Aluminum 2017A
AA 2017A · EN AlCu4MgSi, 3.1325 · BS H14 · also Avional
2017A (EN AW-2017A, AlCu4MgSi(A), material 3.1325, historically duralumin/Avional) is a heat-treatable 2000 series Al-Cu alloy usually supplied naturally aged to T4 as bar, profile and sheet.
2017A tempers and conditions
2017A is supplied in 10 conditions, soft to hard.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Choose for deep forming, bending or cold heading of rivets before solution treatment. | 75 | 180 | 22 | 45 HB | 50 % IACS |
Slightly strain hardened | Soft, near-annealed 2017A with only incidental strain hardening from straightening or forming; used as a workable pre-heat-treatment condition. | 100 | 205 | 18 | 52 HB | 50 % IACS |
Re-solution heat treated by the user and naturally aged | Applies to parts formed in O temper and then heat treated by the fabricator; slightly lower and more scattered properties than mill T4. | 235 | 385 | 15 | 103 HB | 34 % IACS |
Solution heat treated, stress-relieved by compression, naturally aged | T4 condition for forgings and hand-forged blocks in which residual stress is removed by cold compression, giving T4-level strength with low distortion on machining. | 250 | 400 | 14 | 105 HB | 34 % IACS |
Extruded, stretched, no further straightening | Stress-relieved extruded bar/profile supplied without post-stretch straightening; used for long machined parts. | 255 | 400 | 13 | 108 HB | 34 % IACS |
Extruded, stretched, minor straightening allowed | Same as T4510 but with a light straightening pass for tighter bar straightness tolerances. | 255 | 400 | 13 | 108 HB | 34 % IACS |
Solution heat treated and naturally aged | The standard commercial condition for 2017A bar, rod and profiles — best all-round strength/toughness for machined fittings, rivets and bolts. | 260 | 410 | 14 | 110 HB | 34 % IACS |
T4, stress relieved by stretching | T4 with controlled stretch — specify for plate and rolled bar that will be machined asymmetrically. | 260 | 405 | 14 | 108 HB | 34 % IACS |
T3, stress relieved by stretching | Stress-relieved plate/bar for machined parts that must stay dimensionally stable after heavy stock removal. | 275 | 420 | 13 | 112 HB | 34 % IACS |
Solution heat treated, cold worked and naturally aged | Cold-worked variant of T4 for sheet and drawn rod where slightly higher strength and straightness are needed. | 290 | 425 | 12 | 115 HB | 34 % IACS |
What is 2017A?
2017A (EN AW-2017A, AlCu4MgSi(A), material 3.1325, historically duralumin/Avional) is a heat-treatable 2000 series Al-Cu alloy usually supplied naturally aged to T4 as bar, profile and sheet. Strength approaches 2024 while forming and machining behaviour is more forgiving, so it is used for rivets, bolts, gear blanks, structural joints and general machined parts. Corrosion resistance is poor and requires cladding, anodizing or paint; fusion welding is not practical, and continuous service should stay below about 120 °C. 2024 is the nearest higher-strength option. 2017A has a density of 2.79 g/cm³ (0.101 lb/in³), heavier than 77% of aluminum grades. It melts at 512°C (954 °F). 2017A has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 410 MPa (59.5 ksi) — stronger than 68% of aluminum grades. Elongation at break is 14% and the elastic modulus is 72.5 GPa (10.5 Msi).
What is 2017A used for?
- Rivets
- Structural plate
- Aircraft fittings
Advantages
- Easy to machine — 75/100, better than 86% of aluminum grades
- Ductile — tolerates forming and impact — 14%, better than 81% of aluminum grades
- Tough — resists crack growth — 30 MPa·√m (27.3 ksi·√in), better than 76% of aluminum grades
Limitations
- Difficult to weld — 20/100, worse than 89% of aluminum grades
- Needs corrosion protection — 35/100, worse than 85% of aluminum grades
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
2017A properties
Typical room-temperature values; bars are the position among aluminum grades.
Physical3
2017A has a density of 2.79 g/cm³ (0.101 lb/in³), heavier than 77% of aluminum grades. It melts at 512°C (954 °F).
Mechanical14
2017A has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 410 MPa (59.5 ksi) — stronger than 68% of aluminum grades. Elongation at break is 14% and the elastic modulus is 72.5 GPa (10.5 Msi).
