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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.

Copper (Cu) 57 to 67
Zinc (Zn) 13.4 to 36
Aluminum (Al) 3.0 to 7.0
Manganese (Mn) 2.5 to 5.0
Iron (Fe) 1.5 to 4.0
Nickel (Ni) 0 to 3.0
Tin (Sn) 0 to 0.2
Lead (Pb) 0 to 0.2
Silicon (Si) 0 to 0.1
Phosphorus (P) 0 to 0.030
Antimony (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