UNS C85800 Leaded Yellow Brass
C85800 brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. The graph bars on the material properties cards below compare C85800 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
100 GPa 15 x 106 psi
Elongation at Break
15 %
Poisson's Ratio
0.31
Rockwell B Hardness
56
Shear Modulus
40 GPa 5.8 x 106 psi
Tensile Strength: Ultimate (UTS)
380 MPa 55 x 103 psi
Tensile Strength: Yield (Proof)
210 MPa 30 x 103 psi
Thermal Properties
Latent Heat of Fusion
170 J/g
Maximum Temperature: Mechanical
120 °C 250 °F
Melting Completion (Liquidus)
900 °C 1650 °F
Melting Onset (Solidus)
870 °C 1600 °F
Specific Heat Capacity
380 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
84 W/m-K 49 BTU/h-ft-°F
Thermal Expansion
20 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
20 % IACS
Electrical Conductivity: Equal Weight (Specific)
22 % 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
47 MJ/kg 20 x 103 BTU/lb
Embodied Water
330 L/kg 39 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
48 MJ/m3
Resilience: Unit (Modulus of Resilience)
210 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
13 points
Strength to Weight: Bending
15 points
Thermal Diffusivity
27 mm2/s
Thermal Shock Resistance
13 points
Alloy Composition
Among cast copper alloys, the composition of C85800 brass is notable for including arsenic (As). Arsenic is used to protect the alloy against dezincification.
| Cu | 57 to 69 | |
| Zn | 31 to 41 | |
| Pb | 0 to 1.5 | |
| Sn | 0 to 1.5 | |
| Al | 0 to 0.55 | |
| Ni | 0 to 0.5 | |
| Fe | 0 to 0.5 | |
| Mn | 0 to 0.25 | |
| Si | 0 to 0.25 | |
| S | 0 to 0.050 | |
| Sb | 0 to 0.050 | |
| As | 0 to 0.050 | |
| P | 0 to 0.010 | |
| res. | 0 to 1.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B176: Standard Specification for Copper-Alloy Die Castings
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