# UNS C50100 Phosphor Bronze

C50100 bronze is a bronze formulated for primary forming into wrought products. Cited properties are appropriate for the O61 (annealed) temper.

It has the highest melting temperature among wrought bronzes. In addition, it has a moderately high electrical conductivity and a fairly low tensile strength.

The graph bars on the material properties cards below compare C50100 bronze to: wrought bronzes (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

120 *GPa* 17 *x 10 ^{6} psi*

Elongation at Break

40 *%*

Poisson's Ratio

0.34

Rockwell Superficial 30T Hardness

35

Shear Modulus

43 *GPa* 6.2 *x 10 ^{6} psi*

Shear Strength

180 *MPa* 26 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

270 *MPa* 39 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

82 *MPa* 12 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

210 *J/g*

Maximum Temperature: Mechanical

200 *°C* 390 *°F*

Melting Completion (Liquidus)

1080 *°C* 1980 *°F*

Melting Onset (Solidus)

1070 *°C* 1950 *°F*

Specific Heat Capacity

380 *J/kg-K* 0.092 *BTU/lb-°F*

Thermal Conductivity

230 *W/m-K* 130 *BTU/h-ft-°F*

Thermal Expansion

17 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

55 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

55 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

31 *% relative*

Density

8.9 *g/cm ^{3}* 560

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

42 *MJ/kg* 18 *x 10 ^{3} BTU/lb*

Embodied Water

310 *L/kg* 37 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

82 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

29 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.2 *points*

Stiffness to Weight: Bending

18 *points*

Strength to Weight: Axial

8.3 *points*

Strength to Weight: Bending

10 *points*

Thermal Diffusivity

66 *mm ^{2}/s*

Thermal Shock Resistance

9.5 *points*

## Alloy Composition

Among wrought copper alloys, the composition of C50100 bronze is notable for including phosphorus (P) and tin (Sn). Phosphorus is used as an alloy deoxidizer, and to reduce vulnerability to dezincification. Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media.

Cu | 98.6 to 99.49 | |

Sn | 0.5 to 0.8 | |

P | 0.010 to 0.050 | |

Fe | 0 to 0.050 | |

Pb | 0 to 0.050 | |

res. | 0 to 0.5 |

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