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Soft Annealed (O60) C51000 Bronze

O60 C51000 bronze is C51000 bronze in the O60 (soft annealed) temper. It has the second lowest strength compared to the other variants of C51000 bronze. The graph bars on the material properties cards below compare O60 C51000 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

110 GPa 16 x 106 psi

Poisson's Ratio

0.34

Rockwell Superficial 30T Hardness

42

Shear Modulus

42 GPa 6.1 x 106 psi

Tensile Strength: Ultimate (UTS)

340 MPa 50 x 103 psi

Thermal Properties

Latent Heat of Fusion

200 J/g

Maximum Temperature: Mechanical

190 °C 370 °F

Melting Completion (Liquidus)

1050 °C 1930 °F

Melting Onset (Solidus)

960 °C 1770 °F

Specific Heat Capacity

380 J/kg-K 0.090 BTU/lb-°F

Thermal Conductivity

77 W/m-K 44 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

18 % IACS

Electrical Conductivity: Equal Weight (Specific)

18 % IACS

Otherwise Unclassified Properties

Base Metal Price

33 % relative

Density

8.8 g/cm3 550 lb/ft3

Embodied Carbon

3.1 kg CO2/kg material

Embodied Energy

50 MJ/kg 21 x 103 BTU/lb

Embodied Water

350 L/kg 42 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

7.0 to 490 MJ/m3

Resilience: Unit (Modulus of Resilience)

75 to 2490 kJ/m3

Stiffness to Weight: Axial

7.0 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

11 points

Strength to Weight: Bending

12 points

Thermal Diffusivity

23 mm2/s

Thermal Shock Resistance

12 points

Alloy Composition

Copper (Cu)Cu 92.9 to 95.5
Tin (Sn)Sn 4.5 to 5.8
Phosphorus (P)P 0.030 to 0.35
Zinc (Zn)Zn 0 to 0.3
Iron (Fe)Fe 0 to 0.1
Lead (Pb)Pb 0 to 0.050
Residualsres. 0 to 0.5

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

Followup Questions

Further Reading

ASTM B139: Standard Specification for Phosphor Bronze Rod, Bar, and Shapes

ASTM B103: Standard Specification for Phosphor Bronze Plate, Sheet, Strip, and Rolled Bar

Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001