Magnesium Alloy AZ80A-T6
Temper
ASTM AZ80A · UNS M11800 · EN 3.5812
T6 = solution heat treated and artificially aged
Less common forging temper giving a more uniform aged structure than T5 across thick sections; slightly lower ductility.
Values for the T6 condition
Other AZ80A tempers and conditions
AZ80A is listed in 4 conditions; see the grade overview at AZ80A.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FDefault As fabricated | Default stock condition for AZ80A bar, profile and forgings when maximum ductility and lowest cost are wanted. | 250 | 340 | 11 | 60 HB | 11.5 % IACS |
extruded bar, rod, tube and shapes (ASTM B107) | Pick for long constant-section parts; strength is directional and slightly higher than forgings in the extrusion direction. | 250 | 340 | 11 | 60 HB | 11.5 % IACS |
T6This page Solution heat treated and artificially aged | Less common forging temper giving a more uniform aged structure than T5 across thick sections; slightly lower ductility. | 250 | 345 | 5 | 70 HB | 11.5 % IACS |
Cooled from hot working and artificially aged | Standard strengthened temper for AZ80A extrusions and forgings; highest yield strength at the cost of ductility and some SCC sensitivity. | 275 | 380 | 7 | 72 HB | — |
What is AZ80A-T6?
AZ80A-T6 is AZ80A in the T6 temper — less common forging temper giving a more uniform aged structure than T5 across thick sections; slightly lower ductility. AZ80A-T6 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 345 MPa (50 ksi) — stronger than 97% of magnesium alloy grades. Elongation at break is 5% and the elastic modulus is 45 GPa (6.53 Msi). AZ80A-T6 has a density of 1.8 g/cm³ (0.065 lb/in³), lighter than 63% of magnesium alloy grades. It melts at 490°C (914 °F). F is the default condition FabDigit quotes; T6 is available on request or by drawing note.
Advantages
- High strength — 250 MPa (36.3 ksi), better than 97% of magnesium alloy grades
Limitations
- Low electrical conductivity — 11.5 % IACS, worse than 92% of magnesium alloy grades
- Limited service temperature — 120°C (248 °F), worse than 78% of magnesium alloy grades
- Difficult to weld — 40/100, worse than 75% of magnesium alloy grades
AZ80A-T6 properties
Typical room-temperature values for AZ80A-T6; 20 are specific to this condition. Other listed values are AZ80A reference data and may not represent this condition. Bars are the position among magnesium alloy grades.
Physical3
AZ80A-T6 has a density of 1.8 g/cm³ (0.065 lb/in³), lighter than 63% of magnesium alloy grades. It melts at 490°C (914 °F).
Mechanical14
AZ80A-T6 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 345 MPa (50 ksi) — stronger than 97% of magnesium alloy grades. Elongation at break is 5% and the elastic modulus is 45 GPa (6.53 Msi).
Thermal6
AZ80A-T6 is rated for continuous service to 120°C (248 °F). It conducts heat at 78 W/m·K (45.1 BTU/hr·ft·°F), worse than 58% of magnesium alloy grades. Thermal expansion is 26 µm/m·K (14.4 µin/in·°F).
Electrical3
AZ80A-T6 conducts electricity at 11.5 % IACS, worse than 92% of magnesium alloy grades.
Chemical & Environmental3
Corrosion resistance is poor (20/100), worse than 77% of magnesium alloy grades.
Sustainability4
Producing a kilogram of AZ80A-T6 takes about 330 MJ of energy and emits 27 kg of CO₂ — less than 56% of magnesium alloy grades. Typical recycled content is 20%.
Manufacturability7
AZ80A-T6's machinability is excellent (98/100, better than 96% of magnesium alloy grades); weldability fair (40/100); formability not recommended (12/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with AZ80A-T6
Is AZ80A easy to machine?
Outstanding machinability at high speed with sharp positive-rake tooling and light dry or mineral-oil cutting — never water-based coolant; collect fines wet-free and keep class-D extinguisher on hand for fire risk.
Can AZ80A be welded?
