Learn About the Latest ASTM A588/A588M Steel Plate/Sheet Price, Specifications and Dimensions.
High-Strength ASTM A588/A588M Weathering Steel Plate for Outdoor Structures
| Item | Details |
| Material Standard | ASTM A588/A588M steel plate |
| Grade | Grade A, GradeB, Grade C, Grade D |
| Typical Width | 1,000 mm – 2,500 mm |
| Typical Length | 6,000 mm – 12,000 mm (customizable) |
| Tensile Strength | 490–620 MPa |
| Yield Strength | 355–450 MPa |
| Advantage | High Strength, Excellent Corrosion Resistance, and Low Maintenance for Long-lasting Outdoor Structures |
| Quality Inspection | Ultrasonic Testing (UT), Magnetic Particle Testing (MPT), ISO 9001, SGS/BV Third-Party Inspection |
| Application | Bridges, Buildings, Towers, Marine Structures, and Industrial Outdoor Applications |
Chemical Composition (Typical Range)
ASTM A588/A588M Steel Plate/Sheet Chemical Composition
| Element | Carbon (C) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulfur (S) | Copper (Cu) | Chromium (Cr) | Nickel (Ni) | Niobium (Nb) | Vanadium (V) | Titanium (Ti) |
| Max / Range | 0.23% max | 1.35% max | 0.20–0.50% | 0.030% max | 0.030% max | 0.25–0.55% | 0.40% max | 0.65% max | 0.05% max | 0.05% max | 0.02–0.05% |
ASTM A588/A588M Steel Plate/Sheet Mechanical Property
| Grade | Thickness Range | Minimum Yield Strength (MPa / ksi) | Tensile Strength (MPa / ksi) | Notes |
| Grade A | ≤ 19 mm | 345 MPa / 50 ksi | 490–620 MPa / 71–90 ksi | Thin plates are commonly used in bridge and building steel structures. |
| Grade B | 20–50 mm | 345–355 MPa / 50–51 ksi | 490–620 MPa / 71–90 ksi | Medium-thick plates are used in heavy structures, such as bridge main beams and towers. |
| Grade C | > 50 mm | 355 MPa / 51 ksi | 490–620 MPa / 71–90 ksi | Thick plates are used in large industrial structures. |
| Grade D | Customized | 355–450 MPa / 51–65 ksi | 490–620 MPa / 71–90 ksi | For specialized engineering projects, high yield strength is provided. |
ASTM A588/A588M Steel Plate/Sheet Sizes
| Parameter | Range |
| Thickness | 2 mm – 200 mm |
| Width | 1,000 mm – 2,500 mm |
| Length | 6,000 mm – 12,000 mm (custom sizes available) |
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1. Raw Material Selection
High-quality iron ore, scrap steel, and alloying elements such as Cu, Cr, Ni, and Si are selected to ensure the required weathering performance and mechanical strength.
2. Steelmaking (Converter or Electric Arc Furnace)
The raw materials are melted in a converter or electric arc furnace.
Precise chemical composition control ensures corrosion resistance and high-strength properties.
3. Secondary Refining (LF/VD/VD+RH)
Ladle furnace refining removes impurities such as sulfur and phosphorus.
Alloying elements are adjusted to meet ASTM A588/A588M chemical requirements.
4. Continuous Casting (Slab Casting)
The molten steel is cast into slabs.
Casting quality determines surface quality, internal cleanliness, and structural stability of the final plate.
5. Hot Rolling Process
Slabs are reheated and rolled into required thicknesses.
Controlled rolling and controlled cooling ensure uniform grain structure and stable mechanical properties.
6. Cooling & Weathering Structure Formation
Proper cooling (air cooling or accelerated cooling) helps form fine microstructures
that contribute to high yield strength and controlled corrosion performance.
7. Heat Treatment (if required)
Depending on thickness and grade, the plates may undergo normalizing or tempering
to improve toughness, homogeneity, and impact resistance.
8. Surface Treatment
Surface cleaning, descaling, and trimming are performed.
The plate surface is prepared for optional painting, blasting, or bare weathering exposure.
9. Cutting, Leveling & Finishing
The steel plates are cut to required lengths and widths.
Edge cutting, leveling, and flatness control are performed to meet dimensional tolerances.
10. Quality Control & Testing
Mechanical tests (yield strength, tensile strength, elongation), chemical analysis,
impact tests, ultrasonic testing, and dimensional inspections ensure compliance with ASTM A588/A588M.
