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UNS C83400 Red Brass

C83400 brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has the highest electrical conductivity among cast brasses. In addition, it has the highest thermal conductivity and a very low embodied energy.

The graph bars on the material properties cards below compare C83400 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

Elastic (Young's, Tensile) Modulus

110 GPa 16 x 106 psi

Elongation at Break

30 %

Poisson's Ratio

0.33

Rockwell F Hardness

50

Shear Modulus

42 GPa 6.1 x 106 psi

Tensile Strength: Ultimate (UTS)

240 MPa 35 x 103 psi

Tensile Strength: Yield (Proof)

69 MPa 10 x 103 psi

Thermal Properties

Latent Heat of Fusion

200 J/g

Maximum Temperature: Mechanical

180 °C 360 °F

Melting Completion (Liquidus)

1040 °C 1910 °F

Melting Onset (Solidus)

1020 °C 1870 °F

Specific Heat Capacity

380 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

190 W/m-K 110 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

44 % IACS

Electrical Conductivity: Equal Weight (Specific)

46 % IACS

Otherwise Unclassified Properties

Base Metal Price

29 % relative

Density

8.7 g/cm3 540 lb/ft3

Embodied Carbon

2.7 kg CO2/kg material

Embodied Energy

43 MJ/kg 18 x 103 BTU/lb

Embodied Water

320 L/kg 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

55 MJ/m3

Resilience: Unit (Modulus of Resilience)

21 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

7.7 points

Strength to Weight: Bending

9.9 points

Thermal Diffusivity

57 mm2/s

Thermal Shock Resistance

8.4 points

Alloy Composition

Among cast copper alloys, the composition of C83400 brass is notable for including sulfur (S) and antimony (Sb). Sulfur is used to improve machinability at the cost of a decrease in electrical conductivity. Antimony is used to improve certain types of corrosion resistance.

Copper (Cu) 88 to 92
Zinc (Zn) 8.0 to 12
Nickel (Ni) 0 to 1.0
Lead (Pb) 0 to 0.5
Iron (Fe) 0 to 0.25
Antimony (Sb) 0 to 0.25
Tin (Sn) 0 to 0.2
Sulfur (S) 0 to 0.080
Phosphorus (P) 0 to 0.030
Silicon (Si) 0 to 0.0050
Aluminum (Al) 0 to 0.0050
Residuals 0 to 0.7

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015