Aluminum 2017A-T451
Temper
AA 2017A · EN AlCu4MgSi, 3.1325 · BS H14 · also Avional
T451 = t4, stress relieved by stretching
T4 with controlled stretch — specify for plate and rolled bar that will be machined asymmetrically.
Values for the T451 condition
Other 2017A tempers and conditions
2017A is listed in 10 conditions; see the grade overview at 2017A.
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 |
T451This page 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-T451?
2017A-T451 is 2017A in the T451 temper — t4 with controlled stretch — specify for plate and rolled bar that will be machined asymmetrically. 2017A-T451 has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 405 MPa (58.7 ksi) — stronger than 68% of aluminum grades. Elongation at break is 14% and the elastic modulus is 72.5 GPa (10.5 Msi). 2017A-T451 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).
Advantages
- Easy to machine — 78/100, better than 89% 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-T451 properties
Typical room-temperature values for 2017A-T451; 20 are specific to this condition. Other listed values are 2017A reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
2017A-T451 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-T451 has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 405 MPa (58.7 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-T451 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-T451 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-T451 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-T451's machinability is very good (78/100, better than 89% of aluminum grades); weldability poor (20/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 2017A-T451
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.
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.
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 | — |
2017A-T451 — frequently asked
What is 2017A-T451 used for?
2017A-T451 is typically used for rivets, structural plate and aircraft fittings. In short: european 2017 variant; rivet stock.
What is the yield strength of 2017A-T451?
2017A-T451 has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 405 MPa (58.7 ksi) — stronger than 68% of aluminum grades. Strength varies by condition: see the 10 listed tempers.
Is 2017A-T451 easy to machine?
Yes — machinability is rated very good (78/100, better than 89% 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-T451 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-T451?
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-T451 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-T451?
2017A-T451 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 2017A-T451?
Yes — 2017A-T451 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.