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UNS C43400 Tin Brass

C43400 brass is a brass formulated for primary forming into wrought products. It has a moderately high thermal conductivity among the wrought brasses in the database.

The properties of C43400 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 C43400 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

3.0 to 49 %

Poisson's Ratio

0.33

Rockwell B Hardness

54 to 94

Rockwell Superficial 30T Hardness

22 to 84

Shear Modulus

42 GPa 6.1 x 106 psi

Shear Strength

250 to 390 MPa 36 to 56 x 103 psi

Tensile Strength: Ultimate (UTS)

310 to 690 MPa 45 to 100 x 103 psi

Tensile Strength: Yield (Proof)

110 to 560 MPa 16 to 81 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

1020 °C 1870 °F

Melting Onset (Solidus)

990 °C 1810 °F

Specific Heat Capacity

380 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

140 W/m-K 79 BTU/h-ft-°F

Thermal Expansion

19 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

31 % IACS

Electrical Conductivity: Equal Weight (Specific)

32 % IACS

Otherwise Unclassified Properties

Base Metal Price

28 % relative

Density

8.6 g/cm3 540 lb/ft3

Embodied Carbon

2.7 kg CO2/kg material

Embodied Energy

44 MJ/kg 19 x 103 BTU/lb

Embodied Water

320 L/kg 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

19 to 120 MJ/m3

Resilience: Unit (Modulus of Resilience)

57 to 1420 kJ/m3

Stiffness to Weight: Axial

7.2 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

10 to 22 points

Strength to Weight: Bending

12 to 20 points

Thermal Diffusivity

41 mm2/s

Thermal Shock Resistance

11 to 24 points

Alloy Composition

Among wrought copper alloys, the composition of C43400 brass is notable for including tin (Sn). Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media.

Copper (Cu) 84 to 87
Zinc (Zn) 11.4 to 15.6
Tin (Sn) 0.4 to 1.0
Iron (Fe) 0 to 0.050
Lead (Pb) 0 to 0.050
Residuals 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