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ASTM A36 Black Carbon Steel Plate - High-Quality Factory Supplier in China for Construction and Manufacturing

Steel plates are a flat-rolled steel product known for their significant thickness, distinguishing them from steel sheets. In the steel industry, products thicker than 4.5 mm are categorized as steel plates, while those exceeding 100 mm are classified as thick steel plates. These high-quality steel plates are produced in factories through advanced hot rolling processes, utilizing slabs made from continuous casting. After rolling, they are precisely tailored to meet specific dimensions and cooled before being cut to final sizes. Thanks to their superior strength, remarkable toughness, and excellent weldability, steel plates are highly sought after by various industries, including shipbuilding, construction, bridges, machinery, and pressure vessels. As a leading supplier in China, our factory ensures the highest standards in steel plate production to meet your manufacturing needs

    Specifications

    Parameter Range / Options
    Thickness 4.5 mm – 25 mm
    Width 500 mm – 5300 mm
    Length 3000 mm – 27000 mm

    Material Standards & Grades

    Standard Common Grades
    ASTM A36, A283 Grade A/B/C/D, A285, A299, A516 Grade 60/65/70, A529 Grade 50/55, A572 Grade 50/55/60/65, A573 Grade 65/70
    EN 10025-2 S235JR/J0/J2, S275JR/J0/J2, S355JR/J0/J2
    JIS G3101 (SS330, SS400, SS490), G3106 (SM400A/B/C, SM490A/B/C), G4051 (S10C-S55C)
    GB/T Q235A/B/C/D, Q275, Q295, Q345A/B/C/D/E, Q390, Q420, Q460, Q500, Q550, Q620, Q800
    DIN ST37-2, ST37-3, ST52-3
    AS/NZS 250 Grade, 350 Grade (AS/NZS 3678)

    Surface Finishes & Coatings

    • Natural / Black As-rolled with mill scale, often requiring secondary cleaning before any further industrial processing operations.
    • Coated / Galvanized Zinc coating for corrosion resistance, providing a highly durable barrier against harsh environmental weather conditions effectively.
    • Primed / Painted Shop-applied primer or paint coating, intended to protect structural components from oxidation during storage and transportation.
    • Shot Blasted / Pickled Cleaned surface for further treatment, ensuring that all loose contaminants are removed for superior bonding performance.
    • Sand Blasting Surface preparation for painting or inspection, creating a uniform texture which maximizes adhesion for heavy duty coatings.

    Packaging & Delivery

    Packaging
    Standard export seaworthy packing or as required
    Protection
    Oiled, coated, or wrapped for corrosion protection during transit
    Identification
    Tags indicating grade, heat number, dimensions, and quantity
    Delivery Time
    20–50 days (7 days for stock items)
    Loading Port
    Tianjin
    MOQ
    1 piece

    Frequently Asked Questions

    Q
    What thickness range is available for hot rolled steel plates?
    Hot rolled steel plates are available in thicknesses ranging from 4.5 mm to 25 mm, with widths from 500 mm to 5300 mm and lengths from 3000 mm to 27000 mm, accommodating a wide variety of structural and industrial applications.
    Q
    Which international material standards are supported?
    We supply steel plates conforming to major international standards including ASTM, EN 10025-2, JIS, GB/T, DIN, and AS/NZS. Common grades such as A36, S355JR, Q345, SS400, and ST52-3 are all available to meet your project specifications.
    Q
    What surface finish options are offered for steel plates?
    We offer five surface finish options: Natural/Black (as-rolled), Coated/Galvanized (zinc coating), Primed/Painted (shop-applied primer), Shot Blasted/Pickled (cleaned surface), and Sand Blasted (surface prepared for painting or inspection).
    Q
    What is the minimum order quantity (MOQ)?
    The minimum order quantity is 1 piece, making it convenient for both small-scale projects and large bulk orders. There are no restrictions on order size, and we can accommodate custom requirements upon request.
    Q
    How long does delivery take, and what is the loading port?
    Standard delivery time is 20–50 days from order confirmation. For in-stock items, delivery can be arranged within 7 days. All shipments are loaded from Tianjin Port, China, using standard export seaworthy packaging.
    Q
    How are steel plates protected during shipping?
    Each steel plate is oiled, coated, or wrapped to ensure full corrosion protection throughout transit. Every shipment is clearly identified with tags showing the grade, heat number, dimensions, and quantity, ensuring full traceability upon arrival.