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4032 (4032-T6, AlSi12.5MgCuNi) Aluminum

4032 aluminum is a 4000-series aluminum alloy. The main alloying addition is silicon. Cited properties are appropriate for the T6 temper. To achieve this temper, the metal is solution heat-treated and artificially aged until it meets standard mechanical property requirements. 4032 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-4032. Additionally, the EN chemical designation is AlSi12,5MgCuNi. The British Standard (BS) designation is DTD324B. The AFNOR (French) designation is A-S12UGN. And the UNS number is A94032.

It originally received its standard designation in 1954.

It has the highest tensile strength among the 4000-series alloys in the database.

The graph bars on the material properties cards below compare 4032 aluminum to: 4000-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

Brinell Hardness

120

Elastic (Young's, Tensile) Modulus

73 GPa 11 x 106 psi

Elongation at Break

6.7 %

Fatigue Strength

110 MPa 16 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

28 GPa 4.0 x 106 psi

Shear Strength

260 MPa 38 x 103 psi

Tensile Strength: Ultimate (UTS)

390 MPa 56 x 103 psi

Tensile Strength: Yield (Proof)

320 MPa 46 x 103 psi

Thermal Properties

Latent Heat of Fusion

570 J/g

Maximum Temperature: Mechanical

180 °C 350 °F

Melting Completion (Liquidus)

570 °C 1060 °F

Melting Onset (Solidus)

530 °C 990 °F

Specific Heat Capacity

900 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

140 W/m-K 80 BTU/h-ft-°F

Thermal Expansion

19 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

34 % IACS

Electrical Conductivity: Equal Weight (Specific)

120 % IACS

Otherwise Unclassified Properties

Base Metal Price

10 % relative

Density

2.6 g/cm3 160 lb/ft3

Embodied Carbon

7.8 kg CO2/kg material

Embodied Energy

140 MJ/kg 61 x 103 BTU/lb

Embodied Water

1030 L/kg 120 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

25 MJ/m3

Resilience: Unit (Modulus of Resilience)

700 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

53 points

Strength to Weight: Axial

41 points

Strength to Weight: Bending

45 points

Thermal Diffusivity

59 m2/s

Thermal Shock Resistance

20 points

Alloy Composition

Among wrought aluminum alloys, the composition of 4032 aluminum is notable for containing a comparatively high amount of silicon (Si) and including nickel (Ni). Silicon is used to increase strength at the expense of ductility. It also lowers the melting temperature and raises the fluidity of the alloy. Nickel is used to increase mechanical strength at elevated temperatures, and to reduce thermal expansion. However, it can increase susceptibility to pitting corrosion in certain alloys.

Aluminum (Al) 81.1 to 87.2
Silicon (Si) 11 to 13.5
Magnesium (Mg) 0.8 to 1.3
Nickel (Ni) 0.5 to 1.3
Copper (Cu) 0.5 to 1.3
Iron (Fe) 0 to 1.0
Zinc (Zn) 0 to 0.25
Chromium (Cr) 0 to 0.1
Residuals 0 to 0.15

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B247: Standard Specification for Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring Forgings

Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002

Aluminum Standards and Data, Aluminum Association Inc., 2013

ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993

EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products