# Annealed (OS050) C33000 Brass

OS050 C33000 brass is C33000 brass in the OS050 (annealed to 0.050mm grain size) temper. It has the lowest strength and highest ductility compared to the other variants of C33000 brass. The graph bars on the material properties cards below compare OS050 C33000 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

110 *GPa* 15 *x 10 ^{6} psi*

Elongation at Break

60 *%*

Poisson's Ratio

0.31

Rockwell F Hardness

64

Rockwell Superficial 30T Hardness

26

Shear Modulus

40 *GPa* 5.9 *x 10 ^{6} psi*

Shear Strength

240 *MPa* 35 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

320 *MPa* 47 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

110 *MPa* 16 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

180 *J/g*

Maximum Temperature: Mechanical

130 *°C* 270 *°F*

Melting Completion (Liquidus)

940 *°C* 1720 *°F*

Melting Onset (Solidus)

900 *°C* 1660 *°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

20 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

26 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

29 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

24 *% relative*

Density

8.2 *g/cm ^{3}* 510

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

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

Embodied Water

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

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

150 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

60 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.2 *points*

Stiffness to Weight: Bending

19 *points*

Strength to Weight: Axial

11 *points*

Strength to Weight: Bending

13 *points*

Thermal Diffusivity

37 *mm ^{2}/s*

Thermal Shock Resistance

11 *points*

## Alloy Composition

Cu | 65 to 68 | |

Zn | 30.8 to 34.8 | |

Pb | 0.25 to 0.7 | |

Fe | 0 to 0.070 | |

res. | 0 to 0.4 |

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