Corten B Steel Plates – Everything You Need To Know

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Corten B Steel Plates - Everything You Need To Know

Corten B Steel plates

What is Corten B Steel plates?

Corten B steel plates, also known as “Cor-Ten B” or simply “Corten B,” are a type of weathering steel alloy. This steel alloy includes small amounts of copper, chromium, and nickel, which endow it with unique properties. These elements enhance its resistance to atmospheric corrosion, allowing it to form a protective rust-like layer when exposed to the elements. This layer, or patina, not only gives Corten B its distinct appearance but also provides excellent protection against further corrosion. 

As a result, Corten B is widely used in various industries, particularly in architecture, construction, and outdoor applications. Its weather-resistant characteristics make it ideal for structures and projects that are exposed to the elements, reducing the need for additional protective coatings and lowering maintenance requirements.

Key features of Corten B steel plate include

  1. Weather Resistance: Corten B steel plates develop a protective rust-like surface when exposed to the elements, providing excellent resistance to atmospheric corrosion and preventing further deterioration.
  2. Aesthetic Appeal: The rusted appearance of Corten B is aesthetically pleasing, making it popular in architectural, artistic, and landscaping projects where a weathered or rustic look is desired.
  3. High Strength: Despite its rusting process, Corten B steel maintains its structural integrity and strength, making it suitable for various structural applications that require durability.
  4. Low Maintenance: The self-protecting rust layer eliminates the need for frequent maintenance and painting, reducing long-term costs and effort.
  5. Versatility: Corten B steel plates find use in diverse applications such as architectural facades, bridges, outdoor sculptures, cladding, containers, and more, showcasing its versatility.
  6. Longevity: Due to its corrosion-resistant properties, Corten B steel has a long lifespan, remaining durable and sturdy for many years without significant degradation.

Specifications of Corten B Steel Plates

Corten B steel plates’ specifications can vary depending on the manufacturer and project requirements. However, here are general specifications and properties according to common standards:

ASTM Standard (U.S.):

  • ASTM A588: Corten B steel plates often meet ASTM A588, a standard for high-strength, low-alloy structural steel with improved atmospheric corrosion resistance.

EN Standard (European Union):

  • EN 10025-5: Corten B steel plates can conform to EN 10025-5, which specifies hot-rolled structural steel products with enhanced atmospheric corrosion resistance.

JIS Standard (Japan):

  • JIS G3125: In Japan, Corten B steel plates may adhere to JIS G3125, a standard for high-strength, low-alloy, and weather-resistant steel.
Specifications ASTM A588/ ASME SA588
Width 1500-3200mm
Length 6000-12000mm
Thickness 2-460mm
Hot Rolled Corten steel A Plate size 3-150mm * 900-4100mm * 3000-18000mm

Chemical Composition of Corten B Steel Plates

Corten B steel plates’ chemical composition generally meets standards like ASTM A588, EN 10025-5, or similar equivalents. While the precise composition can vary slightly among manufacturers and grades, here’s a typical range for Corten B steel plates:

Additionally, trace amounts of other elements may be present based on the grade and manufacturing method.

These elements contribute to Corten B steel’s unique properties, like weather resistance and corrosion resistance. Copper, especially, plays a crucial role in forming the protective rust layer that defines Corten steel’s appearance and protective qualities.

Corten B0.19 max0.30 – 0.650.80 – 1.250.035 max0.030 max0.40 – 0.650.40 max0.25 – 0.400.020 – 0.060.02 – 0.10

Equivalent Grades of Corten B Steel Plates

Corten B steel plates often have equivalent grades in various international standards, depending on the specific steel standard and country. These equivalent grades provide options for sourcing Corten B steel plates globally while ensuring similar properties and performance. Here are some commonly recognized equivalent grades of Corten B steel plates:

  • ASTM A588 Grade B: Equivalent to Corten B in the United States, ASTM A588 Grade B is often used interchangeably due to similar properties.
  • S355J2W: In the European Union, S355J2W closely resembles Corten B and conforms to the EN 10025-5 standard for structural steels with improved atmospheric corrosion resistance.
  • JIS G3125 SPA-H: Japan’s equivalent to Corten B steel, JIS G3125 SPA-H, offers comparable weathering characteristics suitable for various applications.
  • BS 4360 WR 50 B: In the United Kingdom, BS 4360 WR 50 B serves as an equivalent grade for Corten B, providing similar weather-resistant properties.
Steel GradeEN 10025-5:2004
COR-TEN BS355J0W and S355J2W

Mechanical Properties of Corten B Steel Plates

The strength and characteristics of Corten B steel plates can vary slightly based on factors like plate thickness and how they’re made. Here’s a general overview of what you can expect from Corten B steel plates, following common standards like ASTM A588 and EN 10025-5:

ASTM Standard (U.S.):

  • Tensile Strength: At least 485 MPa (a measure of how strong the steel is when pulled)
  • Yield Strength: At least 345 MPa (the stress at which the steel starts to deform)
  • Elongation: At least 21% (how much the steel can stretch before breaking)

EN Standard (European Union):

  • Tensile Strength: Between 485 MPa and 630 MPa
  • Yield Strength: At least 345 MPa
  • Elongation: At least 22%

Charpy V-Notch Impact Test (Typical):

  • The steel can withstand a minimum impact of 27 Joules at -20°C (-4°F) without breaking.
GradeYield strength ReL N/mm² MinimumTensile strength Rm N/mm² MinimumElongation A50 % Minimum
Corten B34548519

Leading Supplier of Corten Steel B Plates & Sheet

As a leading supplier of Corten Steel B Plates & Sheet, we take pride in providing high-quality products that meet international standards and customer expectations. Our Corten B Steel Plates & Sheet are known for their durability, weather resistance, and aesthetic appeal, making them suitable for a wide range of applications.

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If you have any requirements for Corten Steel B Plates & Sheet or Corten Steel Plates & Sheets or any Corten Steel Products we invite you to explore our website and consider purchasing from us. 

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