UNS C84100 Semi-Red Brass
C84100 brass is a brass formulated for casting. Cited properties are appropriate for the annealed condition. It has a moderately low tensile strength among cast brasses. In addition, it has a moderately high base cost and a moderately low ductility.
The graph bars on the material properties cards below compare C84100 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
13 %
Poisson's Ratio
0.33
Shear Modulus
39 GPa 5.7 x 106 psi
Tensile Strength: Ultimate (UTS)
230 MPa 33 x 103 psi
Tensile Strength: Yield (Proof)
81 MPa 12 x 103 psi
Thermal Properties
Latent Heat of Fusion
190 J/g
Maximum Temperature: Mechanical
160 °C 320 °F
Melting Completion (Liquidus)
1000 °C 1830 °F
Melting Onset (Solidus)
810 °C 1490 °F
Specific Heat Capacity
380 J/kg-K 0.091 BTU/lb-°F
Thermal Conductivity
110 W/m-K 61 BTU/h-ft-°F
Thermal Expansion
19 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
23 % IACS
Electrical Conductivity: Equal Weight (Specific)
25 % IACS
Otherwise Unclassified Properties
Base Metal Price
29 % relative
Density
8.5 g/cm3 530 lb/ft3
Embodied Carbon
2.9 kg CO2/kg material
Embodied Energy
48 MJ/kg 21 x 103 BTU/lb
Embodied Water
340 L/kg 40 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
24 MJ/m3
Resilience: Unit (Modulus of Resilience)
30 kJ/m3
Stiffness to Weight: Axial
7.1 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
7.4 points
Strength to Weight: Bending
9.7 points
Thermal Diffusivity
33 mm2/s
Thermal Shock Resistance
7.8 points
Alloy Composition
Among cast copper alloys, the composition of C84100 brass is notable for including bismuth (Bi). Bismuth improves machinability and pressure tightness. It is used a non-toxic but more expensive replacement for lead.
| Cu | 78 to 85 | |
| Zn | 12 to 20 | |
| Sn | 1.5 to 4.5 | |
| Ni | 0 to 0.5 | |
| Fe | 0 to 0.3 | |
| Pb | 0.050 to 0.25 | |
| Bi | 0 to 0.090 | |
| P | 0 to 0.050 | |
| Sb | 0 to 0.050 | |
| Si | 0 to 0.010 | |
| Al | 0 to 0.010 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.