Aluminum A206.0-T6
Temper
AA A206.0 · UNS A12060
T6 = solution heat treated and artificially aged
Occasionally specified where peak yield strength matters more than toughness and SCC risk is controlled.
Values for the T6 condition
Other A206.0 tempers and conditions
A206.0 is listed in 5 conditions; see the grade overview at A206.0.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Raw casting condition, used only as an intermediate before solution treatment; strength and ductility are low. | 110 | 195 | 6 | 55 HB | 38 % IACS |
T4Default Solution heat treated and naturally aged | Pick for maximum ductility and fracture toughness with high strength — the standard condition for structural aerospace and armament castings. | 264 | 430 | 17 | 95 HB | 33 % IACS |
Solution heat treated and overaged (stabilized) | Pick for the highest yield strength combined with dimensional stability and improved resistance to stress-corrosion cracking. | 345 | 435 | 11.7 | 115 HB | 39 % IACS |
Solution heat treated and fully overaged for maximum stability | Pick when long-term dimensional stability, elevated-temperature service and best SCC resistance outweigh a modest strength loss versus T7. | 345 | 415 | 12 | 110 HB | 40 % IACS |
T6This page Solution heat treated and artificially aged | Occasionally specified where peak yield strength matters more than toughness and SCC risk is controlled. | 350 | 440 | 7 | 120 HB | 36 % IACS |
What is A206.0-T6?
A206.0-T6 is A206.0 in the T6 temper — occasionally specified where peak yield strength matters more than toughness and SCC risk is controlled. A206.0-T6 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 440 MPa (63.8 ksi) — stronger than 83% of aluminum grades. Elongation at break is 7% and the elastic modulus is 71 GPa (10.3 Msi). A206.0-T6 has a density of 2.8 g/cm³ (0.101 lb/in³), heavier than 81% of aluminum grades. It melts at 570°C (1,058 °F). T4 is the default condition FabDigit quotes; T6 is available on request or by drawing note.
Advantages
- Easy to machine — 80/100, better than 92% 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 — 30/100, worse than 98% of aluminum grades
- Limited formability — 10/100, worse than 80% of aluminum grades
A206.0-T6 properties
Typical room-temperature values for A206.0-T6; 11 are specific to this condition. Other listed values are A206.0 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
A206.0-T6 has a density of 2.8 g/cm³ (0.101 lb/in³), heavier than 81% of aluminum grades. It melts at 570°C (1,058 °F).
Mechanical13
A206.0-T6 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 440 MPa (63.8 ksi) — stronger than 83% of aluminum grades. Elongation at break is 7% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
A206.0-T6 is rated for continuous service to 175°C (347 °F). It conducts heat at 130 W/m·K (75.1 BTU/hr·ft·°F), worse than 65% of aluminum grades. Thermal expansion is 22.5 µm/m·K (12.5 µin/in·°F).
Electrical3
A206.0-T6 conducts electricity at 36 % IACS, better than 55% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is poor (30/100), worse than 98% of aluminum grades.
Sustainability4
Producing a kilogram of A206.0-T6 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 15%.
Manufacturability8
A206.0-T6's machinability is very good (80/100, better than 92% of aluminum grades); weldability poor (30/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with A206.0-T6
Is A206.0 easy to machine?
Machines very well in T4/T7 with sharp carbide or PCD tools, high speeds and flood coolant; chips are continuous so use polished flutes and chip-breaking geometry.
Can A206.0 be welded?
Crack-sensitive Al-Cu chemistry — GTAW repair only with matching 206-type or 2319 filler, tight preheat/interpass control, and re-solution + re-age afterwards; not recommended for structural joints.
Can A206.0 be formed, bent or molded?
Sand and permanent-mold casting only; needs chills, generous risers, tight thermal-gradient control and low-turbulence gating to avoid hot tearing and shrink porosity; solution treatment near 525–530 °C requires close furnace control to avoid incipient melting.
What surface finishes work on A206.0?
Anodizing gives dull, less protective films because of the high copper — specify chromate conversion plus epoxy primer/paint, or nickel/cadmium plating, for corrosion protection; shot peening improves fatigue and SCC resistance.
A206.0 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 |
|---|---|---|
| SiA206.0 tightened vs 206.0 (0.10) | ≤ 0.05 | 0.03 |
| Felow Fe essential for toughness | ≤ 0.1 | 0.06 |
| Cu | 4.2 – 5 | 4.6 |
| Mn | 0.2 – 0.5 | 0.35 |
| Mg | 0.15 – 0.35 | 0.25 |
| Ni | ≤ 0.05 | — |
| Zn | ≤ 0.1 | — |
| Tigrain refinement | 0.15 – 0.3 | 0.22 |
| Sn | ≤ 0.05 | — |
| Others (each)total 0.15 max | ≤ 0.05 | — |
| Al | balance | — |
A206.0-T6 — frequently asked
What is A206.0-T6 used for?
A206.0-T6 is typically used for aerospace structural parts, automotive suspension components, high-strength machinery parts and military castings. In short: high-toughness Al-Cu casting; ductile structural cast alloy; poor corrosion resistance.
What is the yield strength of A206.0-T6?
A206.0-T6 has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 440 MPa (63.8 ksi) — stronger than 83% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is A206.0-T6 easy to machine?
Yes — machinability is rated very good (80/100, better than 92% of aluminum grades). Machines very well in T4/T7 with sharp carbide or PCD tools, high speeds and flood coolant; chips are continuous so use polished flutes and chip-breaking geometry.
Can A206.0-T6 be welded?
Not readily — weldability is rated poor (30/100). Crack-sensitive Al-Cu chemistry — GTAW repair only with matching 206-type or 2319 filler, tight preheat/interpass control, and re-solution + re-age afterwards; not recommended for structural joints.
What surface finishes work on A206.0-T6?
Anodizing gives dull, less protective films because of the high copper — specify chromate conversion plus epoxy primer/paint, or nickel/cadmium plating, for corrosion protection; shot peening improves fatigue and SCC resistance.
Can A206.0-T6 be formed, bent or molded?
Sand and permanent-mold casting only; needs chills, generous risers, tight thermal-gradient control and low-turbulence gating to avoid hot tearing and shrink porosity; solution treatment near 525–530 °C requires close furnace control to avoid incipient melting.
What is the maximum service temperature of A206.0-T6?
A206.0-T6 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 A206.0-T4 and A206.0-F?
T4 is the default condition — pick for maximum ductility and fracture toughness with high strength — the standard condition for structural aerospace and armament castings. F: raw casting condition, used only as an intermediate before solution treatment; strength and ductility are low. Yield strength is 264 MPa in T4 versus 110 MPa in F.
Sources
- ASTM B26/B26M — Aluminum-Alloy Sand Castings — ASTM International (2018)
- ASTM B108/B108M — Aluminum-Alloy Permanent Mold Castings — ASTM International (2019)
- Registration Record of Aluminum Association Alloy Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot ('Pink Sheets') — The Aluminum Association (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Specialty Handbook: Aluminum and Aluminum Alloys — ASM International (1993)
- AFS/NADCA foundry alloy property compilations for 206 alloys — American Foundry Society (2019)
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.