Aluminum Sheet
7075-T651 Aluminium Plate
7075-T651 Aluminium Plate
7075 aluminium plate is a typical high strength alloy plate of 7xxx series alloy, also counted as one of the few highest strength alloys in aluminum alloy plate.
Zinc is the primary alloying element giving it strength comparable to steel.
It has good plasticity after solid solution treatment, excellent heat treatment strengthening effect, high strength below 150 degrees, and good low-temperature strength and welding performance.
It tends to stress corrosion cracking, double-stage aging can improve anti-SCC performance.
It is mainly used in manufacturing aircraft structures and other high-stress structural parts requiring high strength and corrosion resistance,
such as aircraft upper and lower airfoil wall panels and trusses.
It is also widely used in the mold processing, mechanical equipment, tooling, fixtures, etc.
Alloy – temper ：
7075 – T651
Characteristics :
High strength heat treatable alloy.
Good mechanical properties.
Good serviceability.
Easy to machine, good wear resistance.
Good corrosion resistance and oxidation resistance.
7075 Aluminium Plate abilities
Temper
O
T6
T651
T7x51
Gauge
4.0 – 150mm
Width
1100 – 2000mm
Length
2000 – 6000mm
Standard
EN 485
ASTM B 209
Package
Technical Data Sheet
| Element | Percentage |
|---|---|
| Al | 90 |
| Cr | 0.18 – 0.28 |
| Cu | 1.2 – 2 |
| Fe | 0.05 max |
| Mg | 2.1 – 2.9 |
| Mn | 0.3 max |
| Si | 0.4 max |
| Ti | 0.2 max |
| Zn | 5.1 – 6.1 |
| Zn + Ti | 0.25 max |
| Weldability | poor |
| Cutting properties | well |
| Corrosion resistance | normal |
| Electrical conductivity | 40-50%IACS (20℃/68℉) |
| Density | 2.85 g/cm3 (20℃) |
| Tensile strength | 570 MPa |
| Yield strength | 505 MPa |
| Hardness Brinell | 150 |
| Elongation | 11% |
| Maximum shear stress | 330 MP |
Heat treatment
Zinc is the primary alloying element in 7075.
Zinc is the primary alloying element in 7075. Adding magnesium to a 7075 alloy containing 3%-7.5% zinc can form a significantly strengthened MgZn2, making the heat treatment effect of this alloy far superior to that of aluminum-zinc binary alloys. By increasing the zinc and magnesium content of the alloy, the tensile strength will be further improved, but its resistance to stress corrosion and to spalling corrosion will then be reduced.
The 7075 material is generally alloyed with a small amount of copper and chromium. 7075-T651 is mainly well known as the best aluminum alloys with high strength and far superior to any soft steel.
Typical Applications
7075 aluminum plate is most commonly used in aerospace, mold processing, mechanical equipment, jigs, and fixtures, especially for aircraft manufacturing structures and structural bodies with high strength requirements and corrosion resistance.
It is also used on trucks, towers, boats, pipelines, and other constructions where strength, weldability, and corrosion resistance are required. Examples include blown film, golf heads, shoe film, turbines, keys, aircraft and even missile parts, jump-in valve parts, etc.
Performance of 7075 Aluminium plate with different heat treatments
O
After solution heat treatment, natural aging, and cold working state, suitable for hard products worked to improve their strength.
T6
The solution heat treatment is followed by artificial aging. Applicable to products that are no longer cold worked after solution heat treatment (straightening and leveling can be carried out but do not affect the mechanical properties).
T651
Applicable to thick plates that have been drawn in specified amounts after solution heat treatment or since the cooling of the high temperature forming process.
T73
After solution heat treatment, aging treatment was carried out for optimum stress corrosion cracking resistance.
T7351
The solution heat treatment is followed by the tensile removal of residual stresses by permanent deformation and natural aging.
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