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Aluminium Supplier
Aluminium Round, Flat and Square Bar
Aluminium bar is usually specified by grade first and profile second. The grade sets strength, weldability and how the part finishes. The profile sets how much material has to be machined away to reach the finished part.
This page covers the three grades held in New Zealand and Australia: 6061, 6082 and 7075-T6. It sets out the profiles and size ranges for each, how the grades differ in use, and how orders are supplied in each country.
Explore Aluminium Grades
| Aluminium 6061-T6 🔗 | Medium to high strength, heat-treatable, with good weldability and very good resistance to atmospheric corrosion. Round, flat and square bar. |
| Aluminium 6082-T6 🔗 | Aluminium–magnesium–silicon grade, formed by extrusion and rolling, with strong anodising properties. Flat and square bar. |
| Aluminium 7075-T6 🔗 | Zinc-alloyed grade for highly stressed structural parts, with good fatigue resistance. Round bar, including DFARS round bar for defence programmes. |
Profiles and Size Ranges
Stocked ranges by grade and profile. Sizes outside these ranges, and custom profiles in all three grades, are supplied on indent. Full size lists and weights per metre are on each grade page.
| Grade | Profile | Size range | New Zealand | Australia | Method |
|---|---|---|---|---|---|
| 6061 | Solid round bar | 12.7–410 mm OD (½–16 in) | Stocked | Stocked | Extruded |
| 6061 | Flat bar | 6–152 mm thick (¼–6 in) × 50–425 mm wide (2–16.7 in) | Stocked | Stocked | Extruded |
| 6061 | Square bar | 19.05–203 mm (¾–8 in) | Stocked | Stocked | Extruded |
| 6082 | Flat bar | Listed sizes 38.1 × 76.2 to 76.2 × 101.6 mm (1½ × 3 to 3 × 4 in) | Stocked | Stocked | Extruded |
| 6082 | Square bar | Listed sizes 63.5–152.4 mm (2½–6 in) | Stocked | Stocked | Extruded |
| 7075-T6 | Solid round bar | 20–200 mm OD (0.8–7.9 in) | Stocked | Stocked | Extruded |
| 7075-T6 | Solid round bar, DFARS | 20–220 mm OD (0.8–8.7 in) | Indent | Stocked | Extruded |
| All three | Custom profiles | To order | Indent | Indent | Extruded |
Choosing Between 6061, 6082 and 7075-T6
6061
The general-purpose grade. Magnesium and silicon make it heat-treatable to medium-high strength, and it keeps good weldability, although strength drops in the weld zone. It machines and anodises well, which is why it appears in hydraulic manifolds, couplings and valves, marine parts and food-processing equipment.
6082
From the same aluminium–magnesium–silicon family, typically extruded or rolled and not used for castings. It cannot be work hardened, so strength comes from heat treatment. Held as flat and square bar for transport equipment, marine applications and high-stress components.
7075-T6
Zinc is the main alloying element, with magnesium and copper, and in the T6 condition it is the strongest of the three. It is generally not fusion welded, so it suits machined, bolted or riveted parts such as aircraft structural parts, load-bearing components and motorsport parts.
Supplying New Zealand and Australia
Stock is held in both countries. Australian orders are supplied from Australia and New Zealand orders from New Zealand. The exception is 7075-T6 DFARS round bar, which is held in Australia and supplied into New Zealand on indent.
Every order ships with batch certification. DFARS 7075-T6 round bar is supplied with a mill certificate stating country of melt and country of manufacture, plus a Certificate of Conformance, for customers supplying into defence programmes.
New Zealand
20 Kaimanawa Street, Palmerston North 4414
+64 6 355 1600
Australia
Unit 2, 16–18 Sterling Road, Minchinbury NSW 2770
+61 2 9061 8931
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Unique Range
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Global Mill Network
6061, 6082 and 7075-T6 bar is sourced from mills worldwide and held in stock in New Zealand and Australia.
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Further Reading
Blog
Aluminium 6061 vs 7075: A Comprehensive Comparison
Blog
A Guide to the Grades of Aluminium: Choosing the Right Alloy
Request a Quote
Kormax holds 6061, 6082 and 7075-T6 bar in New Zealand and Australia. Send the grade, profile, size and quantity to check availability and request a quote.