Aluminum 7022
AA 7022 · EN AlZn5Mg3Cu, 3.4345
7022 is a Cu-bearing Al-Zn-Mg high-strength alloy (AlZn5Mg3Cu, EN AW-7022, material 3.4345) supplied in O, T6, T651, T6510 and T6511 for structural forgings and extrusions.
Reference datasheet — 7022 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the T651 condition
7022 tempers and conditions
7022 is supplied in 5 conditions, soft to hard. T651 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum formability or as an intermediate condition before solution treatment; strength is low and must be restored by T6 ageing. | 120 | 240 | 15 | 68 HB | 39 % IACS |
Solution heat treated and artificially aged | Standard peak-aged condition for extrusions, bar and forgings when maximum static strength is required and residual stress is not critical. | 460 | 520 | 8 | 148 HB | 32 % IACS |
Solution treated, stress-relieved by stretching, aged; no further… | Choose for extrusions and drawn bar that will be CNC-machined asymmetrically — stretched stress relief with no post-straightening keeps distortion minimal. | 465 | 520 | 8 | 149 HB | 32 % IACS |
T6, stress relieved by stretching, minor straightening | Same as T6510 but with a small straightening allowance, so it is the usual supply condition for long extruded profiles and rod with tight straightness limits. | 465 | 520 | 8 | 149 HB | 32 % IACS |
T651Default T6, stress relieved by stretching | Default stocked condition for thick plate and tooling/mould plate — peak strength with low residual stress so heavily machined parts stay flat. | 470 | 530 | 8 | 150 HB | 32 % IACS |
What is 7022?
7022 is a Cu-bearing Al-Zn-Mg high-strength alloy (AlZn5Mg3Cu, EN AW-7022, material 3.4345) supplied in O, T6, T651, T6510 and T6511 for structural forgings and extrusions. It is chosen when higher strength than 7020 or 7021 is needed while keeping reasonable toughness, offering 470 MPa yield, 530 MPa tensile, 8% elongation and 150 HB, with a machinability score of 75. The copper content makes it effectively non-weldable (score 20), formability is low (score 22), corrosion resistance is moderate (score 45) and service temperature is capped near 120 °C. 7075 is the closest widely stocked alternative. 7022 has a density of 2.78 g/cm³ (0.1 lb/in³), heavier than 74% of aluminum grades. It melts at 475°C (887 °F). 7022 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 530 MPa (76.9 ksi) — stronger than 93% of aluminum grades. Elongation at break is 8% and the elastic modulus is 70 GPa (10.2 Msi).
What is 7022 used for?
- Structural forgings
- Military vehicle components
- High-strength extrusions
Advantages
- High strength — 470 MPa (68.2 ksi), better than 93% of aluminum grades
- Polishes to a fine finish — 72/100, better than 89% of aluminum grades
- Easy to machine — 75/100, better than 86% of aluminum grades
Limitations
- Difficult to weld — 20/100, worse than 89% of aluminum grades
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
7022 properties
Typical room-temperature values for 7022-T651; bars are the position among aluminum grades.
Physical3
7022 has a density of 2.78 g/cm³ (0.1 lb/in³), heavier than 74% of aluminum grades. It melts at 475°C (887 °F).
Mechanical15
7022 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 530 MPa (76.9 ksi) — stronger than 93% of aluminum grades. Elongation at break is 8% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
7022 is rated for continuous service to 120°C (248 °F). It conducts heat at 145 W/m·K (83.8 BTU/hr·ft·°F), better than 53% of aluminum grades. Thermal expansion is 23.5 µm/m·K (13.1 µin/in·°F).
Electrical3
7022 conducts electricity at 32 % IACS, worse than 63% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (45/100), worse than 62% of aluminum grades.
Sustainability4
Producing a kilogram of 7022 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 20%.
Manufacturability8
7022's machinability is very good (75/100, better than 86% of aluminum grades); weldability poor (20/100); formability poor (22/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. 7022 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 7022
Is 7022 easy to machine?
Machines very freely in T6/T651 with sharp polished-flute carbide, high speed and copious coolant; chips are short and surfaces take a fine finish.
Can 7022 be welded?
Not recommended for fusion welding because of the Cu content (hot cracking and severe HAZ loss); use mechanical fastening, adhesive bonding or friction stir where qualified.
Can 7022 be formed, bent or molded?
Form in the O or freshly solution-treated condition — T6/T651 material has low ductility and generous bend radii are mandatory; hot forge above ~400 °C.
7022 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Si | ≤ 0.5 | 0.15 |
| Fe | ≤ 0.5 | 0.25 |
| Cu | 0.5 – 1 | 0.75 |
| Mn | 0.1 – 0.4 | 0.25 |
| Mg | 2.6 – 3.7 | 3.1 |
| Cr | 0.1 – 0.3 | 0.2 |
| Zn | 4.3 – 5.2 | 4.8 |
| TiTi (+Zr where specified) limited as grain-refiner residual | ≤ 0.2 | 0.03 |
| Others (each)0.15 % total | ≤ 0.05 | |
| Al | balance |
What surface finishes work on 7022?
Responds well to hard and sulphuric anodising (slightly grey tone), chromate/chrome-free conversion coating and paint; polish before anodising for mould surfaces.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 7022 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AlZn5Mg3Cu3.4345AW-7022
How much does 7022 cost?
7022 is a premium-cost aluminum ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
7022 — frequently asked
What is 7022 used for?
7022 is typically used for structural forgings, military vehicle components and high-strength extrusions. In short: stronger than 7020; forging and extrusion grade; not arc weldable.
What is the yield strength of 7022?
7022 has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 530 MPa (76.9 ksi) — stronger than 93% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is 7022 easy to machine?
Yes — machinability is rated very good (75/100, better than 86% of aluminum grades). Machines very freely in T6/T651 with sharp polished-flute carbide, high speed and copious coolant; chips are short and surfaces take a fine finish.
Can 7022 be welded?
Not readily — weldability is rated poor (20/100). Not recommended for fusion welding because of the Cu content (hot cracking and severe HAZ loss); use mechanical fastening, adhesive bonding or friction stir where qualified.
What surface finishes work on 7022?
Responds well to hard and sulphuric anodising (slightly grey tone), chromate/chrome-free conversion coating and paint; polish before anodising for mould surfaces.
Can 7022 be formed, bent or molded?
Form in the O or freshly solution-treated condition — T6/T651 material has low ductility and generous bend radii are mandatory; hot forge above ~400 °C.
What is the maximum service temperature of 7022?
7022 is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 7022-T651 and 7022-O?
T651 is the default condition — default stocked condition for thick plate and tooling/mould plate — peak strength with low residual stress so heavily machined parts stay flat. O: pick for maximum formability or as an intermediate condition before solution treatment; strength is low and must be restored by T6 ageing. Yield strength is 470 MPa in T651 versus 120 MPa in O.
How much does 7022 cost?
7022 is a premium-cost aluminum ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 573-3 Aluminium and aluminium alloys — chemical composition — CEN (2019)
- EN 485-2 Aluminium sheet, strip and plate — mechanical properties — CEN (2018)
- EN 755-2 Aluminium extruded rod/bar, tube and profiles — mechanical properties — CEN (2016)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- High-strength AlZnMgCu (7022-type) mould plate datasheets — European aluminium plate producers (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.