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Soft Annealed (O60) C52100 Bronze

O60 C52100 bronze is C52100 bronze in the O60 (soft annealed) temper. The graph bars on the material properties cards below compare O60 C52100 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 B Hardness

45

Rockwell Superficial 30T Hardness

48

Shear Modulus

41 GPa 6.0 x 106 psi

Tensile Strength: Ultimate (UTS)

420 MPa 60 x 103 psi

Thermal Properties

Latent Heat of Fusion

200 J/g

Maximum Temperature: Mechanical

180 °C 350 °F

Melting Completion (Liquidus)

1030 °C 1880 °F

Melting Onset (Solidus)

880 °C 1620 °F

Specific Heat Capacity

370 J/kg-K 0.089 BTU/lb-°F

Thermal Conductivity

62 W/m-K 36 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

13 % IACS

Electrical Conductivity: Equal Weight (Specific)

13 % IACS

Otherwise Unclassified Properties

Base Metal Price

34 % relative

Density

8.8 g/cm3 550 lb/ft3

Embodied Carbon

3.4 kg CO2/kg material

Embodied Energy

55 MJ/kg 24 x 103 BTU/lb

Embodied Water

370 L/kg 44 gal/lb

Common Calculations

Stiffness to Weight: Axial

7.0 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

13 points

Strength to Weight: Bending

14 points

Thermal Diffusivity

19 mm2/s

Thermal Shock Resistance

15 points

Alloy Composition

Copper (Cu)Cu 89.8 to 93
Tin (Sn)Sn 7.0 to 9.0
Phosphorus (P)P 0.030 to 0.35
Zinc (Zn)Zn 0 to 0.2
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

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