# UNS C83300 Leaded Red Brass

C83300 brass is a brass formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has a fairly high base cost among cast brasses. In addition, it has the highest melting temperature and a very high ductility.

The graph bars on the material properties cards below compare C83300 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

35

Elastic (Young's, Tensile) Modulus

110 *GPa* 16 *x 10 ^{6} psi*

Elongation at Break

35 *%*

Poisson's Ratio

0.34

Shear Modulus

42 *GPa* 6.1 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

220 *MPa* 32 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

69 *MPa* 10 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

200 *J/g*

Maximum Temperature: Mechanical

180 *°C* 360 *°F*

Melting Completion (Liquidus)

1060 *°C* 1940 *°F*

Melting Onset (Solidus)

1030 *°C* 1890 *°F*

Specific Heat Capacity

380 *J/kg-K* 0.090 *BTU/lb-°F*

Thermal Conductivity

160 *W/m-K* 92 *BTU/h-ft-°F*

Thermal Expansion

18 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

32 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

33 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

30 *% relative*

Density

8.8 *g/cm ^{3}* 550

*lb/ft*

^{3}Embodied Carbon

2.7 *kg CO _{2}/kg material*

Embodied Energy

44 *MJ/kg* 19 *x 10 ^{3} BTU/lb*

Embodied Water

320 *L/kg* 38 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

60 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

21 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.0 *points*

Stiffness to Weight: Bending

18 *points*

Strength to Weight: Axial

6.9 *points*

Strength to Weight: Bending

9.2 *points*

Thermal Diffusivity

48 *mm ^{2}/s*

Thermal Shock Resistance

7.9 *points*

## Alloy Composition

Among cast copper alloys, the composition of C83300 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. It also adds pressure tightness to castings.

Cu | 92 to 94 | |

Zn | 2.0 to 6.0 | |

Sn | 1.0 to 2.0 | |

Pb | 1.0 to 2.0 | |

res. | 0 to 0.7 |

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