ASTM A588 is a high-strength, low-alloy weathering steel that offers superior corrosion resistance in outdoor environments. Also known as ASTM A588 Corten or ASTM A588 Weathering Steel, this material forms a stable rust-like appearance, which enhances its longevity by preventing further oxidation. Its self-protecting properties make it an ideal choice for various structural and architectural applications.
This steel is widely used in infrastructure projects where exposure to harsh weather conditions is common. It is frequently utilized in bridge construction, building facades, industrial equipment, and transportation sectors due to its high durability and reduced maintenance needs. Emirerri Steel supplies high-quality ASTM A588 steel for various industries, ensuring durability, strength, and performance in all applications.
ASTM A588 Specifications
ASTM A588 is available in various product forms, including structural shapes, sheets, tubes, and bars. It is designed for use in welded, bolted, or riveted construction applications where high strength and corrosion resistance are required.
• Standard: ASTM A588/A588M
• Product Forms: Sheet, Plate, Tube, Pipe, Coil, Bar, and Structural Shapes
• Grades: ASTM A588 Grade A, ASTM A588 Grade B, ASTM A588 Grade K
• Corrosion Resistance: Develops a protective oxide layer to prevent degradation
• Applications: Bridges, buildings, power transmission towers, industrial chimneys, railway vehicles, and marine structures
• Weldability: Excellent, but preheating may be necessary for thick sections
ASTM A588 Grades and Their Features
Each grade of ASTM A588 is designed to meet specific application needs and environmental conditions.
ASTM A588 Grade A
• Yield Strength: 50 ksi (345 MPa)
• Tensile Strength: 70 ksi (485 MPa)
• Common Uses: Bridges, building exteriors, railway cars, and decorative structures
ASTM A588 Grade B
• Yield Strength: 50 ksi (345 MPa)
• Tensile Strength: 70 ksi (485 MPa)
• Common Uses: Power transmission towers, marine structures, and industrial chimneys
ASTM A588 Grade K
• Yield Strength: 42 ksi (290 MPa)
• Tensile Strength: 63 ksi (435 MPa)
• Common Uses: Heavy industrial equipment, railway infrastructure, and harsh outdoor environments
ASTM A588 Chemical Composition
The chemical composition of ASTM A588 contributes to its unique weathering properties. The presence of specific alloying elements enhances its ability to form a protective patina over time.
Chemical Composition (%):
• Carbon (C): 0.19 max
• Manganese (Mn): 0.80 - 1.25
• Phosphorus (P): 0.04 max
• Sulfur (S): 0.05 max
• Silicon (Si): 0.30 - 0.50
• Copper (Cu): 0.25 - 0.40
• Chromium (Cr): 0.40 - 0.65
• Nickel (Ni): 0.40 max
• Vanadium (V): 0.02 - 0.10
ASTM A588 Mechanical Properties
ASTM A588 steel is known for its excellent mechanical properties, making it suitable for demanding structural applications.
Mechanical Properties:
• Grade A & B:
o Yield Strength: 50 ksi (345 MPa)
o Tensile Strength: 70 ksi (485 MPa)
o Elongation: 18% min (in 8"
o Hardness: Brinell 135-190
o Impact Strength: High toughness
• Grade K:
o Yield Strength: 42 ksi (290 MPa)
o Tensile Strength: 63 ksi (435 MPa)
o Elongation: 19% min (in 8"
o Hardness: Brinell 135-190
o Impact Strength: High toughness
ASTM A588 Applications
Due to its corrosion-resistant nature and high strength, ASTM A588 steel is widely used in various industries:
• Bridges and highway overpasses – Reduces maintenance costs due to weathering resistance
• Building exteriors and facades – Provides aesthetic appeal and long-term durability
• Transmission towers and poles – Withstands harsh environmental conditions
• Marine and offshore structures – Resists moisture and salt exposure
• Railway cars and industrial equipment – Ideal for rugged applications
• Sculptures and decorative structures – Offers an attractive rusted appearance
ASTM A588 Steel Equivalent Materials
Several international standards provide steel with similar properties to ASTM A588:
• EN 10025-5 S355J2W (European Standard)
• JIS G3125 SPA-H (Japanese Standard)
• IRSM 41-97 (Indian Standard)
• GB/T 4171 Q355NH (Chinese Standard)
• A242 Type 1 (Alternative U.S. weathering steel standard)
Key Benefits of ASTM A588 Material
• Superior Corrosion Resistance: Forms a stable patina that protects against further corrosion
• High Strength: Excellent load-bearing capability for structural applications
• Cost Efficiency: Reduces long-term maintenance expenses by eliminating painting requirements
• Eco-Friendly: 100% recyclable material with sustainable attributes
• Versatility: Used across numerous industries, from construction to transportation
• Distinct Appearance: The rustic, weathered look is often used for architectural appeal
ASTM A588 Fabrication and Welding Considerations
ASTM A588 can be easily fabricated into various shapes using standard processing techniques. However, when welding, special considerations should be taken:
• Preheating: Required for thicker sections to prevent cracking
• Filler Metal Selection: Low-alloy electrodes recommended for optimal performance
• Post-Weld Treatment: Helps maintain corrosion resistance and strength
ASTM A588 Availability and Sizing
ASTM A588 steel is available in multiple dimensions to suit different industrial and construction needs.
• Sheet & Coil Thickness: 1.6mm - 100mm
• Tube Outer Diameter (OD): 10mm - 500mm
• Wall Thickness (WT): 1mm - 50mm
• Length Options: 6m, 12m, or custom sizes
