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8176 (8176-H24, AlFeSi) Aluminum

8176 aluminum is an otherwise-unclassified alloy of aluminum. Cited properties are appropriate for the H24 temper. To achieve this temper, the metal is strain hardened, and then partially annealed, to a strength that is roughly halfway between annealed (O) and full-hard (H28). 8176 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-8176. AlFeSi is the EN chemical designation. Additionally, the UNS number is A98176.

It originally received its standard designation in 1976.

It has the highest electrical conductivity among the otherwise unclassified aluminums in the database.

The graph bars on the material properties cards below compare 8176 aluminum to: otherwise unclassified aluminums (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 10 x 106 psi

Elongation at Break

15 %

Fatigue Strength

59 MPa 8.5 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.8 x 106 psi

Shear Strength

70 MPa 10 x 103 psi

Tensile Strength: Ultimate (UTS)

160 MPa 23 x 103 psi

Tensile Strength: Yield (Proof)

95 MPa 14 x 103 psi

Thermal Properties

Latent Heat of Fusion

400 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

660 °C 1210 °F

Melting Onset (Solidus)

650 °C 1190 °F

Specific Heat Capacity

900 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

230 W/m-K 130 BTU/h-ft-°F

Thermal Expansion

24 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

61 % IACS

Electrical Conductivity: Equal Weight (Specific)

200 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % 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)

21 MJ/m3

Resilience: Unit (Modulus of Resilience)

66 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

50 points

Strength to Weight: Axial

16 points

Strength to Weight: Bending

24 points

Thermal Diffusivity

93 mm2/s

Thermal Shock Resistance

7.0 points

Alloy Composition

Aluminum (Al) 98.6 to 99.6
Iron (Fe) 0.4 to 1.0
Silicon (Si) 0.030 to 0.15
Zinc (Zn) 0 to 0.1
Gallium (Ga) 0 to 0.030
Residuals 0 to 0.15

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

Followup Questions

Similar Alloys

Further Reading

ASTM B800: Standard Specification for 8000 Series Aluminum Alloy Wire for Electrical Purposes - Annealed and Intermediate Tempers

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

Aluminum Standards and Data, Aluminum Association Inc., 2013

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

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