OEM 7079 Forging Aluminum Parts For Skeleton Large Die Forged Spare Parts

Hardness, Brinell

150

150

AA; Typical; 500 g load; 10 mm ball

Hardness, Knoop

191

191

Converted from Brinell Hardness Value

Hardness, Rockwell A

53.5

53.5

Converted from Brinell Hardness Value

Hardness, Rockwell B

87

87

Converted from Brinell Hardness Value

Hardness, Vickers

175

175

Converted from Brinell Hardness Value

Ultimate Tensile Strength

572 MPa

83000 psi

AA; Typical

Tensile Yield Strength

503 MPa

73000 psi

AA; Typical

Elongation at Break

11 %

11 %

AA; Typical; 1/16 in. (1.6 mm) Thickness

Elongation at Break

11 %

11 %

AA; Typical; 1/2 in. (12.7 mm) Diameter

Modulus of Elasticity

71.7 GPa

10400 ksi

AA; Typical; Average of tension and compression. The compression modulus is about 2% greater than tensile modulus.

Poisson’s Ratio

0.33

0.33

Fatigue Strength

159 MPa

23000 psi

AA; 500,000,000 cycles completely reversed stress; RR Moore machine/specimen

Fracture Toughness

20 MPa-m½

18.2 ksi-in½

K(IC) in S-L Direction

Fracture Toughness

25 MPa-m½

22.8 ksi-in½

K(IC) in T-L Direction

Fracture Toughness

29 MPa-m½

26.4 ksi-in½

K(IC) in L-T Direction

Machinability

70 %

70 %

0-100 Scale of Aluminum Alloys

Shear Modulus

26.9 GPa

3900 ksi

Shear Strength

331 MPa

48000 psi

AA; Typical

CTE, linear 68°F

23.6 µm/m-°C

13.1 µin/in-°F

AA; Typical; Average over 68-212°F range.

CTE, linear 250°C

25.2 µm/m-°C

14 µin/in-°F

Average over the range 20-300ºC

Specific Heat Capacity

0.96 J/g-°C

0.229 BTU/lb-°F

Thermal Conductivity

130 W/m-K

900 BTU-in/hr-ft²-°F

AA; Typical at 77°F

Melting Point

477 – 635 °C

890 – 1175 °F

AA; Typical range based on typical composition for wrought products 1/4 inch thickness or more significant. Homogenization may raise the eutectic melting temperature by 20-40°F but usually does not eliminate eutectic melting.

Solidus

477 °C

890 °F

AA; Typical

Liquidus

635 °C

1175 °F

AA; Typical