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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.

Copper (Cu) 51 to 65
Zinc (Zn) 19.8 to 47.7
Nickel (Ni) 0 to 6.0
Manganese (Mn) 0.3 to 3.0
Aluminum (Al) 0.5 to 2.5
Iron (Fe) 0.5 to 2.0
Tin (Sn) 0 to 1.0
Lead (Pb) 0 to 0.5
Silicon (Si) 0 to 0.1
Antimony (Sb) 0 to 0.080
Phosphorus (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