7039 aluminium alloy

AA 7039 is an aluminum alloy principally containing zinc (3.5–4.5%) as an alloying element. It is heat treatable wrought aluminum alloy. It is used for making armour suites.

Chemical Composition

No	Element	Content (%)
1	Aluminum, Al	Remainder
2	Zinc, Zn	3.5 - 4.5
3	Magnesium, Mg	2.3 - 3.3
4	Silicon, Si	0.3 max
5	Iron, Fe	0.4 max
6	Chromium, Cr	0.15 - 0.25
7	Manganese, Mn	0.1 - 0.4
8	Copper, Cu	0.1 max
9	Titanium, Ti	0.1 max
10	Remainder (total)	0.15 max

Physical Properties

No	Properties	Metric
1	Density	2.74 g/cm3
2	Melting point	482-638°C

Mechanical Properties

No	Properties	Metric
1	Tensile strength	450 MPa
2	Yield strength	380 MPa
3	Elongation at break	13%
4	Elastic modulus	69.6 GPa
5	Shear strength	255 MPa

For more properties, visit

1. Aluminum 7039-T61 Properties
2. Aluminum 7039-T64 Properties

Applications

Aluminium 7039 alloy is chiefly used as an armor alloy. It is used for making armor suite.

Further reading

• "Properties of Wrought Aluminum and Aluminum Alloys: 7039", Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, Vol 2, ASM Handbook, ASM International, 1990, p. 109-111.
• Mechanical and ballistic properties of powder metal 7039 aluminium alloy joined by friction stir welding
• Anderson, Kevin; Weritz, John; Kaufman, J. Gilbert, eds. (2019). "7039: Armor Plate". Properties and Selection of Aluminum Alloys. 2B: 418–419. doi:10.31399/asm.hb.v02b.a0006730.