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Corten B Plates

Corten B Plates
Material Grade: ASTM A588 / ASME SA588 Corten B
Material Type: Heavy-Section Weathering Steel
Structural Strength: 50,000 psi (345 MPa) Minimum Yield
Primary Advantage: Enhanced Weldability in Thick Plates
Corrosion Property: Atmospheric Corrosion Resistant (Patina Forming)
Economic Edge: Maintenance-Free Longevity (No Painting)
Thickness Range: 6.0 mm to 200 mm
Primary Industries: Bridge Girders, Transmission Towers, & Heavy Frames
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Corten B Plates, classified under the ASTM A588 specification, are high-strength, low-alloy weathering steels designed specifically for structural applications where heavy sections and superior weldability are required. Unlike Corten A, which is optimized for thinner sheets, Corten B is engineered to maintain its mechanical integrity and atmospheric corrosion resistance in much thicker gauges. When exposed to outdoor environments, the steel undergoes a natural oxidation process, developing a dense, protective ferric oxide patina. This self-healing layer effectively seals the core steel from moisture and oxygen, drastically reducing the corrosion rate and making it an ideal candidate for large-scale outdoor infrastructure.

The technical advantage of ASTM A588 Corten B lies in its balanced chemical composition, which provides high notch toughness and excellent joining characteristics. Because it requires no painting or galvanizing, it offers a sustainable, maintenance-free solution that significantly lowers the total lifecycle cost of a project. Its robust structural profile and characteristic deep-brown finish make it the industry standard for highway bridges, rail cars, transmission towers, and heavy structural frameworks. By utilizing Corten B, engineers can ensure long-term structural reliability and safety in demanding environments, all while benefiting from the organic, evolving aesthetic of weathered steel.



Corten B Plates Features

  • » Superior Structural Strength: Offers a high minimum yield strength of 50,000 psi (345 MPa), providing robust load-bearing capacity for heavy engineering and infrastructure.
  • » Optimized for Thick Sections: Specifically designed to maintain mechanical properties and corrosion resistance in plates exceeding 12mm, making it ideal for large-scale structural members.
  • » Atmospheric Corrosion Shield: Develops a dense, protective iron-oxide patina that prevents deep-seated rusting and protects the internal steel from environmental degradation.
  • » Exceptional Weldability: Features a chemical composition tailored for superior weld integrity, making it the preferred weathering grade for heavy welded bridge girders and frames.
  • » Cost-Effective Maintenance: Eliminates the recurring costs associated with protective painting, sandblasting, and coating inspections over the lifespan of the structure.
  • » High Notch Toughness: Engineered to resist brittle fracture and crack propagation, ensuring structural safety even under extreme mechanical stress and varying temperatures.
  • » Weather-Driven Aesthetics: Produces a rich, dark-brown textured finish that evolves over time, providing a natural, industrial appearance that requires no cosmetic upkeep.
  • » Sustainable and Recyclable: A "green" building material that is 100% recyclable and avoids the environmental impact of volatile organic compounds (VOCs) found in industrial paints.

Corten B Plates Specification

Standards

  • ASTM: A588 Grade B
  • ASME: SA588
  • EN Equivalent: S355J2W
  • Steel Category: HSLA Weathering

Chemistry

  • Carbon (C): 0.20% Max
  • Manganese (Mn): 0.75% - 1.35%
  • Chromium (Cr): 0.40% - 0.70%
  • Vanadium (V): 0.01% - 0.10%

Strength

  • Yield Strength: 345 MPa (Min)
  • Tensile Strength: 485 MPa (Min)
  • Elongation: 21% (in 200mm)
  • Notch Toughness: High Impact Resistance

Processing

  • Welding: Superior (Low Phosphorus)
  • Forming: Cold & Hot Formable
  • Cutting: Flame / Laser / Plasma
  • Surface State: Natural / Pre-weathered

Availability

  • Thickness: 6 mm to 200 mm
  • Width: Up to 3500 mm
  • Length: Up to 15000 mm
  • Shapes: Plates, Sheets, & Coils

Quality

  • MTC: EN 10204 3.1 / 3.2
  • Testing: Charpy V-Notch (Optional)
  • Certification: ISO / CE Compliant
  • Supply: Fully Traceable Mill Stock

Corten B Plates Detailed Specifications

Property Specification
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

Corten B Plates Chemical Composition

Grade C Si Mn P S Cr Ni Cu Al V
Corten B 0.19 max 0.30 – 0.65 0.80 – 1.25 0.035 max 0.030 max 0.40 – 0.65 0.40 max 0.25 – 0.40 0.020 – 0.06 0.02 – 0.10

Corten B Plates Mechanical Properties

Grade Yield strength
ReL N/mm² Minimum
Tensile strength Rm N/mm² Minimum Elongation A50%
Minimum
Corten B 345 485 19

Corten B Plates Equivalent Grades

Steel Grade EN 10025-5:2004
COR-TEN B S355J0W and S355J2W

Industrial Locations & Keywords

Industrial Locations & Keywords
Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair)
Jeddah Industrial Cities (1st, 2nd & 3rd)
Dammam Industrial Areas (1st, 2nd & 3rd)
Jubail Industrial City
Yanbu Industrial City
Rabigh Industrial City
Al Khobar Industrial Area
Al Ahsa Industrial City
Madinah Industrial City
Makkah Industrial City
Taif Industrial City
Tabuk Industrial City
Jazan Industrial City
Industrial supplier in Saudi Arabia
Pipe fittings supplier in Jubail / Dammam / Riyadh
Flange and valve supplier Saudi Arabia
Fast delivery industrial materials KSA
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