Products Overview
Low-alloy ASTM A423 Grade 3 welded steel pipes are available in electric resistance welded (ERW) form and stocked in Gnee Steel's warehouse. These pipes can also be custom processed and CNC-cut according to customers'drawings.
ASTM A423 Grade 3 welded pipes are designed for pressure-containing applications and environments requiring good corrosion resistance and mechanical performance, making them suitable for industrial, structural, and mechanical uses.
Technical Requirements & Additional Services
The following quality and processing options are available for A423 Grade 3 welded pipes:
Hydrostatic testing or nondestructive electric testing (NDT).
Mill test certificate (MTC) in accordance with EN 10204 Type 3.1 or 3.2.
CNC cutting to meet exact dimensions and customer drawings.
Surface protection options including black coating, varnish, pickling, shot blasting, and beveled ends for easy assembly.
Mechanical Properties
| Property | Minimum Value |
|---|---|
| Yield Strength (MPa) | 230 |
| Tensile Strength (MPa) | 380 |
| Elongation in 50 mm (%) | 35 |
These properties ensure excellent ductility, toughness, and structural reliability, even under demanding operating conditions.
Chemical Composition (Heat Analysis Max %)
| Element | Max / Range % |
|---|---|
| Carbon (C) | 0.06 |
| Silicon (Si) | 0.55 |
| Manganese (Mn) | 0.70–1.40 |
| Phosphorus (P) | 0.02 |
| Sulfur (S) | 0.02 |
| Copper (Cu) | 0.25–0.45 |
| Molybdenum (Mo) | 0.20 |
| Nickel (Ni) | 0.50 |
| Antimony (Sb) | 0.05–0.15 |
This optimized low-alloy composition provides corrosion resistance, weldability, and long-term durability, making the pipes suitable for industrial piping, structural components, and pressure vessels.
Products Applications
ASTM A423 Grade 3 welded steel pipes are widely used in:
Boilers, heat exchangers, and industrial piping
Pressure vessels and economizers
Chemical and petrochemical facilities
Power plants and structural applications
These pipes offer cost-effective performance, reliability, and compliance with international standards, making them a versatile choice for engineering projects.
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.
