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

Steel plates are a type of flat-rolled steel product known for their significant thickness, typically greater than 4.5 mm. In fact, those exceeding 100 mm are categorized as thick steel plates. Manufactured in China through advanced hot rolling processes, these steel plates begin as slabs produced via continuous casting. The slabs are then precisely shaped to required dimensions through rolling and cooling, ultimately being cut to size. Steel plates are highly sought after for their exceptional strength, robust toughness, and excellent weldability. They are widely utilized in various industries, including shipbuilding, construction, bridges, machinery, and pressure vessels. As a leading steel plate factory and supplier in China, we prioritize quality and performance, catering to the demands of diverse manufacturing sectors

    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

    Our steel plates are available in thicknesses ranging from 4.5 mm to 25 mm, widths from 500 mm to 5300 mm, and lengths from 3000 mm to 27000 mm. Custom dimensions can be discussed based on your project requirements.
    We supply steel plates conforming to a wide range of international standards including ASTM, EN 10025-2, JIS, GB/T, DIN, and AS/NZS. Common grades such as A36, S355JR, Q345, and SS400 are regularly available from stock.
    We offer five main surface finish options: Natural/Black (as-rolled), Coated/Galvanized (zinc coating), Primed/Painted (shop-applied primer), Shot Blasted/Pickled (cleaned surface), and Sand Blasting (for painting or inspection preparation). Each finish is suited to specific application and environmental requirements.
    All steel plates are packed in standard export seaworthy packaging or customized as required. They are oiled, coated, or wrapped to prevent corrosion during transit. Each bundle is clearly tagged with grade, heat number, dimensions, and quantity for easy identification upon arrival.
    Standard delivery time is 20–50 days depending on the order size and specifications. For stock items, delivery can be arranged within 7 days. There is no large minimum order requirement — we accept orders from as little as 1 piece, making us suitable for both small and large-scale projects.
    All shipments are loaded from Tianjin Port, one of China's major international shipping hubs. We provide full export documentation including mill test certificates, packing lists, and commercial invoices to ensure smooth customs clearance at your destination.