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.
| Cu | 88 to 92 | |
| Zn | 8.0 to 12 | |
| Ni | 0 to 1.0 | |
| Pb | 0 to 0.5 | |
| Fe | 0 to 0.25 | |
| Sb | 0 to 0.25 | |
| Sn | 0 to 0.2 | |
| S | 0 to 0.080 | |
| P | 0 to 0.030 | |
| Si | 0 to 0.0050 | |
| Al | 0 to 0.0050 | |
| res. | 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