11. Packaging & Delivery
Plates are packaged with anti-rust measures (strapping, edge protectors, waterproof wrapping)
and shipped according to customer requirements.
ASTM A588/A588M is a high-strength low-alloy (HSLA) structural steel known for its excellent atmospheric corrosion resistance—often referred to as weathering steel. Its ability to form a protective rust-like patina makes it ideal for long-term outdoor use with minimal maintenance.
1. Bridges & Structural Engineering
Used for durable bridge and structural components requiring high strength and long-term outdoor performance.
2. Architectural & Landscaping Projects
Ideal for decorative facades and landscape features that benefit from a modern weathered appearance.
3. Railway & Highway Construction
Applied in guardrails, poles, and transport infrastructure needing strong atmospheric corrosion resistance.
4. Industrial Facilities
Suitable for tanks, chimneys, and industrial frames exposed to moisture and harsh outdoor conditions.
5. Marine & Coastal Applications
Performs reliably in docks, piers, and coastal structures subjected to salt spray and humid air.
6. Outdoor Machinery & Equipment
Used for outdoor machinery parts that demand long service life and resistance to weathering.
1) Branch Office - Spanish-speaking support, customs clearance assistance, etc.
2) Over 5,000 tons of stock in stock, with a wide variety of sizes
3) Inspected by authoritative organizations such as CCIC, SGS, BV, and TUV, with standard seaworthy packaging
| No. | Inspection Item | Description / Requirements | Tools Used |
| 1 | Document Review | Verify MTC, material grade, standards (ASTM/EN/GB), heat number, batch, size, quantity, chemical & mechanical properties. | MTC, order documents |
| 2 | Visual Inspection | Check for cracks, folds, inclusions, dents, rust, scale, scratches, pits, waviness, edge quality. | Visual check, flashlight, magnifier |
| 3 | Dimensional Inspection | Measure thickness, width, length, flatness, edge squareness, angle deviation; confirm tolerances meet ASTM A6/EN 10029/GB standards. | Caliper, tape measure, steel ruler, ultrasonic thickness gauge |
| 4 | Weight Verification | Compare actual weight with theoretical weight; confirm within allowable tolerance (typically ±1%). | Weighing scale, weight calcula |
1. Stacked Bundles
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Steel plates are stacked neatly by size.
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Wooden or steel spacers are placed between layers.
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Bundles are secured with steel straps.
2. Crate or Pallet Packaging
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Small-size or high-grade plates can be packed in wooden crates or on pallets.
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Moisture-proof materials like rust-preventive paper or plastic film can be added inside.
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Suitable for export and easy handling.
3. Bulk Shipping
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Large plates may be transported by ship or truck in bulk.
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Wooden pads and protective materials are used to prevent collision.
Stable cooperation with shipping companies such as MSK, MSC, COSCO efficiently logistics service chain, logistics service chain are we to your satisfaction.
We follow the standards of quality management system ISO9001 in all procedure, and have strict control from packaging material purchase to transport vehicle scheduling. This guarantees the H-beams from the factory all the way to the project site, helping you build on a solid foundation for a trouble free project!
1. What are the key advantages of ASTM A588 weathering steel?
Excellent atmospheric corrosion resistance
High yield and tensile strength
Reduced maintenance cost (no painting required)
Good weldability and formability
Long service life for outdoor applications
2. Do ASTM A588 steel plates require painting or coating?
No.
They form a natural protective oxide layer that slows corrosion.
However, painting is optional for aesthetic purposes or special environments.
3. Can ASTM A588 steel be welded?
Yes.
A588 steel has good weldability using standard welding processes (SMAW, GMAW, FCAW).
Preheating may be required for thicker sections.
4. How is ASTM A588 different from Corten steel?
ASTM A588 is a standardized weathering steel, while “Corten steel” is a trade name.
Both provide similar corrosion resistance and appearance.
5. Is ASTM A588 suitable for marine environments?
Yes, but performance depends on salt exposure.
For direct marine contact, additional coating may improve longevity.
6. Can ASTM A588 withstand low temperatures?
Yes.
It offers good impact toughness and ductility at low temperatures.
7. Do ASTM A588 steel plates need special storage?
Store them dry and well-ventilated.
Moisture stagnation may create uneven rusting during the early weathering stage.
8. Are customized cutting, bending, and fabrication available?
Yes—A588 plates can be laser-cut, plasma-cut, bent, welded, and formed based on client designs.
Contact Details
Address
Kangsheng development industry zone,
Wuqing district, Tianjin city, China.
Phone
Hours
Monday-Sunday: 24-hour Service
