Aluminum 2419
AA 2419 · UNS A92419
2419 is an Al-Cu (2000 series) plate alloy, UNS A92419, a higher-toughness variant related to 2024 for fracture-critical aerospace structure.
Reference datasheet — 2419 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 T851 condition
2419 tempers and conditions
2419 is supplied in 10 conditions, soft to hard. T851 is the default FabDigit quotes; the values on this page are for it.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition for heavy forming, flattening or machining before solution treatment. | 76 | 172 | 18 | 46 HB | 44 % IACS |
Solution treated, cold worked ~1 %, naturally aged | Intermediate temper supplied for forming/welding of tank barrels before final artificial ageing to T81/T87. | 250 | 360 | 17 | 100 HB | 28 % IACS |
T3, stress relieved by stretching | Low-residual-stress plate for rough machining of large parts that are later aged to T851. | 250 | 360 | 16 | 100 HB | 28 % IACS |
T6, heat treated by the user | Applied to weldments and formed parts that must be re-solution-treated and aged after fabrication. | 290 | 415 | 10 | 115 HB | 30 % IACS |
Solution treated, cold worked ~7 %, naturally aged | Heavily stretched intermediate temper used as the precursor to the high-strength T87 condition. | 315 | 395 | 11 | 117 HB | 28 % IACS |
Solution treated, compressively stress-relieved, artificially aged | Hand and die forgings (bulkheads, fittings) where low residual stress is needed before deep machining. | 345 | 440 | 8 | 128 HB | 30 % IACS |
T851Default T8, stress relieved by stretching | The standard damage-tolerant plate temper: best combination of strength, fracture toughness and machining stability. | 350 | 455 | 10 | 130 HB | 30 % IACS |
Solution treated, cold worked ~1 %, artificially aged | Sheet/thin-plate service temper with good strength retention at elevated temperature after welding and ageing. | 350 | 455 | 10 | 130 HB | 30 % IACS |
Solution treated, stretched with minor straightening, artificially aged | Extruded stringers, frames and rings needing T8-level strength with controlled residual stress. | 360 | 460 | 9 | 132 HB | 30 % IACS |
T8 with 7 % cold work | Highest-strength standard temper, used for launch-vehicle tank plate and welded pressure structure. | 395 | 475 | 10 | 135 HB | 30 % IACS |
What is 2419?
2419 is an Al-Cu (2000 series) plate alloy, UNS A92419, a higher-toughness variant related to 2024 for fracture-critical aerospace structure. Unlike most 2000-series alloys it is readily fusion welded with 2319 filler, so it is used for thick machined and welded plate assemblies; the default condition gives 350 MPa yield, 455 MPa tensile, 10 % elongation, 130 HB and service to 175 °C. Cold formability in T8 tempers is limited and bare surfaces pit in chloride environments, so anodize or clad plus primer is required. 2024 plate is the non-weldable alternative. 2419 has a density of 2.84 g/cm³ (0.103 lb/in³), heavier than 93% of aluminum grades. It melts at 543°C (1,009 °F). 2419 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 455 MPa (66 ksi) — stronger than 83% of aluminum grades. Elongation at break is 10% and the elastic modulus is 73.1 GPa (10.6 Msi).
What is 2419 used for?
- Aircraft structural plate
- Wing spars
- Fuselage bulkheads and frames
- Welded aerospace tank and pressure structures
- Machined ribs and fittings from thick plate
- Elevated-temperature airframe structure to 175 °C
Advantages
- Tough — resists crack growth — 40 MPa·√m (36.4 ksi·√in), better than 98% of aluminum grades
- Easy to machine — 75/100, better than 86% of aluminum grades
- High strength — 350 MPa (50.8 ksi), better than 83% of aluminum grades
- High service temperature — 175°C (347 °F), better than 83% of aluminum grades
Limitations
- Needs corrosion protection — 33/100, worse than 91% of aluminum grades
- Poor heat conductor — 120 W/m·K (69.3 BTU/hr·ft·°F), worse than 80% of aluminum grades
2419 properties
Typical room-temperature values for 2419-T851; bars are the position among aluminum grades.
Physical3
2419 has a density of 2.84 g/cm³ (0.103 lb/in³), heavier than 93% of aluminum grades. It melts at 543°C (1,009 °F).