Thermal6
2017A is rated for continuous service to 120°C (248 °F). It conducts heat at 134 W/m·K (77.4 BTU/hr·ft·°F), worse than 60% of aluminum grades. Thermal expansion is 23 µm/m·K (12.8 µin/in·°F).
Electrical3
2017A conducts electricity at 34 % IACS, worse than 52% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (35/100), worse than 85% of aluminum grades.
Sustainability4
Producing a kilogram of 2017A 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
2017A's machinability is very good (75/100, better than 86% of aluminum grades); weldability poor (20/100); formability fair (45/100).
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. 2017A is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 2017A
Is 2017A easy to machine?
Excellent free-cutting behaviour in T4/T351 with short chips; use sharp polished-flute carbide tools, high speed and flood emulsion to avoid built-up edge.
Can 2017A be welded?
Not suited to fusion (MIG/TIG) welding due to hot cracking and loss of temper — join by riveting, bolting, adhesive or friction stir welding.
Can 2017A be formed, bent or molded?
Form in O temper or within a few hours of solution treatment (refrigerate to delay natural ageing); T4 tolerates only mild bends with generous radii.
Manufacturability
The process limits FabDigit applies to 2017A. Every 2017A part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Excellent75 / 100 |
|---|---|
| ISO material group | N.2 |
| Cutting speed (rough / finish) | 280 / 340 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 6× diameter |
| Best surface (machined / polished) | Ra 0.8 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Fair45 / 100 |
|---|---|
| Weldability | Poor20 / 100 |
2017A 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 | 0.2 – 0.8 | 0.5 |
| Feimpurity | ≤ 0.7 | 0.35 |
| Cuprincipal strengthening element | 3.5 – 4.5 | 4 |
| Mn | 0.4 – 1 | 0.7 |
| Mg | 0.4 – 1 | 0.7 |
| Cr | ≤ 0.1 | |
| Zn | ≤ 0.25 | |
| Ti+Zrcombined limit per EN 573-3 | ≤ 0.25 | |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 2017A?
Requires protection: chromate/chrome-free conversion coating plus paint, or hard anodizing; decorative bright anodizing gives a dull grey, Cu-mottled finish, and cladding or Alclad-type sheet is used for corrosive service.
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).
Passivation
Conversion Coating
PVD Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 2017A in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AlCu4MgSi3.1325
- BS
- H14
- Trade names
- Avional
How much does 2017A cost?
2017A is a premium-cost aluminum ($$$), cheaper than about 60% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
2017A — frequently asked
What is 2017A used for?
2017A is typically used for rivets, structural plate and aircraft fittings. In short: european 2017 variant; rivet stock.
What is the yield strength of 2017A?
2017A has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 410 MPa (59.5 ksi) — stronger than 68% of aluminum grades. Strength varies by condition: see the 10 listed tempers.
Is 2017A easy to machine?
Yes — machinability is rated very good (75/100, better than 86% of aluminum grades). Excellent free-cutting behaviour in T4/T351 with short chips; use sharp polished-flute carbide tools, high speed and flood emulsion to avoid built-up edge.
Can 2017A be welded?
Not readily — weldability is rated poor (20/100). Not suited to fusion (MIG/TIG) welding due to hot cracking and loss of temper — join by riveting, bolting, adhesive or friction stir welding.
What surface finishes work on 2017A?
Requires protection: chromate/chrome-free conversion coating plus paint, or hard anodizing; decorative bright anodizing gives a dull grey, Cu-mottled finish, and cladding or Alclad-type sheet is used for corrosive service.
Can 2017A be formed, bent or molded?
Form in O temper or within a few hours of solution treatment (refrigerate to delay natural ageing); T4 tolerates only mild bends with generous radii.
What is the maximum service temperature of 2017A?
2017A is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 2017A cost?
2017A is a premium-cost aluminum ($$$), cheaper than about 60% 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.
Can FabDigit make parts in 2017A?
Yes — 2017A 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 — CEN (2019)
- 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)
- International Alloy Designations and Chemical Composition Limits (Teal Sheets) — The Aluminum Association (2018)
- DIN 1725 / Werkstoff 3.1325 AlCuMgSi — DIN (1986)
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.