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UNS C67600 Leaded Manganese Bronze

C67600 bronze is a bronze formulated for primary forming into wrought products. It has a moderately low base cost and a moderately low melting temperature among wrought bronzes.

The properties of C67600 bronze include five common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C67600 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

100 GPa 15 x 106 psi

Elongation at Break

13 to 33 %

Poisson's Ratio

0.31

Shear Modulus

40 GPa 5.8 x 106 psi

Shear Strength

270 to 350 MPa 39 to 50 x 103 psi

Tensile Strength: Ultimate (UTS)

430 to 570 MPa 62 to 83 x 103 psi

Tensile Strength: Yield (Proof)

170 to 380 MPa 25 to 55 x 103 psi

Thermal Properties

Latent Heat of Fusion

170 J/g

Maximum Temperature: Mechanical

120 °C 240 °F

Melting Completion (Liquidus)

890 °C 1630 °F

Melting Onset (Solidus)

870 °C 1590 °F

Specific Heat Capacity

380 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

110 W/m-K 61 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

24 % IACS

Electrical Conductivity: Equal Weight (Specific)

27 % IACS

Otherwise Unclassified Properties

Base Metal Price

23 % relative

Density

8.0 g/cm3 500 lb/ft3

Embodied Carbon

2.8 kg CO2/kg material

Embodied Energy

47 MJ/kg 20 x 103 BTU/lb

Embodied Water

330 L/kg 39 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

63 to 130 MJ/m3

Resilience: Unit (Modulus of Resilience)

140 to 680 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

15 to 20 points

Strength to Weight: Bending

16 to 19 points

Thermal Diffusivity

35 mm2/s

Thermal Shock Resistance

14 to 19 points

Alloy Composition

Among wrought copper alloys, the composition of C67600 bronze is notable for including manganese (Mn) and tin (Sn). Manganese is used to improve strength without a proportional reduction in ductility. Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media.

Copper (Cu) 57 to 60
Zinc (Zn) 35.2 to 41.6
Tin (Sn) 0.5 to 1.5
Iron (Fe) 0.4 to 1.3
Lead (Pb) 0.5 to 1.0
Manganese (Mn) 0.050 to 0.5
Residuals 0 to 0.5

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

Followup Questions

Similar Alloys

Further Reading

ASTM B138: Standard Specification for Manganese Bronze Rod, Bar, and Shapes

ASTM B124: Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes

ASTM B283: Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001