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EN CC766S (CuZn37AI1-C) Aluminum Brass

CC766S brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CC766S is the EN numeric designation for this material. CuZn37AI1-C is the EN chemical designation.

It has a fairly high electrical conductivity among cast brasses. In addition, it has a fairly low melting temperature and a moderately high ductility.

The graph bars on the material properties cards below compare CC766S 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

120

Elastic (Young's, Tensile) Modulus

110 GPa 15 x 106 psi

Elongation at Break

28 %

Poisson's Ratio

0.31

Shear Modulus

40 GPa 5.9 x 106 psi

Tensile Strength: Ultimate (UTS)

500 MPa 73 x 103 psi

Tensile Strength: Yield (Proof)

190 MPa 28 x 103 psi

Thermal Properties

Latent Heat of Fusion

180 J/g

Maximum Temperature: Mechanical

130 °C 260 °F

Melting Completion (Liquidus)

840 °C 1550 °F

Melting Onset (Solidus)

800 °C 1470 °F

Specific Heat Capacity

390 J/kg-K 0.094 BTU/lb-°F

Thermal Conductivity

89 W/m-K 51 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

24 % relative

Density

8.0 g/cm3 500 lb/ft3

Embodied Carbon

2.8 kg CO2/kg material

Embodied Energy

48 MJ/kg 21 x 103 BTU/lb

Embodied Water

330 L/kg 40 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

110 MJ/m3

Resilience: Unit (Modulus of Resilience)

180 kJ/m3

Stiffness to Weight: Axial

7.3 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

17 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 CC766S brass is notable for containing a comparatively high amount of aluminum (Al) and including manganese (Mn). Aluminum is used to add strength and oxidation resistance, at the cost of requiring additional care during casting. Manganese is used to improve strength without a proportional reduction in ductility.

Copper (Cu) 58 to 64
Zinc (Zn) 29.5 to 41.7
Aluminum (Al) 0.3 to 1.8
Nickel (Ni) 0 to 2.0
Silicon (Si) 0 to 0.6
Manganese (Mn) 0 to 0.5
Iron (Fe) 0 to 0.5
Tin (Sn) 0 to 0.5
Lead (Pb) 0 to 0.5
Antimony (Sb) 0 to 0.1

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