Aluminum 6082-T451
Temper
AA 6082 · UNS A96082 · AISI/SAE H30 · EN AlSi1Mg1, AlSi1MgMn · JIS A6082, A6082P
T451 = t4, stress relieved by stretching
Low-distortion soft-temper plate for parts that will be machined and then artificially aged to T651.
Values for the T451 condition
Other 6082 tempers and conditions
6082 is listed in 12 conditions; see the grade overview at 6082.
Compare all 12 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for deep forming, severe bending or intermediate processing before re-solution treating and ageing. | 65 | 130 | 27 | 35 HB | 49 % IACS |
Slightly strain hardened | Soft supply condition for extrusions/plate that were straightened after annealing; forming stock with marginally higher strength than O. | 85 | 145 | 20 | 40 HB | 49 % IACS |
Solution heat treated and naturally aged by user | 6082 solution treated and naturally aged to a stable condition by the fabricator rather than the mill; mechanicals close to T4 with good formability before final ageing. | 120 | 215 | 17 | 62 HB | 38 % IACS |
T451This page T4, stress relieved by stretching | Low-distortion soft-temper plate for parts that will be machined and then artificially aged to T651. | 135 | 235 | 18 | 63 HB | 38 % IACS |
Solution heat treated and naturally aged | Choose when parts must be bent or formed after heat treatment and then aged to T6 (or left as-is for moderate strength with good ductility). | 140 | 240 | 17 | 65 HB | 38 % IACS |
Cooled from hot working and artificially aged | Press-quenched extrusion temper: cheaper than T6 with slightly lower strength; used for thin structural profiles. | 230 | 270 | 9 | 85 HB | 42 % IACS |
T6 variant, underaged | Deliberately underaged 6082 ageing cycle giving slightly lower strength than T6 but noticeably better ductility, toughness and bendability. | 235 | 290 | 12 | 88 HB | 42 % IACS |
Underaged (T61) plus stress relieved by stretching | Plate temper combining the T61 underaged cycle with controlled stretching, giving low residual stress and stable machining behaviour at near-T6 strength. | 240 | 290 | 11 | 90 HB | 42 % IACS |
Solution heat treated and artificially aged | Default structural temper: maximum strength for extrusions, bar and tube with good corrosion resistance and weldability. | 265 | 310 | 10 | 95 HB | 41 % IACS |
T6, heat treated by the user | Full T6-level properties re-developed by the fabricator after forming or welding of O/F material; strength and hardness essentially match mill T6. | 265 | 310 | 10 | 95 HB | 42 % IACS |
T6, stress relieved by stretching, minor straightening | Stress-relieved extruded bar/profile for precision machined parts that must not warp. | 275 | 315 | 10 | 96 HB | 41 % IACS |
T6, stress relieved by stretching | The standard machining plate temper — low residual stress so thick machined parts stay flat. | 285 | 325 | 10 | 98 HB | 41 % IACS |
What is 6082-T451?
6082-T451 is 6082 in the T451 temper — low-distortion soft-temper plate for parts that will be machined and then artificially aged to T651. 6082-T451 has a yield strength of 135 MPa (19.6 ksi) and a tensile strength of 235 MPa (34.1 ksi) — weaker than 72% of aluminum grades. Elongation at break is 18% and the elastic modulus is 70 GPa (10.2 Msi). 6082-T451 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 555°C (1,031 °F).
Advantages
- Tough — resists crack growth — 36 MPa·√m (32.8 ksi·√in), better than 93% of aluminum grades
- Ductile — tolerates forming and impact — 18%, better than 86% of aluminum grades
- Forms and bends easily — 65/100, better than 80% of aluminum grades
- Good corrosion resistance — 70/100, better than 79% of aluminum grades
Limitations
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
6082-T451 properties
Typical room-temperature values for 6082-T451; 20 are specific to this condition. Other listed values are 6082 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
6082-T451 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 555°C (1,031 °F).
Mechanical13
6082-T451 has a yield strength of 135 MPa (19.6 ksi) and a tensile strength of 235 MPa (34.1 ksi) — weaker than 72% of aluminum grades. Elongation at break is 18% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
6082-T451 is rated for continuous service to 120°C (248 °F). It conducts heat at 155 W/m·K (89.6 BTU/hr·ft·°F), better than 71% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
6082-T451 conducts electricity at 38 % IACS, better than 61% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 79% of aluminum grades.
