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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.

Aluminum (Al) 99.35 to 99.7
Iron (Fe) 0.3 to 0.5
Silicon (Si) 0 to 0.15
Zinc (Zn) 0 to 0.1
Manganese (Mn) 0 to 0.050
Magnesium (Mg) 0 to 0.050
Titanium (Ti) 0 to 0.030
Copper (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