CHEMICAL COMPOSITION

Aluminium:  7.8-9.2%

Zinc:                       0.20-0.8%

Manganese:  0.12-0.5%

Magnesium:  Balance

HEAT TREATMENT

Billets are normally provided fully homogenized to promote ease of forging.

PHYSICAL PROPERTIES

Specific Gravity:                                 1.8

Coefficient of Thermal Expansion:    26 x 10 -6 K -1

Thermal Conductivity:                       76Wm -1 K -1

Specific Heat:                                      1100 Jkg -1 K -1

Electrical Resistivity:                          145 nΩm

Modulus of Elasticity:                        45GPa

Poissons Ratio:                                   0.35

Melting Range:                                   470-595°C

GRAIN STRUCTURE

The grain refinement of forging billets is a key factor affecting the ease of which the metal can be forged.

AZ80A forging billet undergoes a special grain refining process to ensure a fine uniform structure.

Grain size is controlled to below 200 µm for 300mm diameter billet.

AZ80A FORGINGS

DESIGN DATA FOR AZ80A FORGINGS

Specification minimum tensile properties.

AZ80A-T5 Die Forgings

0.2% Proof Stress:         193 MPa

Tensile Strength:           290 MPa

Elongation:                       2%

AZ80-F Die Forgings

0.2% Proof Stress:           179 MPa

Tensile Strength:              290 MPa

Elongation:                       5%

MACHINING

AZ80A, like all magnesium alloy forgings, machines faster than any other metal. Providing the geometry of the part allows, the limiting factor is the power and speed of the machine rather than the quality of the tool material. The power required per cubic centimetre of metal removed varies from 9 to 14 watts per minute depending on the operation.

AZ80A

AZ80A is a wrought magnesium base alloy containing aluminium, zinc and manganese. Increased strength is obtained by artificial aging from the as-fabricated form.

AZ80A has a fine controlled microstructure for improved forging performance and consistent mechanical properties of the forged part.