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Annealed (OS050) C26800 Brass

OS050 C26800 brass is C26800 brass in the OS050 (annealed to 0.050mm grain size) temper. It has the second lowest strength and highest ductility compared to the other variants of C26800 brass. The graph bars on the material properties cards below compare OS050 C26800 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 106 psi

Elongation at Break

62 %

Fatigue Strength

85 MPa 12 x 103 psi

Poisson's Ratio

0.31

Rockwell F Hardness

64

Shear Modulus

40 GPa 5.9 x 106 psi

Shear Strength

230 MPa 33 x 103 psi

Tensile Strength: Ultimate (UTS)

330 MPa 47 x 103 psi

Tensile Strength: Yield (Proof)

110 MPa 15 x 103 psi

Thermal Properties

Latent Heat of Fusion

180 J/g

Maximum Temperature: Mechanical

130 °C 270 °F

Melting Completion (Liquidus)

930 °C 1710 °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

27 % IACS

Electrical Conductivity: Equal Weight (Specific)

30 % IACS

Otherwise Unclassified Properties

Base Metal Price

24 % relative

Calomel Potential

-360 mV

Density

8.1 g/cm3 510 lb/ft3

Embodied Carbon

2.7 kg CO2/kg material

Embodied Energy

45 MJ/kg 19 x 103 BTU/lb

Embodied Water

320 L/kg 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

160 MJ/m3

Resilience: Unit (Modulus of Resilience)

52 kJ/m3

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 mm2/s

Thermal Shock Resistance

11 points

Alloy Composition

Copper (Cu) 64 to 68.5
Zinc (Zn) 31 to 36
Lead (Pb) 0 to 0.15
Iron (Fe) 0 to 0.050
Residuals 0 to 0.3

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

Followup Questions

Further Reading

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