Mill Finish
Natural aluminium finish off the Extrusion Press
Natural Anodised Finish
Aluminium is a corrision resistant metal due to a film of aluminium oxide which occurs naturally on its surface.
Anodising is an applied finish by and electro-chemical process that thickens the natural oxide film on the Aluminium and imparts to the metal surfaces the extreme hardness, corrosion and wear resistance of the oxide.
PMB's naterual anodised finish conforms to BS EN12373-1 and is available in nominal film thickness of 10, 15, 20 and 25 microns
Recommended film thickness is 10 microns and 25 microns for normals and corrosive atmospheric conditions respectively.
Colour Anodised Finish
PMB Aluminium extrusions can be treated in durable inorganic colours to yield a finish which is permanent, lightfast, abrasion and corrosion resistant and unchanging in colour intensity. The finish available in bronze and black anodise.
In the colour process, inorganic metal particles are deposited electrolytically in the pores of a clear anodic film. Electrolytic deposition results in the colour particles being fixed at the very base of the pores, allowing virtually the full thickness of the anodic film to protect them.
The extrusion is sealed in boiling deionised water which closes off the pores in the anodic film and permanently seals in the colour particles.
PMB's aluminium is available in 4 colours - Light, Medium and Dark Bronze and Black anodise in nominal film thickness of 10, 15, 20 an 25 microns.
Recommended film thickness is 15 microns and 25 microns for normals and corrosive atmospheric conditions respectively.
| F | As fabricated i.e there is no special control over the temper of such material and it is normally in the as-extruded condition. No mechanical property limits are specified. |
| T1 | Cooled from an elevated temperature shaping process and naturally aged to a substantially stable condition. |
| T4 | Solution heat-treated and naturally aged to a substantially stable condition. No artificial ageing required. |
| T5 | Air cooled from the extrusion temperature and artificially aged to improve mechanical properties. |
| T6 | Solution heat-treated and the artificially aged. |
Equivalent to BS H9
Alloy 6063 provides a good combination of extrudability and mechanical properties. Its excellent extrudability allowas thin-walled hollow shapes, intricate solids, and other shapes that are usually difficult to extrude with satisfactory finish, to be produced more easily.
It responds well to polishing, chemical brightening, anodising, and dyeing.
Welding
Alloy 6063 is readily welded by the MIG and TIG processes. The recommended filler alloy, particularly when welding exposed surfaces that will be anodised for decorative purposes is 5356. Alloy 4043 may be used in other cases.
Riverts
Alloy 6053 - T61
Machining
Readily machined in all tempers given.
Forming
All tempers may be formed, the softer tempers accepting more severe forming.
Corrosion
Excellent resistance to the atmosphere. Particularly suitable for anodising for architectural applications.
Extruded Shaped - T1, T5, T6
Alloy 6063 is a heat-treatable aluminium-magnesium-silicon alloy.
| % Weight | % Weight | |||
| Copper | 0.10 | Zinc | 0.10 | |
| Iron | 0.35 | Chromium | 0.10 | |
| Magnesium | 0.45 - 0.95 | Others, each | 0.05 | |
| Manganese | 0.10 | Others, total | 0.15 | |
| Silicon | 0.20 - 0.60 | |||
| Titanium | 0.10 | Aluminium | Remainder |
| Temper | Thickness (mm) | Ultimate Strength | 0.2% Stress | (Mpa) | Elongation (%) | Hardness (Vickers) |
| Min. | Min. | Max | Min. | Typical | ||
| T1 | Up to 12.5 | 115 | 60 | - | 12 | |
| 12.50 - 5.00 | 110 | 55 | - | 12 | 40 | |
| T5 | Up to 12.5 | 150 | 110 | - | 8 | |
| 12.50 - 25.00 | 145 | 105 | - | 8 | 60 | |
| T6 | Up to 12.5 | 205 | 170 | - | 8 | |
| 12.50 - 25.00 | 205 | 170 | - | 10 | 80 |
| Density | 2.71 g/cm3 |
| Melting Range | 6.15 - 655°C |
| Specific Heat between 0 - 100°C | 879 J/kg.K |
| Coefficient of Linear Expression between 20 - 100°C | 23 x 10^-6/ K |
| Thermal Conductivity at 25°C | 202 W/m.K |
| Electrical Resistivity at 20°C | 0.033 μ Ωm |
| Modulus of Elasticity | 69 x 10^3 MPA |
1. These are the most common tempers, other may be available. For further information contact a PMB Sales Office
2. Composition given in percent maximum unless shown as a range.
3. The physical properties given are typical values.
4. Only for structural mill finish application and simple/small ccd(max 120mm) sections - with equal wall thickness.
Comwall
Comsash
Comwall S
Comwall M
Comwall M1
Comwall U1
Comwall U3