Corten Steel Tube Grades and Product Types
Weathering steel describes a family of materials rather than one universal tube specification. ASC supplies the following ranges for their specified industrial or fabrication requirements.
| Product range | Product context |
|---|---|
| ASTM A423 Grade 1 / ASME SA423 Grade 1 | Welded round industrial tubes; ASTM/ASME specification and documentation agreed for the order. |
| Corten A square and rectangular tubes | Separate weathering-material sections for specified fabrication; not presented as A423 round tubes. |
| ASTM A847 | Structural weathering tubing with finished hollow-section requirements. |
| S355J0W / S355J2W | Weathering material grades for tube fabrication; finished-tube requirements specified separately. |
| S355J0WP / S355J2WP | Phosphorus-alloyed weathering material grades, distinct from the W-grade family. |
A material grade and a finished-tube specification have different roles; similar names do not establish automatic equivalence.
ASTM A423 Grade 1 and ASME SA423 Grade 1 Tubes
For industrial equipment specified for this material, explore our welded ASTM A423 Grade 1 and ASME SA423 Grade 1 round tubes, available in lengths up to 56 feet. Corten A square and rectangular sections are a separate offering.
In power plants and sugar plants, an economizer recovers heat from exhaust gases to warm incoming water. An air preheater transfers recovered heat to combustion air. Tube selection follows the actual equipment and service specification.
Send the required outside diameter, minimum wall thickness, length and quantity for an A423/SA423 quotation. Available dimensional combinations and the applicable specification, edition and documentation are confirmed for the order; ASTM designation alone does not establish ASME acceptance or dual certification.
Corten A Square and Rectangular Tubes
ASC supplies Corten A square and rectangular tubes for specified fabricated frames, supports and architectural components. Flat faces can simplify the layout of connections and visible frame members, while rectangular profiles provide different width and depth dimensions.
These sections are a separate offer from A423 round industrial tubes. The supplied material, section dimensions and applicable finished-product requirements define the product for the fabrication.
Square and rectangular enquiries use outside side dimensions, wall thickness and length. ASC quotes the required sections against the project dimensions and quantity.
Structural and EN Weathering-Steel Tube Options
ASTM A847 is a finished structural-tubing specification for high-strength, low-alloy steel with improved atmospheric-corrosion resistance. It belongs to structural design and fabrication rather than an industrial pressure-tube specification.
Our EN material ranges include S355J0W, S355J2W, S355J0WP and S355J2WP pipes and tubes. Their material-grade requirements are distinct from the construction, dimensional tolerances and tests specified for the finished tube.
Corten Steel Tube Supplier, Exporter and Stockist
ASC exports internationally and welcomes tube enquiries from buyers in the USA, the UK and Europe. We handle industrial replacement requirements, fabrication schedules and distributor purchases.
We specialize in fast delivery and prioritize urgent orders. The schedule depends on the material, dimensions, quantity, availability and destination. Tubes can be packed in bundles or wooden boxes to suit the product and order.
Mill test certificates and additional inspection can be requested, with the documentation scope agreed for the supplied material and finished product.
Request a Corten Steel Tube Export QuoteGrade-Specific Chemical Composition
Tube chemistry depends on the specified material. The following reference applies to ASTM A423 Grade 1; other weathering tube grades have their own composition requirements.
| Element | Requirement (%) |
|---|---|
| Carbon (C) | ≤ 0.15 |
| Manganese (Mn) | ≤ 0.55 |
| Phosphorus (P) | 0.06–0.16 |
| Sulfur (S) | ≤ 0.060 |
| Silicon (Si) | ≥ 0.10 |
| Copper (Cu) | 0.20–0.60 |
| Chromium (Cr) | 0.24–1.31 |
| Nickel (Ni) | 0.20–0.70 |
Composition limits: ASTM A423/A423M-19 (2019). Supplied material must meet the edition specified for the order.
ASTM A423 Grade 1 Mechanical Reference
These selected values apply to the stated A423 reference, not to every Corten tube or structural section. Structural products such as A847 are covered by their own material and finished-tube requirements.
| Property | Requirement |
|---|---|
| Tensile strength, minimum | 415 MPa |
| Yield strength, minimum | 255 MPa |
| Hardness, maximum | 170 HBW or 87 HRBW |
ASTM A423/A423M-19 (2019), with the required heat treatment. Mechanical-property requirements exclude tubes below 3.2 mm inside diameter or 0.4 mm wall thickness in SI units. Elongation depends on specimen and wall thickness.
These are material-test values, not operating-pressure ratings or elevated-temperature design allowables.
Weathering Performance and Tube Details
For exposed architectural and structural work, protective weathering depends on suitable wetting and drying. Tube ends, joints and enclosed spaces need details that avoid trapped water, while run-off should be directed away from finishes that can stain.
Persistent dampness and significant chloride exposure require assessment. For industrial equipment, corrosion behaviour must instead be assessed against the actual gas, fluid, temperature and operating conditions; outdoor patina behaviour is not a substitute for that assessment.
Also Available: ASTM A500 Carbon Steel Tubes
ASC also supplies ASTM A500 carbon steel structural tubing in round, square and rectangular forms. This is a separate carbon-steel range and does not carry weathering performance simply because it is a hollow section.
Corten Steel Tube and Pipe FAQs
What Corten steel tube forms does ASC supply?
Our range includes welded round ASTM A423 Grade 1 and ASME SA423 Grade 1 tubes and Corten A square and rectangular tubes. Other structural and EN material tube ranges are supplied to their applicable product requirements.
Are Corten A square tubes the same as ASTM A423 tubes?
No. Corten A square and rectangular sections are a separate fabrication offer. ASC’s A423/SA423 offer is welded round industrial tubing.
What is the difference between ASTM A423 and ASTM A847?
A423 covers low-alloy tubes for specified industrial and pressure-containing equipment applications. A847 is a structural weathering-tubing specification. Their applications and technical requirements should not be interchanged.
Which sizes can be quoted for Corten steel tubes?
Round tubes use outside diameter, wall thickness and length; square and rectangular sections use outside side dimensions, wall and length. Our welded round A423/SA423 offering includes lengths up to 56 feet, with the available dimensional combination confirmed for the order.
Do S355 weathering material names certify a finished tube?
The material grade identifies the steel. The finished tube also needs its specified construction, dimensions, tolerances and testing; the grade name alone does not establish a finished-tube certification.
Can weathering tubes be left unpainted?
Suitable structural or architectural applications can use them unpainted when exposure and detailing support protective weathering. Industrial tube service needs a separate equipment-specific corrosion and design assessment.
Is ASTM A500 a weathering-steel tube specification?
No. ASTM A500 covers carbon structural tubing. ASC offers it as a separate structural product range, with corrosion protection selected for the intended exposure.
Can ASC supply export packing and material documents?
Yes. Bundles or wooden boxes, mill test certificates and additional inspection can be requested. Packing and documentation are agreed for the product, and the delivery schedule reflects the order and destination.
Related Fabricated Elbow Enquiries
For a drawing-defined change-of-direction component, see Corten steel fabricated elbows. Specify geometry, weld details, material and service conditions; these are fabricated components, not seamless or forged fittings.