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6101B (AlMgSi(B), 3.3207) Aluminum

6101B 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. 6101B is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-6101B. AlMgSi(B) is the EN chemical designation.

It originally received its standard designation in 1979.

The properties of 6101B aluminum include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 6101B 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

Elastic (Young's, Tensile) Modulus

68 GPa 9.9 x 106 psi

Elongation at Break

9.1 to 13 %

Fatigue Strength

62 to 70 MPa 9.0 to 10 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.7 x 106 psi

Shear Strength

120 to 150 MPa 17 to 21 x 103 psi

Tensile Strength: Ultimate (UTS)

190 to 250 MPa 28 to 36 x 103 psi

Tensile Strength: Yield (Proof)

140 to 180 MPa 20 to 26 x 103 psi

Thermal Properties

Latent Heat of Fusion

400 J/g

Maximum Temperature: Mechanical

160 °C 320 °F

Melting Completion (Liquidus)

640 °C 1190 °F

Melting Onset (Solidus)

630 °C 1170 °F

Specific Heat Capacity

900 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

210 W/m-K 120 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

57 % IACS

Electrical Conductivity: Equal Weight (Specific)

190 % 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)

20 to 23 MJ/m3

Resilience: Unit (Modulus of Resilience)

140 to 240 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

50 points

Strength to Weight: Axial

20 to 25 points

Strength to Weight: Bending

27 to 32 points

Thermal Diffusivity

87 mm2/s

Thermal Shock Resistance

8.5 to 11 points

Alloy Composition

Among wrought aluminum alloys, the composition of 6101B 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) 98.2 to 99.3
Magnesium (Mg) 0.35 to 0.6
Silicon (Si) 0.3 to 0.6
Iron (Fe) 0.1 to 0.3
Zinc (Zn) 0 to 0.1
Manganese (Mn) 0 to 0.050
Copper (Cu) 0 to 0.050
Residuals 0 to 0.1

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

Followup Questions

Similar Alloys

Further Reading

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

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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015