EN CC765S (CuZn35Mn2AI1Fe1-C) Brass
CC765S brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CC765S is the EN numeric designation for this material. CuZn35Mn2AI1Fe1-C is the EN chemical designation.
It has a fairly high embodied energy among cast brasses. In addition, it has a fairly high tensile strength and a moderately high electrical conductivity.
The graph bars on the material properties cards below compare CC765S 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
130
Elastic (Young's, Tensile) Modulus
110 GPa 16 x 106 psi
Elongation at Break
21 %
Poisson's Ratio
0.31
Shear Modulus
42 GPa 6.1 x 106 psi
Tensile Strength: Ultimate (UTS)
540 MPa 78 x 103 psi
Tensile Strength: Yield (Proof)
220 MPa 32 x 103 psi
Thermal Properties
Latent Heat of Fusion
180 J/g
Maximum Temperature: Mechanical
140 °C 280 °F
Melting Completion (Liquidus)
860 °C 1580 °F
Melting Onset (Solidus)
820 °C 1500 °F
Specific Heat Capacity
400 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
91 W/m-K 52 BTU/h-ft-°F
Thermal Expansion
20 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
30 % IACS
Electrical Conductivity: Equal Weight (Specific)
34 % IACS
Otherwise Unclassified Properties
Base Metal Price
24 % relative
Density
8.0 g/cm3 500 lb/ft3
Embodied Carbon
3.0 kg CO2/kg material
Embodied Energy
51 MJ/kg 22 x 103 BTU/lb
Embodied Water
330 L/kg 40 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
90 MJ/m3
Resilience: Unit (Modulus of Resilience)
220 kJ/m3
Stiffness to Weight: Axial
7.6 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
19 points
Strength to Weight: Bending
18 points
Thermal Diffusivity
28 mm2/s
Thermal Shock Resistance
17 points
Alloy Composition
Among cast copper alloys, the composition of CC765S brass is notable for containing comparatively high amounts of iron (Fe) and nickel (Ni). Iron is used to increase strength inexpensively. Nickel is used to improve strength (particularly at elevated temperatures) and corrosion resistance. It also creates the need for additional care during casting.
| Cu | 51 to 65 | |
| Zn | 19.8 to 47.7 | |
| Ni | 0 to 6.0 | |
| Mn | 0.3 to 3.0 | |
| Al | 0.5 to 2.5 | |
| Fe | 0.5 to 2.0 | |
| Sn | 0 to 1.0 | |
| Pb | 0 to 0.5 | |
| Si | 0 to 0.1 | |
| Sb | 0 to 0.080 | |
| 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