Overview
Low-alloy ASTM A423 Grade 2 welded steel pipes are available in electric resistance welded (ERW) form and are stocked in Gnee's port warehouses, ready for immediate shipment.
All products are supplied with original mill test certificates (MTC) in accordance with EN 10204 Type 3.1 or 3.2, and can be inspected by third-party classification societies such as BV, SGS, TUV, LR, ABS, or DNV-GL.
These pipes are designed for pressure-containing applications and environments where corrosion resistance and structural reliability are critical.
Technical Requirements & Additional Services
For A423 Grade 2 welded steel pipes, Gnee provides:
Hydrostatic testing or nondestructive electric testing (NDT).
Mill Test Certificates (MTC) with EN 10204 Type 3.1 or 3.2.
CNC cutting to customer-specified dimensions and drawings.
Surface protection options: black coating, varnish, pickling, shot blasting, and beveled end connections.
Mechanical Properties
| Property | Minimum Value |
|---|---|
| Yield Strength (MPa) | 255 |
| Tensile Strength (MPa) | 415 |
| Elongation in 50 mm (%) | 25 |
These mechanical properties ensure high strength, toughness, and ductility, suitable for a wide range of industrial and structural applications.
Chemical Composition (Heat Analysis Max %)
| Element | Max / Min % |
|---|---|
| Carbon (C) | 0.15 |
| Silicon (Si) | – |
| Manganese (Mn) | 0.50–1.00 |
| Phosphorus (P) | 0.04 |
| Sulfur (S) | 0.05 |
| Copper (Cu) | 0.20–0.60 |
| Molybdenum (Mo) | ≥ 0.10 |
| Nickel (Ni) | 0.40–1.10 |
This carefully controlled alloy composition provides corrosion resistance, weldability, and long-term durability.
Products Applications
ASTM A423 Grade 2 welded steel pipes are suitable for:
- Boilers, economizers, and heat exchangers
- Industrial piping and pressure vessels
- Chemical, petrochemical, and power plant applications
- Structural and mechanical engineering projects
With high corrosion resistance, mechanical strength, and compliance with international standards, these pipes are a versatile and reliable choice for demanding industrial and structural environments.
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.
