MAGNESIUM ALLOYS


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Magnesium Alloys
Magnesium Alloys
Magnesium Alloys

Magnesium alloys have traditionally been specified by designers because of their favourable strength to weight ratios. Magnesium is approximately two thirds the density of aluminium and a quarter that of steel. Some of the more recently developed magnesium alloys have also improved resistance to corrosion and better all round mechanical properties, especially at elevated temperature.

The growing number of available magnesium alloys are divided into two groups: casting alloys and wrought alloys. Wrought product forms (described below) include both extruded sections and rolled sheet/plate along with tubes and forgings. Various heat treatments are used to attain maximum strength and machining of most magnesium alloys is excellent.

Applications for magnesium alloys can be found in aerospace and motorsport sectors where strength combined with reduced weight are of critical importance. Gearbox components, pistons and casings are typical applications. Magnesium forgings are becoming more popular with designers for high temperature applications. New alloys continue to be developed and more recent applications have included electronics and nuclear engineering.

Nearest Equivalent Specification

Available Products

AZ31

A medium strength magnesium alloy used in sheet and extrusion forms at relatively low temperatures. The alloy is weldable and can be formed easily. Good corrosion resistance.

AMS

4375, 4376
4377, 4382

AZ61

A medium strength general purpose magnesium alloy containing aluminium, zinc and manganese. The alloy is gas arc weldable.

BS
AMS

L503, L512, L513
4350

AZ80

A high strength magnesium alloy used in extrusions and simple forging forms. Aluminium, manganese and zinc are the major alloying elements.

AMS
FED

4360
QQ-M-31B & 44B

WE43

A high strength magnesium alloy with good properties at elevated temperatures. Excellent corrosion resistance due to addition of yttrium. TIG weldable and usually heat treated.

UNS

M18430

WE54

A high strength magnesium alloy close to WE43 in composition but with superior mechanical properties. Corrosion resistance and weldability are excellent. Usually heat treated.

UNS

M18410

ZK60

A high strength magnesium alloy often used in forgings for relatively low temperature applications. Not easily welded and heat treatment is required to obtain strength characteristics.

AMS
FED

4352, 4362
QQ-M-40

ZM21

A medium strength magnesium alloy used is sheet and extrusion forms. Fully weldable using the argon gas process and easily formed.

BS

3370, 3372,
3373

ZW3

A high strength magnesium alloy containing zinc and zirconium. Mainly used in forgings and extrusions. This alloy is weldable in normal conditions.

BS
BS

L505, L514
3372, 3373

Casting Alloys

AM50, AM60, A281, AZ91, EQ21, EZ33, EV31, WE43, WE54, ZE41