What is Corten grade A

Aug 22, 2025 Leave a message

 

Products Description

 

 

info-454-456Corten A is a weather-resistant steel that contains chromium, copper, and nickel. In addition, it includes phosphorous, making this steel reliable for gas applications.

 

These elements provide excellent anti-corrosive properties. The patina formed on the surface acts as a protective layer against atmospheric corrosion, keeping the underlying steel intact.

 

Corten A plates are low maintenance and have a long service life due to their high strength and natural corrosion resistance. 

 

In addition, Corten A steel has excellent weldability and can be welded using manual, spot arc, or submerged arc welding processes. 

 

Corten A steel plates manufactured by Gnee's experienced professionals have a unique and attractive appearance, making them ideal for architectural applications.

 

 

 

Chemical Composition

 

 

Grade Si (%) Ni (%) C (%) P (%) Mn (%) Cr (%) S (%) Cu (%) V (%)
Corten A  0.25-0.75 0.65 0.12 0.07-0.15 0.20-0.50 0.50-1.25 0.030 0.25-0.55 …

 

 

Equivalent Grades

 

 

Steel Grade Material No. TKS Standard EN Standard ASTM Standard
Corten A  S355JOW ASTM 588 ASTM A242 Type 2 1.8946

 

 

Mechanical Properties

 

 

Grade Minimum Yield Strength ReH (MPa) Tensile Strength Rm (MPa) Minimum Elongation A (%)
Corten A  355 470–630 20

 

 

Weight Table

 

 

Plate Size (mm) Weight
1250 x 625 x 1.5 9.2 kg
625 x 625 x 1.5 4.6 kg
2500 x 625 x 1.5 18.4 kg
2500 x 1250 x 2 49.06 kg
1250 x 1250 x 1.5 18.4 kg
625 x 625 x 2 6.13 kg
2500 x 1250 x 1.5 36.8 kg
1250 x 1250 x 2 24.53 kg
1250 x 625 x 2 12.27 kg
2500 x 625 x 2 24.53 kg

 

 

Heat Treatment

 

 

Treatment Temperature (°C)
Normalizing 860–940 (Target 910)
Stress Relieving 550–600 (Target 580)

 

 

Advantages

 

 Long Life and Durabilityinfo-454-450
The natural weathering process of Corten A extends its lifespan, with the patina acting as a corrosion-protective barrier.

 

 Low Maintenance
The self-protective nature of Corten A Steel greatly reduces maintenance needs, making it ideal for projects requiring minimal upkeep.

 

 Cost-Effectiveness
While the initial cost of Corten A Plates may be comparable to other high-performance steels, their long-term durability and low maintenance improve overall cost efficiency.

 

 

 

We Can Provide

 

 

info-472-472 Additional Condition:

  • Ultrasonic examination
  • Thermal Mechanical Control Processing
  • Quenched and Tempered
  • The Third Party Test (such as SGS Test),
  • Coated or Shot Blasting and Painting.

 

 Shipping department:

  • Book shipping space
  • Documents confirmation
  • Shipping track
  • Shipping case

 

 

 Production control department:

  • Technical evaluation
  • Production Schedule
  • Production Tracking
  • Successfully complaint case

 

Gnee Steel can offer large stock supply of Corten A weather resistant steel plate. If you are interested in Corten A weather resistant steel plate, please contact us freely, we are happy to serve you.

 

FAQ

Q: Can you weld corten steel?

A: Yes, it is possible to weld corten steel to mild steel, but it requires careful attention to detail to ensure a strong and durable weld.

Q: Do you need to seal corten steel?

A: Once the patina layer forms, corten steel requires no additional finishing like paints, stains, or sealants over time.

Q: Can you laser cut Corten?

A: Laser cutting ensures precise, high-volume production with fast turnaround.

Q: What is the difference between Corten A and B steel?

A: The two main types of Corten steel are: Corten A, which is typically used for architectural purposes and Corten B, which has been impact tested meaning it is often used in structures.

 

 

 

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