Corten and Weathering Steel Tubes for Industrial Equipment
ASTM A423 Grade 1 tubes are copper-bearing, low-alloy steel tubes used where corrosion resistance is important. Buyers also refer to this material as Corten steel tubes or weathering steel tubes. Copper, chromium and nickel form part of the controlled alloy composition.
For equipment fabrication, the specification brings together chemical composition, minimum tensile and yield strengths, and a maximum hardness. It also defines the tubes on a minimum-wall basis: the wall must meet a stated minimum rather than simply a nominal thickness. For structural hollow-section requirements, see ASTM A847 structural tubing; it is a separate specification, not an interchangeable industrial-tube designation.
ASTM A423 Grade 1 Tube Sizes and Lengths
ASC offers welded round ASTM A423 Grade 1 and ASME SA423 Grade 1 tubes in lengths up to 56 feet. The available outside diameter, minimum wall thickness and length combination is confirmed against your requirement. Include dimensions and units in your enquiry.
ASTM’s usual dimensional scope includes minimum wall thicknesses of 0.9–12.7 mm. This is a standard reference; the available diameter, wall and length combination is confirmed in the export quotation.
ASTM A423 Grade 1 Tubes for Sugar Plants and Power Plants
Sugar plants and power plants use economizers and air preheaters to recover useful heat from boiler exhaust. An economizer transfers this heat to feedwater before it enters the boiler. An air preheater warms the air supplied for combustion.
ASC supplies welded round tubes for these assemblies when the equipment design specifies ASTM A423 Grade 1. Our supply covers new heat-recovery equipment and replacement tubes for plant maintenance, with random or custom lengths to match the requirement.
ASTM A423 Grade 1 Tubes Supplier, Exporter and Stockist
We export internationally and welcome enquiries from buyers in the USA, the UK and Europe, including Germany and the Netherlands. ASC handles project purchases, distributor orders and replacement-tube requirements for ASTM A423 Grade 1 and ASME SA423 Grade 1 tubes.
We specialize in fast delivery and prioritize urgent export requirements. The delivery schedule depends on tube size, quantity, material availability and destination. Tubes can be packed in wooden boxes or bundles to suit the order.
Domestic supply is also available.
Request an Export QuoteASTM A423 Grade 1 and ASME SA423 Grade 1 Specifications
ASTM A423 Grade 1 and ASME SA423 Grade 1 are related material designations used for industrial tubing. The distinction matters when the equipment is built to an ASME Code.
| Designation | Material specification context |
|---|---|
| ASTM A423 Grade 1 | Low-alloy tube material specification, including tubes for pressure-containing parts such as economizers. |
| ASME SA423 Grade 1 | Related ASME Code material designation, subject to the applicable Code edition and documentation. |
ASTM identification alone does not establish ASME compliance or dual certification.
ASTM A423 Grade 1 Chemical Composition
The chemical limits below identify the Grade 1 alloy composition. Values are percentages.
| 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 Properties
Tensile strength describes the maximum pulling stress the material can withstand; yield strength indicates when permanent deformation starts. Hardness describes resistance to indentation. These properties help define the steel supplied for fabrication.
| 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.
Mill Test Certificates and Inspection
Mill test certificates and additional inspection can be requested for ASTM A423 Grade 1 and ASME SA423 Grade 1 tube orders. The documentation and inspection scope are agreed for the order.
Related Corten Steel Products We Supply
Alongside ASTM A423 Grade 1 and ASME SA423 Grade 1 tubes, ASC supplies other weathering-steel forms for fabrication and project requirements.
ASTM A423 Grade 1 Tube FAQs
What is ASTM A423 Grade 1 tubing used for?
ASTM A423 Grade 1 tubes are used in specified economizer and air-preheater assemblies, including equipment in sugar plants and power plants. The equipment design determines whether the material is suitable for the operating pressure, temperature and corrosion conditions.
Which ASTM A423 Grade 1 tube sizes can ASC quote?
We offer welded round tubes in lengths up to 56 feet. The available outside diameter, wall thickness and length combination is confirmed against your requirement. Please include dimensions and units in your enquiry.
What construction does ASC supply for ASTM A423 Grade 1 tubes?
We supply welded round ASTM A423 Grade 1 tubes. Our supply is intended for equipment fabrication and plant-maintenance requirements.
Are ASTM A423 Grade 1 and ASME SA423 Grade 1 interchangeable?
They are related specifications, but an ASTM designation alone does not establish ASME acceptance. ASME SA423 Grade 1 requirements must be checked against the applicable Code edition and documentation; dual certification must be confirmed.
Does the range include square or rectangular tubes?
Yes. ASC offers Corten A tubes in square and rectangular sections. These are a separate product from ASTM A423 Grade 1 tubes, which we supply in welded round form.
Can ASC supply test documentation or additional inspection?
Mill test certificates and additional inspection can be requested. We agree the required documentation and inspection scope for the tube order.
How are ASTM A423 Grade 1 tubes packed for export?
Wooden boxes and bundles are available. The packing option is selected for the tube dimensions and order quantity.
What determines the tube price and delivery schedule?
Price and timing depend on diameter, minimum wall, length, quantity, finish, inspection requirements, availability and destination. ASC specializes in fast delivery and prioritizes urgent export requirements.