Aluminum 6262A-O (Annealed)
Temper
AA 6262A · EN AlMg1SiSn
Softest condition, used only as a processing state for heavy cold working or re-drawing before heat treatment.
Values for the O condition
Other 6262A tempers and conditions
6262A is listed in 8 conditions; see the grade overview at 6262A.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
OThis page Annealed | Softest condition, used only as a processing state for heavy cold working or re-drawing before heat treatment. | 60 | 130 | 25 | 32 HB | 47 % IACS |
Solution heat treated and naturally aged | Occasional intermediate condition when parts must be bent, staked or swaged before final artificial aging. | 130 | 240 | 20 | 65 HB | 40 % IACS |
T6Default Solution heat treated and artificially aged | Standard stocked rod/bar condition: best balance of strength, ductility and free-machining behaviour for general screw-machined parts. | 275 | 310 | 12 | 95 HB | 43 % IACS |
T6, stress relieved by stretching | Pick when tight dimensional stability after heavy machining matters; strength as T6 but with low residual stress. | 280 | 310 | 11 | 95 HB | 43 % IACS |
T6, stress relieved by stretching, minor straightening | Extruded/drawn bar supplied straight and low-stress for automatic-lathe feeding of long parts. | 280 | 310 | 11 | 95 HB | 43 % IACS |
Solution heat treated, cold worked and artificially aged | Choose for higher strength and better surface finish/size tolerance than T6 while keeping useful ductility. | 360 | 380 | 10 | 115 HB | 44 % IACS |
T8 with stress-relief stretching and minor straightening | T8 strength with controlled straightness and low residual stress for precision turned components. | 360 | 380 | 10 | 115 HB | 44 % IACS |
Solution heat treated, artificially aged and cold worked | Highest strength and hardness plus the best chip control and surface finish; use for hard, close-tolerance drawn bar on multi-spindle machines. | 380 | 400 | 10 | 120 HB | 44 % IACS |
What is 6262A-O?
6262A-O is 6262A in the O temper — softest condition, used only as a processing state for heavy cold working or re-drawing before heat treatment. 6262A-O has a yield strength of 60 MPa (8.7 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 93% of aluminum grades. Elongation at break is 25% and the elastic modulus is 69.5 GPa (10.1 Msi). 6262A-O has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 582°C (1,080 °F). T6 is the default condition FabDigit quotes; O is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 40 MPa·√m (36.4 ksi·√in), better than 98% of aluminum grades
- Ductile — tolerates forming and impact — 25%, better than 94% of aluminum grades
- Forms and bends easily — 85/100, better than 91% of aluminum grades
- High service temperature — 200°C (392 °F), better than 90% of aluminum grades
- High electrical conductivity — 47 % IACS, better than 88% of aluminum grades
Limitations
- Low strength — 60 MPa (8.7 ksi), worse than 93% of aluminum grades
6262A-O properties
Typical room-temperature values for 6262A-O; 21 are specific to this condition. Other listed values are 6262A reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
6262A-O has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 582°C (1,080 °F).
Mechanical12
6262A-O has a yield strength of 60 MPa (8.7 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 93% of aluminum grades. Elongation at break is 25% and the elastic modulus is 69.5 GPa (10.1 Msi).
Thermal6
6262A-O is rated for continuous service to 200°C (392 °F). It conducts heat at 180 W/m·K (104 BTU/hr·ft·°F), better than 86% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
6262A-O conducts electricity at 47 % IACS, better than 88% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), better than 67% of aluminum grades.
Sustainability4
Producing a kilogram of 6262A-O takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 25%.
Manufacturability6
6262A-O's machinability is good (60/100, worse than 51% of aluminum grades); weldability fair (38/100); formability excellent (85/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 6262A-O
Is 6262A easy to machine?
Excellent free-cutting behaviour: the soft Sn phase breaks chips so parts run at high feeds on CNC and multi-spindle lathes with polished-flute carbide tools; T8/T9 give the best finish and closest tolerances.
