UNS C84000 Semi-Red Brass
C84000 brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has a fairly high base cost among cast brasses. In addition, it has a fairly high melting temperature and a moderately high embodied energy.
The graph bars on the material properties cards below compare C84000 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
65
Elastic (Young's, Tensile) Modulus
110 GPa 16 x 106 psi
Elongation at Break
27 %
Poisson's Ratio
0.33
Shear Modulus
42 GPa 6.1 x 106 psi
Tensile Strength: Ultimate (UTS)
250 MPa 37 x 103 psi
Tensile Strength: Yield (Proof)
140 MPa 20 x 103 psi
Thermal Properties
Latent Heat of Fusion
190 J/g
Maximum Temperature: Mechanical
170 °C 350 °F
Melting Completion (Liquidus)
1040 °C 1910 °F
Melting Onset (Solidus)
940 °C 1720 °F
Specific Heat Capacity
380 J/kg-K 0.091 BTU/lb-°F
Thermal Conductivity
72 W/m-K 42 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
16 % IACS
Electrical Conductivity: Equal Weight (Specific)
17 % IACS
Otherwise Unclassified Properties
Base Metal Price
30 % relative
Density
8.6 g/cm3 540 lb/ft3
Embodied Carbon
3.0 kg CO2/kg material
Embodied Energy
49 MJ/kg 21 x 103 BTU/lb
Embodied Water
330 L/kg 40 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
58 MJ/m3
Resilience: Unit (Modulus of Resilience)
83 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
8.2 points
Strength to Weight: Bending
10 points
Thermal Diffusivity
22 mm2/s
Thermal Shock Resistance
9.0 points
Alloy Composition
Among cast copper alloys, the composition of C84000 brass is notable for including zirconium (Zr). Zirconium is used to increase recrystallization temperature and to permit or facilitate certain forms of heat treatment.
| Cu | 82 to 89 | |
| Zn | 5.0 to 14 | |
| Sn | 2.0 to 4.0 | |
| Ni | 0.5 to 2.0 | |
| S | 0.1 to 0.65 | |
| Fe | 0 to 0.4 | |
| B | 0 to 0.1 | |
| Zr | 0 to 0.1 | |
| Pb | 0 to 0.090 | |
| P | 0 to 0.050 | |
| Sb | 0 to 0.020 | |
| Mn | 0 to 0.010 | |
| 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.