Aluminum	Balance
Chromium	0.05 - 0.2
Copper	0.1 max
Iron	0.4 max
Magnesium	4.7 - 5.5
Manganese	0.5 - 1
Remainder Each	0.05 max
Remainder Total	0.15 max
Silicon	0.25 max
Titanium	0.2 max
Zinc	0.25 max

Principal Design Features		This is an alloy of aluminum and magnesium with good strength. It does not respond to hardening by heat treatment. The alloy is good for structural use because of its good weldability.

Applications		Commonly used in the manufacture of high strength welded structures, pressure vessels, marine applications, and in storage tanks.

Machinability		Generally difficult to machine. Carbide tooling and oil lubricants should be used.

Forming		Forming of this alloy is more difficult than for other aluminum alloys. It requires generous bend radius and should not be severely cold worked. See "Cold Working".

Welding		Arc welding is best for this alloy and this makes it useful for structural applications. Gas welding may be used, but results are less favorable than for arc welding.

Heat Treatment		Not hardenable by heat treatment. See "Annealing".

Forging		No data.

Hot Working		Hot working of this alloy may be done at 425 F. This will avoid imparting high stress into heavily cold worked shapes.

Cold Working		The alloy may be readily cold worked. However severe cold working (over 20 % reduction) should be avoided as this may make the part subject to stress corrosion cracking in application where temperatures can reach 150 F.

Annealing		Anneal at 650 F and air cool.

Aging		Not applicable to this alloy.

Tempering		Not applicable.

Hardening		Hardens due to cold working only and the amount of cold work should be limited. See "Cold Working".

Other Physical Props		Electrical conductivity is 32% of copper.

Other Mechanical Props		Shear strengths for various tempers are: O temper, 28 ksi. H321, 30 ksi. H311, 28 ksi

Physical Data : [top]

Density (lb / cu. in.)	0.096
Specific Gravity	2.66
Melting Point (Deg F)	1065
Modulus of Elasticity Tension	10.3

There is no Mechnical data available for this grade.

[top]
Nickel - www.nidi.org

Copper - www.copper.org

Titanium - www.titanium.org

Steel Lynx - www.mlc.lib.mi.us/~stewarca/steelynx.html

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