)
1290 kJ/m3
Stiffness to Weight: Axial
7.8 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
29 points
Strength to Weight: Bending
25 points
Thermal Diffusivity
15 mm2/s
Thermal Shock Resistance
27 points
Alloy Composition
Among cast copper alloys, the composition of CC762S 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 | 57 to 67 | |
| Zn | 13.4 to 36 | |
| Al | 3.0 to 7.0 | |
| Mn | 2.5 to 5.0 | |
| Fe | 1.5 to 4.0 | |
| Ni | 0 to 3.0 | |
| Sn | 0 to 0.2 | |
| Pb | 0 to 0.2 | |
| Si | 0 to 0.1 | |
| P | 0 to 0.030 | |
| Sb | 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