ASTM A423 Grade 1 welded steel tubes supplier. Full specifications, chemical composition, mechanical properties, and corrosion-resistant applications. Contact us for the latest A423 Grade 1 welded tube price list.
Are you sourcing ASTM A423 Grade 1 welded steel tubes for boilers, air preheaters, or industrial pressure applications? Gnee is a professional manufacturer and supplier offering ASTM A423 / A423M & ASME SA423 / SA423M Grade 1 welded and seamless tubes.
ASTM A423 Grade 1 welded steel tubes
These low-alloy steel tubes are designed for high corrosion resistance, excellent mechanical strength, and long-term durability. They are widely used in pressure-containing components, economizers, steam boilers, and air preheater units, ensuring reliability in both industrial and power plant applications.
ASTM A423 Grade 1 Welded Tube Specifications
| Property | Specification |
|---|---|
| Standard | ASTM A423 / A423M, ASME SA423 / SA423M |
| Tube Type | Seamless / Electric-Welded (ERW) |
| Rolling Type | Hot Rolled / Cold Forming |
| Wall Thickness | 0.9 mm – 12.7 mm |
| Outer Diameter (O.D) | 12.7 mm – 127 mm |
| Length | 500 mm – 18000 mm |
| Ends | Plain, Bevelled, Burr-free |
| Surface Treatment | Black, Varnish, Pickling, Shot Blasting |
| Custom Cutting | CNC cutting per customer drawings |
Mechanical Properties of ASTM A423 Grade 1 Welded Tube
| Grade | Yield Strength (MPa) Min | Tensile Strength (MPa) Min | Elongation (%) Min |
|---|---|---|---|
| A423 Grade 1 | 255 | 415 | 25 |
These properties ensure that ASTM A423 Grade 1 welded tubes can withstand high-pressure and high-temperature applications, providing long-term service life with minimal maintenance.
Chemical Composition of ASTM A423 Grade 1 Welded Tube
| Element | Max / Min % |
|---|---|
| C | 0.15 |
| Si | 0.10 min |
| Mn | 0.55 |
| P | 0.06–0.16 |
| S | 0.06 |
| Cu | 0.20–0.60 |
| Cr | 0.24–1.31 |
| Ni | 0.20–0.70 |
The balanced chemical composition enhances corrosion resistance and weldability, making the tubes suitable for industrial boiler and pressure equipment.
Applications of ASTM A423 Grade 1 Welded Tube
- Steam Generating Boilers – high-temperature corrosion-resistant tubes
- Air Preheater (APH) Units – thermal efficiency in power plants
- Economizers – long-term durability under pressure
- Industrial Chemical Plants – resistant to acidic and corrosive environments
- Fossil Fuel & Cogeneration Plants – safe operation under thermal stress
These welded tubes are also used in pressure vessels, heat exchangers, and other critical equipment, ensuring safety and reliability in harsh industrial environments.
Quality Assurance & Services
- Hydrostatic testing or nondestructive electric testing
- Mill Test Certificates (EN 10204 Type 3.1 / 3.2)
- CNC cutting according to drawings
- Surface protection with shot blasting, pickling, varnish
- Bevelled or plain ends for easy installation
Gnee ensures that every tube meets international quality standards, providing peace of mind for project managers and engineers.
ASTM A423 Grade 1 welded steel tubes are ideal for high-pressure, corrosion-resistant applications in boilers, economizers, and air preheater units. Gnee provides ready stock, full specifications, and customized solutions for your industrial requirements.
Contact us for the latest ASTM A423 Grade 1 welded tube price list and stock availability.
Contact us for the latest ASTM A423 Grade 1 welded tube price list
What is the chemical composition of ASTM A423 Grade 1?
The chemical compositions present in the A423 Gr 1 grade are carbon, phosphorus, manganese, sulfur, copper, and silicon. The high content of carbon, manganese, and sulfur provides improved oxidation resistance, pitting resistance to an acidic environment, crevice resistance, and stress corrosion cracking resistance.
What is SA 423 material?
ASTM A423 Weathering Steel Pipes Gr. 1 is popularly used in outdoor sculptures. ASTM A423 Corten Steel Tubes GRADE 1 is also used in bridge and other large structural applications. The chemical elements present in this Corten steel tube are carbon, phosphorus, manganese, sulfur, copper, silicon.
What are the common sizes and dimensions of ASTM A423 pipes?
ASTM A423 pipes are available in a variety of outer diameters, wall thicknesses, and lengths, depending on whether they are seamless or welded. The standard covers nominal pipe sizes ranging from 1/8 inch to 24 inches, with wall thickness and length varying according to application requirements.
What are the mechanical properties of ASTM A423 pipes?
These pipes are designed for high-temperature applications and therefore have high tensile strength, yield strength, and creep resistance. Typical properties include a tensile strength of 415–550 MPa, yield strength of 205–275 MPa, and elongation suitable for forming and welding. Exact values depend on the pipe grade and wall thickness.
Where are ASTM A423 pipes commonly used?
ASTM A423 pipes are widely used in boilers, heat exchangers, superheaters, and power plant equipment. They are ideal for piping systems carrying high-temperature steam, hot liquids, or gases, where corrosion resistance and dimensional stability under heat are required.
