Aluminum alloy 7075 is an aluminum alloy, with zinc as the primary
alloying element.aluminum 7075 (Al-Zn-Mg-Cu) belongs to super-hard
aluminum. As a kind of cold finished wrought alloy, it has great
strength and hardness. It’s far better than mild steel. This alloy has
good mechanical properties and anode reaction. It is strong, with a
strength comparable to many steels, and has good fatigue strength and
average machinability. Aluminium 7050 plate
It has lower resistance to corrosion than many other Al alloys, but
has significantly better corrosion resistance than the 2000 alloys. Its
relatively high cost limits its use to applications where cheaper alloys
are not suitable.aluminum 7075 as a typical kind of aerospace aluminum
alloy material is usually used for high-end fields. 7075 aluminum
alloy’s composition roughly includes 5.6–6.1% zinc, 2.1–2.5% magnesium,
1.2–1.6% copper, and less than a half percent of silicon, iron,
manganese, titanium, chromium, and other metals. It is produced in many
tempers, some of which are 7075-0, 7075-T6, 7075-T651.
aluminum 7050 Mechanical properties
7075-0
Un-heat-treated 7075 (7075-0 temper) has maximum tensile strength no
more than 280 MPa (40,000 psi), and maximum yield strength no more than
140 MPa (21,000 psi). The material has an elongation (stretch before
ultimate failure) of 9–10%. It is very highly corrosion-resistant and
has good strength.
7075-T6
T6 temper 7075 has an ultimate tensile strength of 510–540 MPa
(74,000–78,000 psi) and yield strength of at least 430–480 MPa
(63,000–69,000 psi). It has a failure elongation of 5–11%.
The T6 temper is usually achieved by homogenizing the cast 7075 at
450 °C for several hours, quenching, and then aging at 120 °C for 24
hours. This yields the peak strength of the 7075 alloy. The strength is
derived mainly from finely dispersed eta and eta’ precipitates both
within grains and along grain boundaries.
7075-T651
T651 temper 7075 has an ultimate tensile strength of 570 MPa (83,000
psi) and yield strength of 500 MPa (73,000 psi). It has a failure
elongation of 3–9%. These properties can change depending on the form of
material used. Thicker plate may exhibit lower strengths and elongation
than the numbers listed above.
7075-T7
T7 temper has an ultimate tensile strength of 505 MPa (73,200 psi)
and a yield strength of 435 MPa (63,100 psi). It has a failure
elongation of 13%.[5] T7 temper is achieved by overaging (meaning aging
past the peak hardness) the material. This is often accomplished by
aging at 100–120 °C for several hours and then at 160–180 °C for 24
hours or more. The T7 temper produces a micro-structure of mostly eta
precipitates. In contrast to the T6 temper, these eta particles are much
larger and prefer growth along the grain boundaries. This reduces the
susceptibility to stress corrosion cracking. T7 temper is equivalent to
T73 temper.
7075-RRA
The retrogression and reage (RRA) temper is a multistage heat
treatment temper. Starting with a sheet in the T6 temper, it involves
overaging past peak hardness (T6 temper) to near the T7 temper. A
subsequent reaging at 120 °C for 24 hours returns the hardness and
strength to or very nearly to T6 temper levels.
RRA treatments can be accomplished with many different procedures.
The general guidelines are retrogressing between 180–240 °C for 15 min
10 s.
Aluminium plate can be divided into different alloy grades according
to the different alloying elements, different alloy grades of aluminium
plate has a different range of applications.Today we explain to you
guys what is the difference between aluminium 7075 ,aluminium 6063 and
aluminium 6061?
1：Different alloy composition
aluminium 6063 and aluminium 6061 is belongs to 6 series aluminium
plate,6 series is aluminium, magnesium, silicon alloy, 7075 aluminium
alloy elements is Aluminium and zinc.
6061 aluminium and aluminium 6063 is more subtle differences, the
silicon content of the first one is between 0.4 and 0.8.Magnesium
content in 0.8-1.2. But 6063 silicon content in 0.2-0.6, Magnesium
content 0.45-0.9. Because of silicon and magnesium content. General said
6061 in terms of hardness is better than 6063. 6061 and 6063 have a
great difference in the tensile strength. As the annealing and quenching
is different, both in the same condition the former tensile strength is
less than or equal to 150-290 and the latter is less than or equal to
135-240.
2:Different product uses
Aluminium 7075 used in the manufacture of aircraft structure and other
requirements of high strength, high corrosion resistance of high stress
structure parts, mold manufacturing.
Aluminium 6063 for building profiles, and irrigation pipe for vehicle,
bench, furniture, fences etc. with the extrusion materials.
Aluminium 6061 requires a certain strength, higher resistance to the
various industrial structure. Such as the manufacture of trucks, tower
buildings, ships, electric cars, furniture, machinery parts, precision
machining, such as the use of tubes, rods, shaped wood, sheet metal.
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Alloys of the 1xxx, 3xxx, 4xxx, 5xxx, 6xxx and 8xxx series