GTAW/GMAW with AZ61A or AZ92A filler is feasible but the 8.5 % Al content makes AZ80A prone to stress-corrosion cracking, so post-weld stress relief (~260 °C, 15 min for T5, or 315 °C for F) is required; preheat thick sections and avoid rigid restraint.
Can AZ80A be formed, bent or molded?
Cold forming is very limited (HCP slip); bend, forge and roll hot at 290–400 °C with generous radii, then re-age to T5; extrusion speeds are low compared with AZ31B.
What surface finishes work on AZ80A?
Clean, then apply a magnesium conversion coating (chrome-free or chromate per ASTM D1732) or Dow 17/HAE anodic coating plus epoxy primer and topcoat; insulate all steel/aluminium fasteners to prevent galvanic attack.
AZ80A 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 |
|---|---|---|
| Al | 7.8 – 9.2 | 8.5 |
| Zn | 0.2 – 0.8 | 0.5 |
| Mn0.12 % min for corrosion control | 0.12 – 0.5 | 0.2 |
| Si | ≤ 0.1 | — |
| Cu | ≤ 0.05 | — |
| Ni | ≤ 0.01 | — |
| Fe | ≤ 0.01 | — |
| Others (each/total)0.30 % total max | ≤ 0.3 | — |
| Mg | balance | — |
AZ80A-T6 — frequently asked
What is AZ80A-T6 used for?
AZ80A-T6 is typically used for aircraft wheels and frame fittings, helicopter gearbox housings, forged aerospace structural brackets, high-load extruded profiles, missile and defence airframe components and racing suspension uprights. In short: forging magnesium alloy.
What is the yield strength of AZ80A-T6?
AZ80A-T6 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 345 MPa (50 ksi) — stronger than 97% of magnesium alloy grades. Strength varies by condition: see the 4 listed tempers.
Is AZ80A-T6 easy to machine?
Yes — machinability is rated excellent (98/100, better than 96% of magnesium alloy grades). Outstanding machinability at high speed with sharp positive-rake tooling and light dry or mineral-oil cutting — never water-based coolant; collect fines wet-free and keep class-D extinguisher on hand for fire risk.
Can AZ80A-T6 be welded?
With care — weldability is rated fair (40/100). GTAW/GMAW with AZ61A or AZ92A filler is feasible but the 8.5 % Al content makes AZ80A prone to stress-corrosion cracking, so post-weld stress relief (~260 °C, 15 min for T5, or 315 °C for F) is required; preheat thick sections and avoid rigid restraint.
What surface finishes work on AZ80A-T6?
Clean, then apply a magnesium conversion coating (chrome-free or chromate per ASTM D1732) or Dow 17/HAE anodic coating plus epoxy primer and topcoat; insulate all steel/aluminium fasteners to prevent galvanic attack.
Can AZ80A-T6 be formed, bent or molded?
Cold forming is very limited (HCP slip); bend, forge and roll hot at 290–400 °C with generous radii, then re-age to T5; extrusion speeds are low compared with AZ31B.
What is the maximum service temperature of AZ80A-T6?
AZ80A-T6 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.
What is the difference between AZ80A-F and AZ80A-T5?
F is the default condition — default stock condition for AZ80A bar, profile and forgings when maximum ductility and lowest cost are wanted. T5: standard strengthened temper for AZ80A extrusions and forgings; highest yield strength at the cost of ductility and some SCC sensitivity. Yield strength is 250 MPa in F versus 275 MPa in T5.
Can FabDigit make parts in AZ80A-T6?
Yes — AZ80A-T6 is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B107/B107M — Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes and Wire — ASTM International (2021)
- ASTM B91 — Magnesium-Alloy Forgings — ASTM International (2017)
- ASTM B275 — Codification of Certain Nonferrous Metals and Alloys (UNS M11800) — ASTM International (2017)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (Magnesium) — ASM International (1990)
- MMPDS-2023, Chapter 4 — Magnesium Alloys — Battelle/FAA (2023)
- ASM Specialty Handbook: Magnesium and Magnesium Alloys — ASM International (1999)
- GB/T 5153 (AZ80A/M2M series) — SAC (2016)
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.