Aluminum	Balance
Chromium	0.18 - 0.25
Copper	1.2 - 1.9
Iron	0.12 max
Magnesium	1.9 - 2.6
Manganese	0.06 max
Remainder Each	0.05 max
Remainder Total	0.15 max
Silicon	0.1 max
Titanium	0.06 max
Zinc	5.2 - 6.2

Principal Design Features		This is a high strength alloy of very good toughness. It is a derivative of AL 7075 alloy and the AL 7475 version is available in sheet and plate product forms.

Applications		Commonly used in the manufacture of shell casings, aircraft, and other structures.

Machinability		Machining characteristics are very good in the annealed condition. Use of oil base lubricants for all machining operations is recommended.

Forming		This alloy may be formed by conventional methods. However forming is easier in the annealed condition because in the heat treated (hardened) condition the alloy has more springback due to its strength. Use of warming at 250 F will assist in forming, especially for spinning. Optimum formability is with the material in the W (quenched) condition.

Welding		Not normally done to this alloy and no data on techniques available at this time.

Heat Treatment		Heat treatment may be done. However the parameters of the treatment are proprietary to Alcoa. Heat treat information is available from Alcoa on a non-disclosure agreement basis.

Forging		No data available.

Hot Working		No hot work data available. However use of warming at 250 F for annealed stock is conducive to forming operations such as spinning.

Cold Working		The alloy in the annealed condition is readily cold worked using conventional means. In the heat treated tempers it is more difficult to form because of it greater strength. See also "Forming".

Annealing		Proprietary data. Consult Alcoa.

Aging		Proprietary data. Consult Alcoa.

Tempering		Not applicable to this alloy.

Hardening		Proprietary data. Consult Alcoa.

Physical Data : [top]

Density (lb / cu. in.)	0.101
Specific Gravity	2.81
Melting Point (Deg F)	1015
Poissons Ratio	0.33
Modulus of Elasticity Tension	10.2
Modulus of Elasticity Torsion	3.9

Form	Sheet
Condition	T61
Temperature	-320
Tensile Strength	99
Yield Strength	87
Elongation	10
Form	Sheet
Condition	T61
Temperature	-112
Tensile Strength	88
Yield Strength	79
Elongation	12
Form	Sheet
Condition	T61
Temperature	-18
Tensile Strength	84
Yield Strength	75
Elongation	12
Form	Sheet
Condition	T61
Temperature	75
Tensile Strength	80
Yield Strength	72
Elongation	12
Form	Sheet
Condition	T61
Temperature	212
Tensile Strength	70
Yield Strength	65
Elongation	14
Form	Sheet
Condition	T61
Temperature	300
Tensile Strength	30
Yield Strength	26
Elongation	28
Form	Sheet
Condition	T61
Temperature	400
Tensile Strength	14
Yield Strength	11
Elongation	55
Form	Sheet
Condition	T61
Temperature	500
Tensile Strength	9.5
Yield Strength	7
Elongation	70
Form	Sheet
Condition	T61
Temperature	600
Tensile Strength	6.5
Yield Strength	5.5
Elongation	80
Form	Sheet
Condition	T61
Temperature	700
Tensile Strength	5
Yield Strength	3.8
Elongation	85
Form	Sheet
Condition	T761
Temperature	-320
Tensile Strength	95
Yield Strength	82
Elongation	11
Form	Sheet
Condition	T761
Temperature	-112
Tensile Strength	84
Yield Strength	73
Elongation	12
Form	Sheet
Condition	T761
Temperature	-18
Tensile Strength	80
Yield Strength	70
Elongation	12
Form	Sheet
Condition	T761
Temperature	75
Tensile Strength	76
Yield Strength	67
Elongation	12
Form	Sheet
Condition	T761
Temperature	212
Tensile Strength	64
Yield Strength	61
Elongation	14
Form	Sheet
Condition	T761
Temperature	300
Tensile Strength	30
Yield Strength	26
Elongation	38
Form	Sheet
Condition	T761
Temperature	400
Tensile Strength	14
Yield Strength	11
Elongation	55
Form	Sheet
Condition	T761
Temperature	500
Tensile Strength	9.5
Yield Strength	7
Elongation	70
Form	Sheet
Condition	T761
Temperature	600
Tensile Strength	6.5
Yield Strength	5.5
Elongation	80
Form	Sheet
Condition	T761
Temperature	700
Tensile Strength	5
Yield Strength	3.8
Elongation	85

[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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