Aluminum 2A80
GB 2A80
2A80 (LD8) is a high-temperature Al-Cu-Mg-Fe-Ni forging alloy of the GB 2000-series family, available in O, F, T6, T61 and T652 and in the performance class of 2618A.
Reference datasheet — 2A80 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
2A80 tempers and conditions
2A80 is supplied in 5 conditions, soft to hard. T6 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick the annealed intermediate state for forging and machining when maximum plasticity (18% elongation, 60 HB) is needed for secondary forming before solution treatment and ageing. | 90 | 180 | 18 | 60 HB | 46 % IACS |
As fabricated | Use as-forged or hot-extruded stock only as a blank for subsequent heat treatment and machining; at 155 MPa yield and 12% elongation it is not intended for load-bearing service. | 155 | 275 | 12 | 80 HB | 44 % IACS |
T6 variant, underaged | Choose the solution treated and under-aged temper when complex high-temperature forgings need extra ductility and toughness (11% elongation) at a strength trade-off down to 340 MPa yield. | 340 | 420 | 11 | 115 HB | 41 % IACS |
T6, stress relieved by compression | Pick for large open-die or closed-die forgings: compression stress relief between solution treatment and artificial ageing cuts machining distortion and residual-stress cracking, with 7% elongation. | 370 | 430 | 7 | 122 HB | 40 % IACS |
T6Default Solution heat treated and artificially aged | Specify solution heat treated and artificially aged material for pistons, impellers and hot-running forgings needing the best strength/heat resistance mix (380 MPa yield, 200 °C); elongation drops to 8%. | 380 | 440 | 8 | 125 HB | 40 % IACS |
What is 2A80?
2A80 (LD8) is a high-temperature Al-Cu-Mg-Fe-Ni forging alloy of the GB 2000-series family, available in O, F, T6, T61 and T652 and in the performance class of 2618A. It is used for pistons and compressor parts that must hold load near 200 °C, with default T6 properties of 440 MPa tensile, 380 MPa yield, 8% elongation, 125 HB and 150 W/m·K. Weldability (22), formability (20) and corrosion resistance (33) are all low, and the Fe/Ni/Si hard phases abrade tooling, so it is a forge-and-machine alloy rather than a fabrication alloy. 2A70 is the closest alternative when more ductility is needed. 2A80 has a density of 2.8 g/cm³ (0.101 lb/in³), heavier than 81% of aluminum grades. It melts at 510°C (950 °F). 2A80 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 440 MPa (63.8 ksi) — stronger than 86% of aluminum grades. Elongation at break is 8% and the elastic modulus is 74 GPa (10.7 Msi).
What is 2A80 used for?
- Forged engine pistons
- Compressor rotors and impellers
- Compressor housings
- High-temperature engine forgings
- Turbocharger-adjacent brackets
- Machined hot-section fittings
Advantages
- High service temperature — 200°C (392 °F), better than 90% of aluminum grades
- High strength — 380 MPa (55.1 ksi), better than 86% of aluminum grades
Limitations
- Needs corrosion protection — 33/100, worse than 91% of aluminum grades
- Difficult to weld — 22/100, worse than 83% of aluminum grades
2A80 properties
Typical room-temperature values for 2A80-T6; bars are the position among aluminum grades.
Physical3
2A80 has a density of 2.8 g/cm³ (0.101 lb/in³), heavier than 81% of aluminum grades. It melts at 510°C (950 °F).
Mechanical12
2A80 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 440 MPa (63.8 ksi) — stronger than 86% of aluminum grades. Elongation at break is 8% and the elastic modulus is 74 GPa (10.7 Msi).
Thermal6
2A80 is rated for continuous service to 200°C (392 °F). It conducts heat at 150 W/m·K (86.7 BTU/hr·ft·°F), better than 58% of aluminum grades. Thermal expansion is 22.3 µm/m·K (12.4 µin/in·°F).
Electrical3
2A80 conducts electricity at 40 % IACS, better than 72% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is poor (33/100), worse than 91% of aluminum grades.
