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UNS C66300 Tin Brass

C66300 brass is a brass formulated for primary forming into wrought products. It has a moderately high base cost and a moderately high melting temperature among wrought brasses.

The properties of C66300 brass include nine 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 C66300 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 16 x 106 psi

Elongation at Break

2.3 to 22 %

Poisson's Ratio


Shear Modulus

42 GPa 6.1 x 106 psi

Shear Strength

290 to 470 MPa 42 to 68 x 103 psi

Tensile Strength: Ultimate (UTS)

460 to 810 MPa 66 to 120 x 103 psi

Tensile Strength: Yield (Proof)

400 to 800 MPa 58 to 120 x 103 psi

Thermal Properties

Latent Heat of Fusion

200 J/g

Maximum Temperature: Mechanical

180 °C 350 °F

Melting Completion (Liquidus)

1050 °C 1920 °F

Melting Onset (Solidus)

1000 °C 1830 °F

Specific Heat Capacity

380 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

110 W/m-K 62 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

25 % IACS

Electrical Conductivity: Equal Weight (Specific)

26 % IACS

Otherwise Unclassified Properties

Base Metal Price

29 % relative


8.6 g/cm3 540 lb/ft3

Embodied Carbon

2.8 kg CO2/kg material

Embodied Energy

46 MJ/kg 20 x 103 BTU/lb

Embodied Water

320 L/kg 39 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

17 to 98 MJ/m3

Resilience: Unit (Modulus of Resilience)

710 to 2850 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

15 to 26 points

Strength to Weight: Bending

15 to 22 points

Thermal Diffusivity

32 mm2/s

Thermal Shock Resistance

16 to 28 points

Alloy Composition

Among wrought copper alloys, the composition of C66300 brass is notable for including cobalt (Co). Cobalt is used to improve strength.

Copper (Cu)Cu 84.5 to 87.5
Zinc (Zn)Zn 6.0 to 12.8
Tin (Sn)Sn 1.5 to 3.0
Iron (Fe)Fe 1.4 to 2.4
Phosphorus (P)P 0 to 0.35
Cobalt (Co)Co 0 to 0.2
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

Similar Alloys

Further Reading

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015