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UNS C85500 Yellow Brass

C85500 brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has a fairly low base cost among cast brasses. In addition, it has the highest ductility and a moderately high thermal conductivity.

The graph bars on the material properties cards below compare C85500 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

85

Elastic (Young's, Tensile) Modulus

100 GPa 15 x 106 psi

Elongation at Break

40 %

Poisson's Ratio

0.31

Rockwell B Hardness

55

Shear Modulus

40 GPa 5.8 x 106 psi

Tensile Strength: Ultimate (UTS)

410 MPa 60 x 103 psi

Tensile Strength: Yield (Proof)

160 MPa 23 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)

890 °C 1630 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

120 W/m-K 67 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

26 % IACS

Electrical Conductivity: Equal Weight (Specific)

29 % IACS

Otherwise Unclassified Properties

Base Metal Price

23 % relative

Density

8.0 g/cm3 500 lb/ft3

Embodied Carbon

2.7 kg CO2/kg material

Embodied Energy

46 MJ/kg 20 x 103 BTU/lb

Embodied Water

320 L/kg 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

130 MJ/m3

Resilience: Unit (Modulus of Resilience)

120 kJ/m3

Stiffness to Weight: Axial

7.3 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

14 points

Strength to Weight: Bending

15 points

Thermal Diffusivity

38 mm2/s

Thermal Shock Resistance

14 points

Alloy Composition

Among cast copper alloys, the composition of C85500 brass is notable for including manganese (Mn). Manganese is used to improve strength without a proportional reduction in ductility.

Copper (Cu) 59 to 63
Zinc (Zn) 35.1 to 41
Manganese (Mn) 0 to 0.2
Nickel (Ni) 0 to 0.2
Iron (Fe) 0 to 0.2
Tin (Sn) 0 to 0.2
Lead (Pb) 0 to 0.2
Residuals 0 to 0.9

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