AZ31B-O

Material Data Sheet

AZ31B-O magnesium is AZ31B magnesium in the annealed condition. It has the lowest strength and highest ductility compared to the other variants of AZ31B magnesium. 

Chemical Composition

 

 

ElementContent (%)
Magnesium, Mg96.0
Aluminum, Al2.5 – 3.5
Zinc, Zn0.6 – 1.4
Manganese, Mn≤ 0.20
Silicon, Si≤ 0.10
Copper, Cu≤ 0.05
Calcium, Ca≤ 0.04
Iron, Fe≤ 0.005
Nickel, Ni≤ 0.005
Physical Properties
Properties Metric Imperial
Density 1.77 g/cc 0.0639 lb/in³
Melting Point 605 – 630 °C 1120 – 1170 °F
Mechanical Properties
Properties Metric Imperial
Hardness, Brinell 56 56
Hardness, Knoop 71 71
Hardness, Vickers 83 83
Tensile Strength, Ultimate 255 MPa 37000 psi
Tensile Strength, Yield 150 MPa 21800 psi
Elongation at Break 21% 21%
Tensile Modulus 45.0 GPa 6530 ksi
Compressive Yield Strength 110 MPa 16000 psi
Ultimate Bearing Strength 485 MPa 70300 psi
Bearing Yield Strength 290 MPa 42100 psi
Poissons Ratio 0.35 0.35
Fatigue Strength 120 – 145 MPa 17400 – 21000 psi
Machinability 100% 100%
Shear Modulus 17.0 GPa 2470 ksi
Shear Strength 145 MPa 21000 psi
Applications

Forgings in AZ31B-O find application in high strength
parts for:

  • Aircraft Fuselage
  • Cell phones and camera cases
  • Textile Machinery
  • Concrete Tools

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