Precision Tube Steel Info
| Standard | Surface Finish | D/T Ratio | Yield Strength MPa (min) |
Tensile Strength MPa(min) |
Elong on5.65√So% (min) |
|---|---|---|---|---|---|
| AS1450 | Commercial Quality & Aluminium Coated | <15 | 300 | 310 | 15 |
| 15 to 25 | 275 | 300 | 20 | ||
| <25 to 35 | 250 | 290 | 25 | ||
| <35 | 200 | 280 | 30 | ||
| Zinc Coated | 300 | 350 | 15 |
D = Outside diameter or equivalent round | t = nominal wall thickness | So = Cross Sectional Area
| Characteristic | Round | Rectangular & Square | |
|---|---|---|---|
| Dimension (d, b, d0) | >25mm | ±0.15mm | ±0.5mm |
| >25 and ±50 | ±0.20mm | ||
| >50 and ≤75 | ±0.30mm | ±1% | |
| >75 and ≤100 | ±0.40mm | ||
| Rounds, Rectangular & Square | |||
| Mass | ±10% | ||
| AS1450 | Shape Tolerances |
|---|---|
| Characteristic | All Sections |
| Corner Radius | Max |
| Twist (v) | < 2mm + 0.5mm/m Lengths |
| Squareness | 90 ± 1° |
| Straightness (a) | Shall not exceed Mill Lengths(mm) / 600 |
Commercial Quality ERW Steel Tubing
Standard tubing is manufactured from a range of steel strip types including cold rolled and hot rolled pickled and oiled. The strip has a matt finish, and after being polished in the tube rolling process the resulting surface finish is suitable in most applications. Tubing is coated with a non-tacky rust preventative that is designed to withstand corrosion for at least three months when stored in normal, dry warehouse conditions. The tube can be welded without removal of the rust preventative. Standard tubing is manufactured from a range of steel strip types including cold rolled and hot rolled pickled and oiled. The strip has a matt finish, and after being polished in the tube rolling process the resulting surface finish is suitable in most applications. Tubing is coated with a non-tacky rust preventative that is designed to withstand corrosion for at least three months when stored in normal, dry warehouse conditions. The tube can be welded without removal of the rust preventative.
Rust Protection
Rust preventative oil should be re-applied periodically where prolonged storage is required.
MSGB, HTGB, ACMS, Zinc and Aluminium Coated ERW Steel Tubing
Tubing is manufactured from a range of zinc and aluminium coated steel strip types which are coated on both sides. The welded seam of the tube is re-coated with a zinc and aluminium alloy to replace the material that the welding process has burnt away. Zinc coated tube is coated with a protective agent designed to withstand white rust when stored in normal, dry conditions. Aluminium coated tube is supplied without this protective agent. The performance of zinc coated steel is influenced by micro-environments, which vary from site to site. In corrosive environments it is recommended that a suitable barrier coating (eg. paint or powder coating) be applied over the zinc surface. This application should be in accordance with the supplier’s recommendations with regard to surface pre-treatment, application, curing, and maintenance of the coating - refer to AS/NZS 2312 ‘Guide to the Protection of Iron Steel against Exterior Atmospheric Corrosion’.
MSBR - Mild Steel Bright
Finish – Has a bright finish and is typically used in the manufacture of products that require a higher grade surface finish such as electroplating or similar critical finish applications.
SEMB - Semi Bright
Finish – Typically has a steel grey appearance and suitable surface for general applications. Ideal where demanding and consistent properties are required.
HRSB - Hot Rolled Semi Bright
Finish - Typically has a steel grey appearance and suitable surface for general applications. Ideal for paint or powder coated products.
MSBL - Mild Steel Black
Finish - Has a black, mill finish.
Special Requirements & Non Standard Products
If you have special requirements which are not in our standard range of Commercial Quality, zinc coated or aluminium coated products, Orrcon Steel is happy to assist. Some of the services we offer include different mill lengths, other section sizes, different grades, chemical composition, and mechanical properties, exact cut Lengths, restricted tolerances, other surface finishes and coating thickness as well as perforating. Minimum order quantities (MOQ’s) may apply.