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6463 (AlMg0.7Si(B), A96463) Aluminum

6463 aluminum is a 6000-series aluminum alloy: there is significant alloying with both magnesium and silicon, and the alloy is formulated for primary forming into wrought products. 6463 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-6463. A96463 is the UNS number. Additionally, the EN chemical designation is AlMg0,7Si(B).

It originally received its standard designation in 1957.

The properties of 6463 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 6463 aluminum to: 6000-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

42 to 74

Elastic (Young's, Tensile) Modulus

68 GPa 9.9 x 106 psi

Elongation at Break

9.0 to 17 %

Fatigue Strength

45 to 76 MPa 6.5 to 11 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.7 x 106 psi

Shear Strength

86 to 150 MPa 12 to 22 x 103 psi

Tensile Strength: Ultimate (UTS)

140 to 230 MPa 20 to 34 x 103 psi

Tensile Strength: Yield (Proof)

82 to 200 MPa 12 to 29 x 103 psi

Thermal Properties

Latent Heat of Fusion

400 J/g

Maximum Temperature: Mechanical

160 °C 320 °F

Melting Completion (Liquidus)

660 °C 1210 °F

Melting Onset (Solidus)

620 °C 1140 °F

Specific Heat Capacity

900 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

190 to 210 W/m-K 110 to 120 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

50 to 55 % IACS

Electrical Conductivity: Equal Weight (Specific)

170 to 180 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.7 g/cm3 170 lb/ft3

Embodied Carbon

8.3 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)

17 to 25 MJ/m3

Resilience: Unit (Modulus of Resilience)

50 to 300 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

50 points

Strength to Weight: Axial

14 to 24 points

Strength to Weight: Bending

22 to 31 points

Thermal Diffusivity

79 to 86 m2/s

Thermal Shock Resistance

6.3 to 10 points

Alloy Composition

Among wrought aluminum alloys, the composition of 6463 aluminum is notable for containing comparatively high amounts of magnesium (Mg) and silicon (Si). Magnesium promotes hardenability through both heat treatment and strain hardening mechanisms. It also increases susceptibility to intergranular corrosion. 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) 97.9 to 99.4
Magnesium (Mg) 0.45 to 0.9
Silicon (Si) 0.2 to 0.6
Copper (Cu) 0 to 0.2
Iron (Fe) 0 to 0.15
Manganese (Mn) 0 to 0.050
Zinc (Zn) 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

ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties

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