Aluminum 7017-O (Annealed)
Temper
AA 7017 · EN AW-7017, AW 7017
Softest condition for maximum cold forming or deep drawing before solution treatment and ageing.
Values for the O condition
Other 7017 tempers and conditions
7017 is listed in 6 conditions; see the grade overview at 7017.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
OThis page Annealed | Softest condition for maximum cold forming or deep drawing before solution treatment and ageing. | 110 | 225 | 18 | 65 HB | 40 % IACS |
Solution heat treated and naturally aged | Intermediate-strength, more formable condition; also represents the naturally re-aged strength recovered in weld HAZ. | 250 | 380 | 16 | 105 HB | 33 % IACS |
T73, stress relieved by stretching | Best combination for thick machined structures: SCC-resistant overaged microstructure with low residual stress and good toughness. | 340 | 412 | 12 | 126 HB | 38 % IACS |
Solution heat treated and overaged for stress-corrosion resistance | Choose when stress-corrosion cracking or exfoliation risk governs (marine, thick sections, sustained tensile stress), accepting ~10 % lower strength. | 350 | 420 | 12 | 128 HB | 38 % IACS |
T6, stress relieved by stretching | Standard supply condition for 7017 armour and structural plate: T6 strength with low residual stress for flat, stable machined parts. | 390 | 455 | 11 | 138 HB | 32 % IACS |
Solution heat treated and artificially aged | Peak-strength temper for structural plate and armour; highest strength but the most SCC/exfoliation sensitive. | 400 | 460 | 11 | 140 HB | 32 % IACS |
What is 7017-O?
7017-O is 7017 in the O temper — softest condition for maximum cold forming or deep drawing before solution treatment and ageing. 7017-O has a yield strength of 110 MPa (16 ksi) and a tensile strength of 225 MPa (32.6 ksi) — weaker than 81% of aluminum grades. Elongation at break is 18% and the elastic modulus is 70 GPa (10.2 Msi). 7017-O has a density of 2.78 g/cm³ (0.1 lb/in³), heavier than 74% of aluminum grades. It melts at 590°C (1,094 °F).
Advantages
- Forms and bends easily — 80/100, better than 89% of aluminum grades
- Ductile — tolerates forming and impact — 18%, better than 86% of aluminum grades
- Tough — resists crack growth — 32 MPa·√m (29.1 ksi·√in), better than 83% of aluminum grades
- Conducts heat well — 165 W/m·K (95.3 BTU/hr·ft·°F), better than 79% of aluminum grades
Limitations
- Low strength — 110 MPa (16 ksi), worse than 81% of aluminum grades
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
7017-O properties
Typical room-temperature values for 7017-O; 10 are specific to this condition. Other listed values are 7017 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
7017-O has a density of 2.78 g/cm³ (0.1 lb/in³), heavier than 74% of aluminum grades. It melts at 590°C (1,094 °F).
Mechanical12
7017-O has a yield strength of 110 MPa (16 ksi) and a tensile strength of 225 MPa (32.6 ksi) — weaker than 81% of aluminum grades. Elongation at break is 18% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
7017-O is rated for continuous service to 120°C (248 °F). It conducts heat at 165 W/m·K (95.3 BTU/hr·ft·°F), better than 79% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
7017-O conducts electricity at 40 % IACS, better than 72% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 51% of aluminum grades.
Sustainability4
Producing a kilogram of 7017-O takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 25%.
Manufacturability8
7017-O's machinability is fair (45/100, worse than 72% of aluminum grades); weldability very good (72/100); formability very good (80/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 7017-O
Is 7017 easy to machine?
Machines well in T6/T651 with sharp carbide tools, high speeds and generous coolant; chips are short and finishes are good, but relieve residual stress (T651/T7351) before heavy asymmetric machining to avoid distortion.
Can 7017 be welded?
Its selling point — MIG/TIG weldable with 5356 or 5183 filler; the HAZ naturally re-ages to a large fraction of parent strength, but avoid restrained joints and consider post-weld ageing/overageing to limit HAZ stress-corrosion cracking.
Can 7017 be formed, bent or molded?
Form in O or T4; peak-aged plate has limited bend ductility (use generous bend radii, warm forming or form-then-age).
What surface finishes work on 7017?
Anodizes and paints well after proper deoxidising; clear anodic films tend slightly grey, and chromate-free primers plus paint are standard for armour and marine service.
7017 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 | ≤ 0.35 | |
| Fe | ≤ 0.45 | |
| Cumax; essentially Cu-free to keep weldability | ≤ 0.2 | |
| Mn | 0.05 – 0.5 | 0.3 |
| Mg | 2 – 3 | 2.5 |
| Crmax; limit varies between standard editions | ≤ 0.35 | |
| Zn | 4 – 5.2 | 4.6 |
| Zrgrain-structure/recrystallisation control | 0.1 – 0.25 | 0.16 |
| Ti | ≤ 0.15 | |
| Others (each)0.15 total | ≤ 0.05 | |
| Al | balance |
7017-O — frequently asked
What is 7017-O used for?
7017-O is typically used for armour plate for military vehicles, combat vehicle hulls, welded military structures, rail vehicle structures, high-strength welded plate assemblies and military bridging and shelter structures. In short: armor plate alloy.
What is the yield strength of 7017-O?
7017-O has a typical yield strength of 110 MPa (16 ksi) and a tensile strength of 225 MPa (32.6 ksi) — weaker than 81% of aluminum grades. Strength varies by condition: see the 6 listed tempers.
Is 7017-O easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 72% of aluminum grades). Machines well in T6/T651 with sharp carbide tools, high speeds and generous coolant; chips are short and finishes are good, but relieve residual stress (T651/T7351) before heavy asymmetric machining to avoid distortion.
Can 7017-O be welded?
Yes — weldability is rated very good (72/100). Its selling point — MIG/TIG weldable with 5356 or 5183 filler; the HAZ naturally re-ages to a large fraction of parent strength, but avoid restrained joints and consider post-weld ageing/overageing to limit HAZ stress-corrosion cracking.
What surface finishes work on 7017-O?
Anodizes and paints well after proper deoxidising; clear anodic films tend slightly grey, and chromate-free primers plus paint are standard for armour and marine service.
Can 7017-O be formed, bent or molded?
Form in O or T4; peak-aged plate has limited bend ductility (use generous bend radii, warm forming or form-then-age).
What is the maximum service temperature of 7017-O?
7017-O 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.
Can FabDigit make parts in 7017-O?
Yes — 7017-O is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- EN 573-3 Aluminium and aluminium alloys — Chemical composition (EN AW-7017) — CEN (2019)
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum Alloys (Teal Sheets) — The Aluminum Association (2018)
- EN 485-2 Aluminium and aluminium alloys — Sheet, strip and plate: mechanical properties — CEN (2016)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (aluminium alloys) — ASM International (2005)
- Published research and producer data on 7017 armour-grade aluminium plate — various (peer-reviewed literature) (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.