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UNS C33200 Leaded Brass

C33200 brass is a brass formulated for primary forming into wrought products. C33200 is the UNS number for this material. Additionally, the common industry name is 66-32.4-1.6.

The properties of C33200 brass include four 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 C33200 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

7.0 to 60 %

Poisson's Ratio

0.31

Rockwell Superficial 30T Hardness

26 to 69

Shear Modulus

40 GPa 5.8 x 106 psi

Shear Strength

240 to 300 MPa 35 to 44 x 103 psi

Tensile Strength: Ultimate (UTS)

320 to 520 MPa 47 to 75 x 103 psi

Tensile Strength: Yield (Proof)

110 to 450 MPa 16 to 65 x 103 psi

Thermal Properties

Latent Heat of Fusion

170 J/g

Maximum Temperature: Mechanical

130 °C 270 °F

Melting Completion (Liquidus)

930 °C 1710 °F

Melting Onset (Solidus)

900 °C 1650 °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

20 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

26 % IACS

Electrical Conductivity: Equal Weight (Specific)

28 % IACS

Otherwise Unclassified Properties

Base Metal Price

24 % relative

Density

8.2 g/cm3 510 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

44 MJ/kg 19 x 103 BTU/lb

Embodied Water

320 L/kg 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

35 to 150 MJ/m3

Resilience: Unit (Modulus of Resilience)

60 to 960 kJ/m3

Stiffness to Weight: Axial

7.1 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

11 to 17 points

Strength to Weight: Bending

13 to 17 points

Thermal Diffusivity

37 mm2/s

Thermal Shock Resistance

11 to 17 points

Alloy Composition

Among wrought copper alloys, the composition of C33200 brass is notable for containing a comparatively high amount of lead (Pb). Lead is used to improve machinability and bearing properties, at the cost of toxicity.

Copper (Cu) 65 to 68
Zinc (Zn) 29 to 33.5
Lead (Pb) 1.5 to 2.5
Iron (Fe) 0 to 0.070
Residuals 0 to 0.4

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

Followup Questions

Similar Alloys

Further Reading

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993