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3203 Aluminum

3203 aluminum is a 3000-series aluminum alloy: the main alloying addition is manganese, and it is formulated for primary forming into wrought products. 3203 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-3203. Additionally, the UNS number is A93203.

It originally received its standard designation in 1973.

It can have the highest ductility among the 3000-series alloys in the database.

The properties of 3203 aluminum 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 3203 aluminum to: 3000-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

70 GPa 10 x 106 psi

Elongation at Break

4.5 to 29 %

Fatigue Strength

46 to 92 MPa 6.6 to 13 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.8 x 106 psi

Shear Strength

72 to 120 MPa 10 to 17 x 103 psi

Tensile Strength: Ultimate (UTS)

110 to 200 MPa 16 to 29 x 103 psi

Tensile Strength: Yield (Proof)

39 to 190 MPa 5.7 to 27 x 103 psi

Thermal Properties

Latent Heat of Fusion

400 J/g

Maximum Temperature: Mechanical

180 °C 360 °F

Melting Completion (Liquidus)

650 °C 1200 °F

Melting Onset (Solidus)

620 °C 1160 °F

Specific Heat Capacity

900 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

170 W/m-K 100 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

43 % IACS

Electrical Conductivity: Equal Weight (Specific)

140 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.0 % relative

Density

2.8 g/cm3 170 lb/ft3

Embodied Carbon

8.1 kg CO2/kg material

Embodied Energy

150 MJ/kg 66 x 103 BTU/lb

Embodied Water

1180 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

8.0 to 25 MJ/m3

Resilience: Unit (Modulus of Resilience)

11 to 250 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

50 points

Strength to Weight: Axial

11 to 20 points

Strength to Weight: Bending

19 to 28 points

Thermal Diffusivity

70 mm2/s

Thermal Shock Resistance

4.9 to 8.8 points

Alloy Composition

Among wrought aluminum alloys, the composition of 3203 aluminum is notable for containing a comparatively high amount of manganese (Mn). Manganese is used to improve strength without a proportional reduction in ductility. It also improves workability by controlling the grain structure of the alloy.

Aluminum (Al) 96.9 to 99
Manganese (Mn) 1.0 to 1.5
Iron (Fe) 0 to 0.7
Silicon (Si) 0 to 0.6
Zinc (Zn) 0 to 0.1
Copper (Cu) 0 to 0.050
Residuals 0 to 0.15

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

Followup Questions

Similar Alloys

Further Reading

Handbook of Aluminum Bonding Technology and Data, J. D. Minford, 1993

Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984

ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993