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ASTM A36 Black Carbon Steel Plate - High Strength Steel Plates from China Suppliers and Factory

Steel plate, a flat-rolled steel product renowned for its significant thickness, is essential in various industrial applications. In China, leading suppliers and factories produce steel plates with a thickness exceeding 4.5 mm, while those surpassing 100 mm are categorized as thick steel plates. These products are created through advanced hot rolling processes, starting from continuous casting slabs that are precisely shaped and cooled to achieve exact dimensions before being cut into final sizes. Known for their remarkable strength, superior toughness, and excellent weldability, steel plates serve critical roles in shipbuilding, construction, bridge engineering, machinery manufacturing, and pressure vessel production. Choose reliable suppliers and factories in China for high-quality steel plates tailored to your 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 your steel plates?
    Our 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 do you support?
    We supply steel plates conforming to multiple international standards including ASTM, EN 10025-2, JIS, GB/T, DIN, and AS/NZS, covering a comprehensive range of structural and high-strength grades to meet global project requirements.
    Q What surface finish options are available?
    We offer five main surface finish options: Natural/Black (as-rolled), Coated/Galvanized, Primed/Painted, Shot Blasted/Pickled, and Sand Blasted. Each finish is suited to different end-use environments and downstream processing requirements.
    Q What is the minimum order quantity (MOQ)?
    Our minimum order quantity is 1 piece, making it easy for customers who need small quantities for specific projects or testing purposes. Larger orders are equally welcome with competitive pricing.
    Q How long is the delivery lead time?
    Standard delivery time is 20 to 50 days depending on order specifications and production schedule. For in-stock items, delivery can be arranged within 7 days. All shipments are loaded from Tianjin port.
    Q How are the steel plates packaged and protected during shipping?
    All steel plates are packed in standard export seaworthy packaging and protected through oiling, coating, or wrapping to prevent corrosion during transit. Each package is clearly identified with tags showing grade, heat number, dimensions, and quantity.