Can 6262A be welded?
Not recommended for structural welding — the low-melting Sn phase promotes hot cracking and weld porosity; use mechanical joining or, if welding is unavoidable, qualify GTAW with 4043/5356 filler on non-critical joints.
Can 6262A be formed, bent or molded?
Cold formability is limited in T6/T8/T9 (generous bend radii, avoid heavy staking); do severe forming in O or T4 and age afterwards, and keep hot-working temperatures below about 400 °C to avoid Sn-related hot shortness.
What surface finishes work on 6262A?
Clear and hard anodizing respond well and give good wear/corrosion protection; bright decorative anodizing or high-polish work can show faint speckle from Sn particles, and electroless nickel or chromate conversion are good alternatives.
6262A 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 |
|---|---|---|
| Si | 0.4 – 0.8 | 0.6 |
| Fe | ≤ 0.7 | 0.3 |
| Cu | 0.15 – 0.4 | 0.27 |
| Mn | ≤ 0.15 | — |
| Mg | 0.8 – 1.2 | 1 |
| Cr | 0.04 – 0.14 | 0.09 |
| Zn | ≤ 0.25 | — |
| Ti | ≤ 0.15 | — |
| Snfree-machining addition replacing Pb+Bi of 6262 | 0.4 – 0.7 | 0.55 |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
6262A-O — frequently asked
What is 6262A-O used for?
6262A-O is typically used for precision machined fittings, fasteners and roHS-compliant free-machining parts. In short: lead-free free-machining 6000 series; screw-machine bar grade; direct 6262 replacement.
What is the yield strength of 6262A-O?
6262A-O has a typical yield strength of 60 MPa (8.7 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 93% of aluminum grades. Strength varies by condition: see the 8 listed tempers.
Is 6262A-O easy to machine?
Reasonably — machinability is rated good (60/100, worse than 51% of aluminum grades). Excellent free-cutting behaviour: the soft Sn phase breaks chips so parts run at high feeds on CNC and multi-spindle lathes with polished-flute carbide tools; T8/T9 give the best finish and closest tolerances.
Can 6262A-O be welded?
With care — weldability is rated fair (38/100). Not recommended for structural welding — the low-melting Sn phase promotes hot cracking and weld porosity; use mechanical joining or, if welding is unavoidable, qualify GTAW with 4043/5356 filler on non-critical joints.
What surface finishes work on 6262A-O?
Clear and hard anodizing respond well and give good wear/corrosion protection; bright decorative anodizing or high-polish work can show faint speckle from Sn particles, and electroless nickel or chromate conversion are good alternatives.
Can 6262A-O be formed, bent or molded?
Cold formability is limited in T6/T8/T9 (generous bend radii, avoid heavy staking); do severe forming in O or T4 and age afterwards, and keep hot-working temperatures below about 400 °C to avoid Sn-related hot shortness.
What is the maximum service temperature of 6262A-O?
6262A-O 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 6262A-T6 and 6262A-O?
T6 is the default condition — standard stocked rod/bar condition: best balance of strength, ductility and free-machining behaviour for general screw-machined parts. O: softest condition, used only as a processing state for heavy cold working or re-drawing before heat treatment. Yield strength is 275 MPa in T6 versus 60 MPa in O.
Sources
- EN 573-3 Aluminium and aluminium alloys — Chemical composition (EN AW-6262A) — CEN (2019)
- EN 755-2 Aluminium extruded rod/bar, tube and profiles — Mechanical properties — CEN (2016)
- ASTM B211 / B221 — Aluminum-alloy bar, rod, wire and extruded shapes — ASTM (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (6262 data) — ASM International (1990)
- International Alloy Designations and Chemical Composition Limits (Teal Sheets) — The Aluminum Association (2018)
- Free-machining lead-free aluminium bar datasheets (Sn-modified 6000 series) — European extruders/drawers (2023)
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.