Mechanical14
2419 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 455 MPa (66 ksi) — stronger than 83% of aluminum grades. Elongation at break is 10% and the elastic modulus is 73.1 GPa (10.6 Msi).
Thermal6
2419 is rated for continuous service to 175°C (347 °F). It conducts heat at 120 W/m·K (69.3 BTU/hr·ft·°F), worse than 80% of aluminum grades. Thermal expansion is 22.3 µm/m·K (12.4 µin/in·°F).
Electrical3
2419 conducts electricity at 30 % IACS, worse than 73% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is poor (33/100), worse than 91% of aluminum grades.
Sustainability4
Producing a kilogram of 2419 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 5%.
Manufacturability6
2419's machinability is very good (75/100, better than 86% of aluminum grades); weldability very good (72/100); formability fair (35/100).
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. 2419 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 2419
Is 2419 easy to machine?
Machines well in T8 tempers with short chips; use sharp carbide tooling, high speed, generous coolant, and expect distortion if pre-stretched (T351/T851) plate is machined unevenly.
Can 2419 be welded?
One of the few readily fusion-weldable 2000-series alloys — GTAW/GMAW or FSW with 2319 filler; post-weld solution treat and age (T62) or age (T81/T87) to restore strength.
Can 2419 be formed, bent or molded?
Form in O or T3x tempers; T8 tempers have limited cold ductility and need generous bend radii or warm forming, with stretch-formed panels aged after shaping.
2419 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 |
|---|---|---|
| Siimpurity limit tighter than 2219 | ≤ 0.15 | |
| Feimpurity limit tighter than 2219 — key to toughness | ≤ 0.18 | |
| Cu | 5.8 – 6.8 | 6.3 |
| Mn | 0.2 – 0.4 | 0.3 |
| Mg | ≤ 0.02 | |
| Zn | ≤ 0.1 | |
| Ti | 0.02 – 0.1 | 0.06 |
| V | 0.05 – 0.15 | 0.1 |
| Zr | 0.1 – 0.25 | 0.18 |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 2419?
Protect with chromic/sulfuric anodize plus primer or with alclad/paint systems; bare surfaces pit readily in chloride environments and copper content dulls anodic film color.
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 2419 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A92419
How much does 2419 cost?
2419 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.
2419 — frequently asked
What is 2419 used for?
2419 is typically used for aircraft structural plate, wing spars, fuselage bulkheads and frames, welded aerospace tank and pressure structures, machined ribs and fittings from thick plate and elevated-temperature airframe structure to 175 °C. In short: weldable 2000-series plate; higher toughness than 2024; 175 °C service capability.
What is the yield strength of 2419?
2419 has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 455 MPa (66 ksi) — stronger than 83% of aluminum grades. Strength varies by condition: see the 10 listed tempers.
Is 2419 easy to machine?
Yes — machinability is rated very good (75/100, better than 86% of aluminum grades). Machines well in T8 tempers with short chips; use sharp carbide tooling, high speed, generous coolant, and expect distortion if pre-stretched (T351/T851) plate is machined unevenly.
Can 2419 be welded?
Yes — weldability is rated very good (72/100). One of the few readily fusion-weldable 2000-series alloys — GTAW/GMAW or FSW with 2319 filler; post-weld solution treat and age (T62) or age (T81/T87) to restore strength.
What surface finishes work on 2419?
Protect with chromic/sulfuric anodize plus primer or with alclad/paint systems; bare surfaces pit readily in chloride environments and copper content dulls anodic film color.
Can 2419 be formed, bent or molded?
Form in O or T3x tempers; T8 tempers have limited cold ductility and need generous bend radii or warm forming, with stretch-formed panels aged after shaping.
What is the maximum service temperature of 2419?
2419 is rated for continuous use to about 175°C (347 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 2419-T851 and 2419-O?
T851 is the default condition — the standard damage-tolerant plate temper: best combination of strength, fracture toughness and machining stability. O: softest condition for heavy forming, flattening or machining before solution treatment. Yield strength is 350 MPa in T851 versus 76 MPa in O.
How much does 2419 cost?
2419 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
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- MMPDS — Metallic Materials Properties Development and Standardization — FAA/Battelle (2023)
- AMS 4348 / AMS-QQ-A-250 series aluminium plate specifications — SAE International (2020)
- 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.