Aluminum 2A17
GB 2A17
2A17 (LY17) is a heat-resistant Al-Cu structural alloy of the 2000-series family, offered in O, T4, T6, T651, T62 and H112 for high-temperature aerospace and engine hardware.
Reference datasheet — 2A17 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 T6 condition
2A17 tempers and conditions
2A17 is supplied in 6 conditions, soft to hard. T6 is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition for deep forming, bending or straightening before heat treatment. | 95 | 210 | 18 | 48 HB | 45 % IACS |
Strain hardened from hot working only | Mill-supplied hot-worked stock intended for subsequent solution treatment and ageing. | 150 | 260 | 14 | 65 HB | 42 % IACS |
Solution heat treated and naturally aged | Pick when moderate strength with better ductility/formability is needed before final artificial ageing. | 235 | 380 | 14 | 100 HB | 30 % IACS |
T6, heat treated by the user | For parts formed or welded in the soft state and then fully heat treated to T6-level strength. | 310 | 430 | 8 | 116 HB | 35 % IACS |
T6, stress relieved by stretching | Choose for thick plate or bar that will be heavily machined and must stay dimensionally stable. | 315 | 430 | 8 | 118 HB | 35 % IACS |
T6Default Solution heat treated and artificially aged | Standard supply and service condition: peak strength plus retained strength at 200–300 °C. | 320 | 440 | 9 | 120 HB | 35 % IACS |
What is 2A17?
2A17 (LY17) is a heat-resistant Al-Cu structural alloy of the 2000-series family, offered in O, T4, T6, T651, T62 and H112 for high-temperature aerospace and engine hardware. It combines 320 MPa yield, 440 MPa tensile, 9 % elongation and 120 HB with a 250 °C service ceiling, above what 2024-class alloys tolerate, and machines well (72/100). Ductility and formability are low (30/100), corrosion resistance is poor without coating and stock availability is limited; 2A16 is the lower-strength, more weldable alternative. 2A17 has a density of 2.84 g/cm³ (0.103 lb/in³), heavier than 93% of aluminum grades. It melts at 540°C (1,004 °F). 2A17 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 440 MPa (63.8 ksi) — stronger than 80% of aluminum grades. Elongation at break is 9% and the elastic modulus is 72 GPa (10.4 Msi).
What is 2A17 used for?
- High-temperature structural parts
- Engine components
- Airframe structure near heat sources
- Forged and machined hot-zone fittings
- Heat-resistant plate for brackets
- Welded elevated-temperature assemblies
Advantages
- High service temperature — 250°C (482 °F), better than 97% of aluminum grades
- High strength — 320 MPa (46.4 ksi), better than 80% of aluminum grades
- Easy to machine — 72/100, better than 80% of aluminum grades
Limitations
- Needs corrosion protection — 30/100, worse than 98% of aluminum grades
2A17 properties
Typical room-temperature values for 2A17-T6; bars are the position among aluminum grades.
Physical3
2A17 has a density of 2.84 g/cm³ (0.103 lb/in³), heavier than 93% of aluminum grades. It melts at 540°C (1,004 °F).
Mechanical13
2A17 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 440 MPa (63.8 ksi) — stronger than 80% of aluminum grades. Elongation at break is 9% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal6
2A17 is rated for continuous service to 250°C (482 °F). It conducts heat at 130 W/m·K (75.1 BTU/hr·ft·°F), worse than 65% of aluminum grades. Thermal expansion is 22.6 µm/m·K (12.6 µin/in·°F).
Electrical3
2A17 conducts electricity at 35 % IACS, better than 52% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is poor (30/100), worse than 98% of aluminum grades.
Sustainability4
Producing a kilogram of 2A17 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 10%.
Manufacturability8
2A17's machinability is very good (72/100, better than 80% of aluminum grades); weldability good (58/100); formability poor (30/100).
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. 2A17 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 2A17
Is 2A17 easy to machine?
Machines well in T6 with sharp carbide tools, high speeds and flood coolant; gummy and prone to built-up edge in O/T4.
Can 2A17 be welded?
One of the more fusion-weldable 2000-series grades (TIG/MIG with Al-Cu or Al-Si-free Cu-bearing filler); expect strength loss in the HAZ unless re-solution treated and aged (T62).
Can 2A17 be formed, bent or molded?
Form in O or freshly quenched T4 (within a few hours); T6 material has low ductility and needs generous bend radii or hot forming at 200–300 °C.
2A17 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 |
|---|---|---|
| Cuprimary strengthening element | 6 – 7 | 6.5 |
| Mndispersoid for high-temperature stability | 0.4 – 0.8 | 0.6 |
| Mgdistinguishes 2A17 from 2A16 | 0.25 – 0.45 | 0.35 |
| Tigrain refinement | 0.1 – 0.2 | 0.15 |
| Siimpurity limit | ≤ 0.3 | |
| Feimpurity limit | ≤ 0.3 | |
| Znimpurity limit | ≤ 0.1 | |
| Niimpurity limit | ≤ 0.1 | |
| Other (each)others total ≤ 0.15 | ≤ 0.05 | |
| Al | balance |
What surface finishes work on 2A17?
Anodizes to a dull, darker film because of high Cu; use chromic/sulfuric anodize plus chromate-free primer, or clad sheet, for corrosion protection.
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 2A17 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- LY17
How much does 2A17 cost?
2A17 is a high-cost aluminum ($$$$), pricier than about 78% 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.
2A17 — frequently asked
What is 2A17 used for?
2A17 is typically used for high-temperature structural parts, engine components, airframe structure near heat sources, forged and machined hot-zone fittings, heat-resistant plate for brackets and welded elevated-temperature assemblies. In short: heat-resistant high-strength 2000 series; 440 MPa at 250 °C service; low formability, good machining.
What is the yield strength of 2A17?
2A17 has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 440 MPa (63.8 ksi) — stronger than 80% of aluminum grades. Strength varies by condition: see the 6 listed tempers.
Is 2A17 easy to machine?
Yes — machinability is rated very good (72/100, better than 80% of aluminum grades). Machines well in T6 with sharp carbide tools, high speeds and flood coolant; gummy and prone to built-up edge in O/T4.
Can 2A17 be welded?
Yes — weldability is rated good (58/100). One of the more fusion-weldable 2000-series grades (TIG/MIG with Al-Cu or Al-Si-free Cu-bearing filler); expect strength loss in the HAZ unless re-solution treated and aged (T62).
What surface finishes work on 2A17?
Anodizes to a dull, darker film because of high Cu; use chromic/sulfuric anodize plus chromate-free primer, or clad sheet, for corrosion protection.
Can 2A17 be formed, bent or molded?
Form in O or freshly quenched T4 (within a few hours); T6 material has low ductility and needs generous bend radii or hot forming at 200–300 °C.
What is the maximum service temperature of 2A17?
2A17 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 2A17-T6 and 2A17-O?
T6 is the default condition — standard supply and service condition: peak strength plus retained strength at 200–300 °C. O: softest condition for deep forming, bending or straightening before heat treatment. Yield strength is 320 MPa in T6 versus 95 MPa in O.
How much does 2A17 cost?
2A17 is a high-cost aluminum ($$$$), pricier than about 78% 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
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
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.