Annealed (OS035) C43400 Brass
OS035 C43400 brass is C43400 brass in the OS035 (annealed to 0.035mm grain size) temper. It has the lowest strength and highest ductility compared to the other variants of C43400 brass. The graph bars on the material properties cards below compare OS035 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
49 %
Poisson's Ratio
0.33
Rockwell F Hardness
64
Rockwell Superficial 30T Hardness
22
Shear Modulus
42 GPa 6.1 x 106 psi
Shear Strength
250 MPa 36 x 103 psi
Tensile Strength: Ultimate (UTS)
310 MPa 45 x 103 psi
Tensile Strength: Yield (Proof)
110 MPa 16 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)
120 MJ/m3
Resilience: Unit (Modulus of Resilience)
57 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
10 points
Strength to Weight: Bending
12 points
Thermal Diffusivity
41 mm2/s
Thermal Shock Resistance
11 points
Alloy Composition
| 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
Further Reading
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015