Sustainability4
Producing a kilogram of 2A80 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 12%.
Manufacturability6
2A80's machinability is good (68/100, better than 67% of aluminum grades); weldability poor (22/100); formability poor (20/100).
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. 2A80 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 2A80
Is 2A80 easy to machine?
Machinability in T6 is good, but the Fe/Ni/Si hard phases abrade tooling; use diamond or fine-grain carbide inserts, high spindle speeds, large rake angles and ample coolant.
Can 2A80 be welded?
Fusion weldability is poor, with hot cracking and a large drop in joint strength. Use bolted or riveted joints, friction welding or diffusion bonding, and re-solution treat and age after any welding.
Can 2A80 be formed, bent or molded?
Hot forging and die forging at about 420–470 °C work well. T6 is essentially not cold formable, so complete any bending in the O temper and heat treat afterwards.
2A80 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 |
|---|---|---|
| Sideliberate addition, improves forgeability and hot strength | 0.5 – 1.2 | 0.8 |
| Feforms heat-resistant Al9FeNi phase with Ni | 1 – 1.6 | 1.3 |
| Cu | 1.9 – 2.5 | 2.2 |
| Mnimpurity limit | ≤ 0.2 | |
| Mg | 1.4 – 1.8 | 1.6 |
| Ni | 0.9 – 1.5 | 1.2 |
| Znimpurity limit | ≤ 0.3 | |
| Tigrain refiner | ≤ 0.15 | |
| Other (each)individual other impurity | ≤ 0.05 | |
| Other (total)sum of other impurities | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 2A80?
Hard anodizing raises wear resistance on piston ring grooves and skirts. Decorative anodizing comes out dark; for outdoor or humid service use chromate conversion coating plus paint, or alclad 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 2A80 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- LD8
How much does 2A80 cost?
2A80 is a premium-cost aluminum ($$$), cheaper than about 51% 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.
2A80 — frequently asked
What is 2A80 used for?
2A80 is typically used for forged engine pistons, compressor rotors and impellers, compressor housings, high-temperature engine forgings, turbocharger-adjacent brackets and machined hot-section fittings. In short: 2618A performance class; load-bearing to 200 °C; forge-and-machine only.
What is the yield strength of 2A80?
2A80 has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 440 MPa (63.8 ksi) — stronger than 86% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is 2A80 easy to machine?
Reasonably — machinability is rated good (68/100, better than 67% of aluminum grades). Machinability in T6 is good, but the Fe/Ni/Si hard phases abrade tooling; use diamond or fine-grain carbide inserts, high spindle speeds, large rake angles and ample coolant.
Can 2A80 be welded?
Not readily — weldability is rated poor (22/100). Fusion weldability is poor, with hot cracking and a large drop in joint strength. Use bolted or riveted joints, friction welding or diffusion bonding, and re-solution treat and age after any welding.
What surface finishes work on 2A80?
Hard anodizing raises wear resistance on piston ring grooves and skirts. Decorative anodizing comes out dark; for outdoor or humid service use chromate conversion coating plus paint, or alclad protection.
Can 2A80 be formed, bent or molded?
Hot forging and die forging at about 420–470 °C work well. T6 is essentially not cold formable, so complete any bending in the O temper and heat treat afterwards.
What is the maximum service temperature of 2A80?
2A80 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 2A80-T6 and 2A80-O?
T6 is the default condition — specify solution heat treated and artificially aged material for pistons, impellers and hot-running forgings needing the best strength/heat resistance mix (380 MPa yield, 200 °C); elongation drops to 8%. O: pick the annealed intermediate state for forging and machining when maximum plasticity (18% elongation, 60 HB) is needed for secondary forming before solution treatment and ageing. Yield strength is 380 MPa in T6 versus 90 MPa in O.
How much does 2A80 cost?
2A80 is a premium-cost aluminum ($$$), cheaper than about 51% 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 of Aluminum Alloys (2618 analog) — ASM International (1990)
- MMPDS typical properties, 2618-T61 — Battelle/FAA (2021)
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.