Sustainability4
Producing a kilogram of 6082-T451 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 30%.
Manufacturability6
6082-T451's machinability is fair (52/100, worse than 63% of aluminum grades); weldability very good (78/100); formability good (65/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 6082-T451
Is 6082 easy to machine?
Machines well in T6/T651 with sharp polished-flute carbide, high speed (300–1000 m/min) and generous coolant/air blast; softer T4/O tempers are gummy and tend to build up on the edge.
Can 6082 be welded?
Readily MIG/TIG welded with 5356 (higher strength/anodizing match) or 4043 (less cracking); expect HAZ strength to fall to roughly T4 level unless post-weld solution treated and re-aged.
Can 6082 be formed, bent or molded?
Form, bend and roll in O or T4 (T4 bend radius ≈ 1–2 t); T6 tolerates only mild bending at ≥3–4 t radius and springs back strongly — extrudability is lower than 6063 so thin, complex profiles are harder.
What surface finishes work on 6082?
Excellent for sulfuric and hard anodizing (wear layers to ~60 µm); clear decorative anodize looks greyish due to Mn/Si constituents, so use etch+colour anodize, powder coat or chromate/Ti conversion coating for cosmetic parts.
6082 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 | 0.7 – 1.3 | 1 |
| Feimpurity | ≤ 0.5 | 0.25 |
| Cu | ≤ 0.1 | 0.05 |
| Mngrain-structure control, key difference vs 6061 | 0.4 – 1 | 0.65 |
| Mg | 0.6 – 1.2 | 0.9 |
| Cr | ≤ 0.25 | 0.05 |
| Zn | ≤ 0.2 | 0.05 |
| Ti | ≤ 0.1 | 0.02 |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
6082-T451 — frequently asked
What is 6082-T451 used for?
6082-T451 is typically used for trusses, bridges and frames. In short: high strength; tough structural standard.
What is the yield strength of 6082-T451?
6082-T451 has a typical yield strength of 135 MPa (19.6 ksi) and a tensile strength of 235 MPa (34.1 ksi) — weaker than 72% of aluminum grades. Strength varies by condition: see the 12 listed tempers.
Is 6082-T451 easy to machine?
Reasonably — machinability is rated fair (52/100, worse than 63% of aluminum grades). Machines well in T6/T651 with sharp polished-flute carbide, high speed (300–1000 m/min) and generous coolant/air blast; softer T4/O tempers are gummy and tend to build up on the edge.
Can 6082-T451 be welded?
Yes — weldability is rated very good (78/100). Readily MIG/TIG welded with 5356 (higher strength/anodizing match) or 4043 (less cracking); expect HAZ strength to fall to roughly T4 level unless post-weld solution treated and re-aged.
What surface finishes work on 6082-T451?
Excellent for sulfuric and hard anodizing (wear layers to ~60 µm); clear decorative anodize looks greyish due to Mn/Si constituents, so use etch+colour anodize, powder coat or chromate/Ti conversion coating for cosmetic parts.
Can 6082-T451 be formed, bent or molded?
Form, bend and roll in O or T4 (T4 bend radius ≈ 1–2 t); T6 tolerates only mild bending at ≥3–4 t radius and springs back strongly — extrudability is lower than 6063 so thin, complex profiles are harder.
What is the maximum service temperature of 6082-T451?
6082-T451 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.
Can FabDigit make parts in 6082-T451?
Yes — 6082-T451 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
- EN 573-3 Aluminium and aluminium alloys — chemical composition of wrought products — CEN (2019)
- EN 755-2 Aluminium extruded rod/bar, tube and profiles — mechanical properties — CEN (2016)
- EN 485-2 Aluminium sheet, strip and plate — mechanical properties — CEN (2018)
- International Alloy Designations and Chemical Composition Limits (Teal Sheets) — The Aluminum Association (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- 6082 extrusion and plate alloy datasheets — Aalco / Constellium / Hydro (2022)
- SMM / Mysteel — SMM (2026)
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.