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