1435 (A91435) Aluminum
1435 aluminum is a 1000-series aluminum alloy: it is considered commercially pure, and is formulated for primary forming into wrought products. 1435 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-1435. A91435 is the UNS number.
It originally received its standard designation in 1958.
The properties of 1435 aluminum include five 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 1435 aluminum to: 1000-series alloys (top), all aluminum 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
69 GPa 9.9 x 106 psi
Elongation at Break
4.1 to 32 %
Fatigue Strength
27 to 49 MPa 4.0 to 7.1 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.7 x 106 psi
Shear Strength
54 to 87 MPa 7.8 to 13 x 103 psi
Tensile Strength: Ultimate (UTS)
81 to 150 MPa 12 to 22 x 103 psi
Tensile Strength: Yield (Proof)
23 to 130 MPa 3.3 to 18 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
650 °C 1190 °F
Melting Onset (Solidus)
640 °C 1190 °F
Specific Heat Capacity
900 J/kg-K 0.22 BTU/lb-°F
Thermal Conductivity
230 W/m-K 130 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
60 % IACS
Electrical Conductivity: Equal Weight (Specific)
200 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.0 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.2 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
1190 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
5.0 to 20 MJ/m3
Resilience: Unit (Modulus of Resilience)
3.8 to 110 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
8.3 to 15 points
Strength to Weight: Bending
15 to 23 points
Thermal Diffusivity
93 mm2/s
Thermal Shock Resistance
3.6 to 6.7 points
Alloy Composition
Among wrought aluminum alloys, the composition of 1435 aluminum is notable for containing comparatively high amounts of iron (Fe) and silicon (Si). Most of the time, iron is an impurity in aluminum alloys. However, it may be added in quantity to improve strength (particularly at high temperatures) without much impact on electrical properties. Silicon is used to increase strength at the expense of ductility. It also lowers the melting temperature and raises the fluidity of the alloy.
| Al | 99.35 to 99.7 | |
| Fe | 0.3 to 0.5 | |
| Si | 0 to 0.15 | |
| Zn | 0 to 0.1 | |
| Mn | 0 to 0.050 | |
| Mg | 0 to 0.050 | |
| Ti | 0 to 0.030 | |
| Cu | 0 to 0.020 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B483: Standard Specification for Aluminum and Aluminum-Alloy Drawn Tube and Pipe for General Purpose Applications
Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993