A heat-treatable structural alloy used for profiles, rod, bar and tube. Its strength and forming behaviour depend on the supplied temper.
Selected reference facts; incomplete alloy coverage. Keep typical values, source minima and composition limits distinct. Reference records are not certificates or design allowables.
Grade, forms and temper conditions
6000 series · Extruded profiles, Rod and bar, Tube and pipe, Sheet and plate
Reviewed temper examples: O, T1, T4, T6, T651, T6511. These do not establish every possible alloy-form-temper supply combination.
| Property | Value | Unit | Temper / form | Condition | Basis / verification | Source ID |
|---|---|---|---|---|---|---|
| Density | 2700 | kg/m³ | Not specified / Sheet, coil, plate | 20 °C | typical / cross-checked-rounded | kaiser6061 |
| Thermal conductivity | 167 | W/(m·K) | T6 / T651 / Sheet, coil, plate | 20 °C | typical / single-source | kaiser6061 |
| Linear thermal expansion | 23.6 | µm/(m·K) | Not specified / Sheet, coil, plate | 20–100 °C average | typical / single-source | kaiser6061 |
| Temper | Product form | Thickness / specimen condition | Tensile MPa | Yield MPa | Basis | Source ID |
|---|---|---|---|---|---|---|
| T6 / T6511 | Extrusion | ≤6.30 mm | 260 | 240 | source-minimum | hydro6061 |
| T6 / T651 | Sheet, coil, plate | 0.500 inch diameter tensile specimen; material thickness unspecified | 310 | 276 | typical | kaiser6061 |
T6 / T6511 / Extrusion: Supplier reference; thickness of tensile specimen section; not a certificate or design allowable; checked 2026-10-14.
T6 / T651 / Sheet, coil, plate: Supplier reference; thickness of tensile specimen section; not a certificate or design allowable; checked 2026-10-14.
| Element | Minimum wt % | Maximum wt % | Source ID |
|---|---|---|---|
| Si | 0.4 | 0.8 | hydro6061 |
| Fe | — | 0.7 | hydro6061 |
| Cu | 0.15 | 0.4 | hydro6061 |
| Mn | — | 0.15 | hydro6061 |
| Mg | 0.8 | 1.2 | hydro6061 |
| Cr | 0.04 | 0.35 | hydro6061 |
| Zn | — | 0.25 | hydro6061 |
| Ti | — | 0.15 | hydro6061 |
| Other each | — | 0.05 | hydro6061 |
| Other total | — | 0.15 | hydro6061 |
| Al | — | Remainder | hydro6061 |
Fabrication and material selection
Consider softer tempers before severe forming. Welding can lower strength near the joint; use properties appropriate to the welded condition. Compare 6063 when exposed surface appearance drives selection.
Applications and product forms
Machinery, Transportation, General fabrication
Standards and acceptance
Identify the governing product specification by the actual form and manufacturing route. A grade designation alone does not establish compliance or equivalence. Confirm the edition, required condition, inspection and dimensional limits through the supplier and an authorized specification.
Product-specific standard scopes · Compare material conditions · Engineering calculators
Technical questions
Are typical values delivery limits?
No. A typical reference value describes the source condition; it is not a guaranteed minimum for a delivered lot.
Which temper and thickness should I compare?
Compare the same material form, temper, thickness/test condition, unit and value basis. Different conditions cannot be silently treated as interchangeable.
Technical sources and verification
Selected reference facts checked 14 October 2026. Source values apply to their stated material condition and are not certification of supplied stock.
- Hydro • 6061 extrusions — 2019/01 (February 2019)
- Kaiser • 6061 sheet, coil and plate — 05/06
