Looking for premium ASTM A423 Grade 1 Steel Pipe? GNEE is a leading manufacturer and supplier of Corten steel pipes and tubes, including seamless, welded (ERW), and prefabricated types.
ASTM A423 Grade 1 Steel Pipe
Our ASTM A423 GR 1 pipes are corrosion-resistant, high-strength, and designed to develop a protective rust-like patina (patina layer) over time. Ideal for pipelines, structural projects, marine transport, and outdoor installations, these pipes deliver long-term durability with minimal maintenance.
What is ASTM A423 Grade?
ASTM A423 is a low-alloy carbon steel grade known as weathering or Corten steel. It forms a protective oxide layer (patina) when exposed to harsh weather, which shields the metal from further corrosion. Grade 1 vs Grade 3:
Grade 1: Higher tensile and yield strength; widely used in pipelines and industrial applications.
Grade 3: Contains trace Mo and Sb, slightly lower strength than Grade 1.
Selecting the right ASTM A423 pipe involves evaluating:
- Operating temperature and environmental conditions
- Required pipe size and wall thickness
- Seamless vs ERW suitability
- Compliance with ASTM and ASME standards
ASTM A423 Grade 1 Pipe & Tube Specifications
| Feature | Description |
|---|---|
| Standards | ASTM A423 GR.1, ASME SA423, ASTM A847, ASTM 588, ASTM 606 |
| Grades | 1 and 3 |
| Diameter Range | ½" – 16" (custom diameters available) |
| Wall Thickness | 2 – 100 mm |
| Tube Shapes | Round, Square, Rectangle, Hydraulic, Honed Tubes |
| Tube Length | Single Random, Double Random, Cut Length |
| End Type | Plain End, Beveled End |
| Material Type | Weathering Steel / Corten Steel |
Chemical Composition of ASTM A423 Grade 1 Tubes
| Element | C | Mn | P | S | Si | Cu | Cr | Ni | Mo | Sb |
|---|---|---|---|---|---|---|---|---|---|---|
| Max % | 0.15 | 0.55 | 0.06–0.16 | 0.06 | 0.10 min | 0.20–0.60 | 0.24–1.31 | 0.20–0.70 | – | – |
This composition ensures resistance to acid, brine, ammonia, and stress corrosion cracking.
Mechanical Properties of ASTM A423 Grade 1 Pipes
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 415 |
| Yield Strength (MPa) | ≥ 255 |
| Elongation (%) | ≥ 25 |
Grade 1 pipes offer higher strength compared to Grade 3, making them ideal for pipelines, high-pressure applications, and structural uses.
ASTM A423 Pipe Size Range & Weight
| OD (in) | Nominal Pipe Size (in) | Wall Thickness (in) | Inside Diameter (in) | Weight (lbs/ft) |
|---|---|---|---|---|
| 1.660 | 1-1/4 | 0.140 | 1.380 | 2.273 |
| 1.315 | 1 | 0.133 | 1.049 | 1.679 |
| 2.875 | 2-1/2 | 0.203 | 2.469 | 5.793 |
| 6.625 | 6 | 0.280 | 6.056 | 18.97 |
| 8.625 | 8 | 0.322 | 7.981 | 28.55 |
Custom diameters and wall thicknesses are available for specific project requirements.
Applications of ASTM A423 Grade 1 Pipes & Tubes
- Outdoor sculptures and architectural installations
- Marine transportation and intermodal containers
- Air preheater units, boilers, and heat exchangers
- Petrochemical, oil & gas, and chemical plants
- Power generation, fossil fuel, and nuclear plants
- Steel mills, cement plants, breweries, and cogeneration facilities
Certification & Quality Assurance
When purchasing ASTM A423 Grade 1 Pipes, always request:
- Mill Test Certificates (MTC) verifying compliance with ASTM A423/ASME SA423 standards
- Chemical composition and mechanical property reports
- Third-party inspection reports (SGS, BV, Lloyd's)
GNEE ensures all pipes meet strict quality standards for durability and long-term performance.
Pricing & Procurement
The cost of ASME SA423 / ASTM A423 GR 1 Pipes varies based on:
Quantity ordered
Customization requirements (diameter, wall thickness, length)
Market conditions and supplier pricing strategies
Delivery location and shipping method
Contact us for a competitive quote tailored to your project.
GNEE is your trusted source for ASTM A423 Grade 1 Steel Pipes, offering corrosion-resistant, high-strength weathering steel suitable for industrial, marine, and structural applications. With seamless, welded, and ERW options, fast delivery, and full certification, our pipes ensure project reliability and longevity.
Contact us for latest 304-stainless-steel-pipe price list to request a quote and secure your order today!
Contact us for the latest ASTM A423 Grade 1 Corten Steel ERW Tubes
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.
