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.
| Cu | 84 to 87 | |
| Zn | 11.4 to 15.6 | |
| Sn | 0.4 to 1.0 | |
| Fe | 0 to 0.050 | |
| Pb | 0 to 0.050 | |
| res. | 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