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UNS C48500 Leaded Naval Brass

C48500 brass is a brass formulated for primary forming into wrought products.

The properties of C48500 brass include eight common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C48500 brass to: wrought 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

13 to 40 %

Poisson's Ratio

0.31

Shear Modulus

39 GPa 5.7 x 106 psi

Shear Strength

250 to 300 MPa 37 to 43 x 103 psi

Tensile Strength: Ultimate (UTS)

400 to 500 MPa 58 to 72 x 103 psi

Tensile Strength: Yield (Proof)

160 to 320 MPa 23 to 47 x 103 psi

Thermal Properties

Latent Heat of Fusion

170 J/g

Maximum Temperature: Mechanical

120 °C 240 °F

Melting Completion (Liquidus)

900 °C 1650 °F

Melting Onset (Solidus)

890 °C 1630 °F

Specific Heat Capacity

380 J/kg-K 0.091 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

8.1 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

330 L/kg 39 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

56 to 140 MJ/m3

Resilience: Unit (Modulus of Resilience)

120 to 500 kJ/m3

Stiffness to Weight: Axial

7.1 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

14 to 17 points

Strength to Weight: Bending

15 to 17 points

Thermal Diffusivity

38 mm2/s

Thermal Shock Resistance

13 to 17 points

Alloy Composition

Among wrought copper alloys, the composition of C48500 brass is notable for containing a comparatively high amount of lead (Pb) and including tin (Sn). Lead is used to improve machinability and bearing properties, at the cost of toxicity. Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media.

Copper (Cu) 59 to 62
Zinc (Zn) 34.3 to 39.2
Lead (Pb) 1.3 to 2.2
Tin (Sn) 0.5 to 1.0
Iron (Fe) 0 to 0.1
Residuals 0 to 0.4

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B21: Standard Specification for Naval Brass Rod, Bar, and Shapes

ASTM B124: Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes

ASTM B283: Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)

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