Magnesium Alloy AZ80A · temper
Magnesium Alloy AZ80A-T5
Properties of the T5 condition, compared with the other AZ80A tempers.
Standard strengthened temper for AZ80A extrusions and forgings; highest yield strength at the cost of ductility and some SCC sensitivity.
What is AZ80A-T5?
AZ80A-T5 is AZ80A in the T5 temper — standard strengthened temper for AZ80A extrusions and forgings; highest yield strength at the cost of ductility and some SCC sensitivity. AZ80A-T5 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 380 MPa (55.1 ksi) — stronger than 100% of magnesium alloy grades. Elongation at break is 7% and the elastic modulus is 45 GPa (6.53 Msi). AZ80A-T5 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; T5 is available on request or by drawing note.
Advantages
- High strength — 275 MPa (39.9 ksi), better than 100% of magnesium alloy grades
Limitations
- Low electrical conductivity — 11.5 % IACS, worse than 93% of magnesium alloy grades
AZ80A-T5 properties
Typical room-temperature values for AZ80A-T5 — 11 properties are specific to this condition; the rest are grade-level values shared by every AZ80A temper. Each bar shows where the value sits among the magnesium alloy grades in FabDigit's library — further right is higher.
Physical3
AZ80A-T5 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).
Mechanical13
AZ80A-T5 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 380 MPa (55.1 ksi) — stronger than 100% of magnesium alloy grades. Elongation at break is 7% and the elastic modulus is 45 GPa (6.53 Msi).
Thermal6
AZ80A-T5 is rated for continuous service to 130°C (266 °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-T5 conducts electricity at 11.5 % IACS, worse than 93% 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-T5 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-T5's machinability is excellent (98/100, better than 96% of magnesium alloy grades); weldability fair (45/100); formability not recommended (12/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other AZ80A tempers and conditions
AZ80A is also supplied in 3 other conditions. The full side-by-side table is on the AZ80A overview.
- FDefaultDefault stock condition for AZ80A bar, profile and forgings when maximum ductility and lowest cost are wanted.250 MPa yield · 60 HB
- T5Standard strengthened temper for AZ80A extrusions and forgings; highest yield strength at the cost of ductility and some SCC sensitivity.275 MPa yield · 72 HB
- As ExtrudedPick for long constant-section parts; strength is directional and slightly higher than forgings in the extrusion direction.250 MPa yield · 60 HB
Working with AZ80A-T5
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-T5 — frequently asked
What is AZ80A-T5 used for?
AZ80A-T5 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-T5?
AZ80A-T5 has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 380 MPa (55.1 ksi) — stronger than 100% of magnesium alloy grades. Strength varies by condition: see the 4 listed tempers.
Is AZ80A-T5 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-T5 be welded?
With care — weldability is rated fair (45/100). 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-T5?
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-T5 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-T5?
AZ80A-T5 is rated for continuous use to about 130°C (266 °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-T5?
Yes — AZ80A-T5 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.