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Q235B / Q355B Structural Carbon Steel Plate | Medium Thickness Hot Rolled Steel Sheets

Q235B / Q355B Structural Carbon Steel Plate | Medium Thickness Hot Rolled Steel Sheets Featured Image
  • Q235B / Q355B Structural Carbon Steel Plate | Medium Thickness Hot Rolled Steel Sheets
  • Q235B / Q355B Structural Carbon Steel Plate | Medium Thickness Hot Rolled Steel Sheets
  • Q235B / Q355B Structural Carbon Steel Plate | Medium Thickness Hot Rolled Steel Sheets

Short Description:

Excellent strength, weldability and toughness of the hot rolled medium thick carbon steel plate Q235B, Q355B high quality Q235B and Q355B hot rolled medium thick carbon steel plate. Commonly used and readily available in the construction, machinery, shipbuilding and engineering applications, offered in various sizes with a steady export supply and agreeable quotation.


  • Processing Services: Bending, Decoiling, Cutting, Punching
  • Inspection: SGS, TUV, BV, factory inspection
  • Standard: GB Q235B Q355B
  • Width: customize
  • Application: building materials
  • Certificate: JIS, ISO9001, BV BIS ISO
  • Delivery Time: 3-15 days (according to the actual tonnage)
  • Port Information: Tianjin Port, Shanghai Port, Qingdao Port, etc.
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    Product Detail

    Product Tags

    STEEL PLATE

    Product Detail

    Chemical Composition (Typical for Q235B & Q355B)

    Q235B Carbon Steel Plate

    Element Content (%)
    Carbon (C) ≤ 0.22
    Silicon (Si) ≤ 0.35
    Manganese (Mn) ≤ 1.40
    Phosphorus (P) ≤ 0.045
    Sulfur (S) ≤ 0.045

    Q355B Carbon Steel Plate

    Element Content (%)
    Carbon (C) ≤ 0.24
    Silicon (Si) ≤ 0.55
    Manganese (Mn) ≤ 1.60
    Phosphorus (P) ≤ 0.035
    Sulfur (S) ≤ 0.035
    Niobium (Nb) ≤ 0.07
    Vanadium (V) ≤ 0.15
    Titanium (Ti) ≤ 0.20

    These chemical compositions make Q235B good for general structural performance, and in the case of Q355B, the steel is higher strength with better mechanical properties and more suitable for heavy duty structure and engineering.

    Mechanical Properties (Yield Strength & Tensile Strength)

    Q235B Carbon Steel Plate

    Yield Strength: ≥ 235 MPa

    Tensile Strength: 370 – 500 MPa

    Q355B Carbon Steel Plate

    Yield Strength: ≥ 355 MPa

    Tensile Strength: 470 – 630 MPa

    Steel Plate Gauge Table

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    Gauge Thickness Comparison Table
    Gauge Mild Aluminum Galvanized Stainless
    Gauge 3 6.08mm 5.83mm   6.35mm
    Gauge 4 5.7mm 5.19mm   5.95mm
    Gauge 5 5.32mm 4.62mm   5.55mm
    Gauge 6 4.94mm 4.11mm   5.16mm
    Gauge 7 4.56mm 3.67mm   4.76mm
    Gauge 8 4.18mm 3.26mm 4.27mm 4.19mm
    Gauge 9 3.8mm 2.91mm 3.89mm 3.97mm
    Gauge 10 3.42mm 2.59mm 3.51mm 3.57mm
    Gauge 11 3.04mm 2.3mm 3.13mm 3.18mm
    Gauge 12 2.66mm 2.05mm 2.75mm 2.78mm
    Gauge 13 2.28mm 1.83mm 2.37mm 2.38mm
    Gauge 14 1.9mm 1.63mm 1.99mm 1.98mm
    Gauge 15 1.71mm 1.45mm 1.8mm 1.78mm
    Gauge 16 1.52mm 1.29mm 1.61mm 1.59mm
    Gauge 17 1.36mm 1.15mm 1.46mm 1.43mm
    Gauge 18 1.21mm 1.02mm 1.31mm 1.27mm
    Gauge 19 1.06mm 0.91mm 1.16mm 1.11mm
    Gauge 20 0.91mm 0.81mm 1.00mm 0.95mm
    Gauge 21 0.83mm 0.72mm 0.93mm 0.87mm
    Gauge 22 0.76mm 0.64mm 085mm 0.79mm
    Gauge 23 0.68mm 0.57mm 0.78mm 1.48mm
    Gauge 24 0.6mm 0.51mm 0.70mm 0.64mm
    Gauge 25 0.53mm 0.45mm 0.63mm 0.56mm
    Gauge 26 0.46mm 0.4mm 0.69mm 0.47mm
    Gauge 27 0.41mm 0.36mm 0.51mm 0.44mm
    Gauge 28 0.38mm 0.32mm 0.47mm 0.40mm
    Gauge 29 0.34mm 0.29mm 0.44mm 0.36mm
    Gauge 30 0.30mm 0.25mm 0.40mm 0.32mm
    Gauge 31 0.26mm 0.23mm 0.36mm 0.28mm
    Gauge 32 0.24mm 0.20mm 0.34mm 0.26mm
    Gauge 33 0.22mm 0.18mm   0.24mm
    Gauge 34 0.20mm 0.16mm   0.22mm

     

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    Product Of Advantages

    Main Features of Q235B / Q355B Carbon Steel Plate

    Processing Properties:
    Good machinability, low hardness, and excellent ductility, making the plates easy to cut, bend, and weld.

    Mechanical Properties:
    Hot rolling improves internal structure, enhancing density and overall strength while reducing defects such as cracks and porosity.

    Surface Quality:
    Hot-rolled surfaces may have oxide scale and lower smoothness, which can be improved by surface treatments if required.

    Strength and Toughness:
    Q235B offers good ductility with moderate strength, while Q355B provides higher strength and better load-bearing performance with good toughness.

    Thickness Range:
    Available in medium to heavy thicknesses, suitable for structural and load-bearing applications.

    Applications:
    Widely used in construction, bridges, machinery manufacturing, shipbuilding, pressure vessels, and other structural engineering projects.

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    Main Application

    application

     is a steel with iron as the main element and carbon content between 0.12% and 2.0%. It mainly has low carbon steel plate, medium carbon steel plate, high carbon steel plate and alloy steel plate and other different varieties. Due to its excellent properties, carbon steel plates have been widely used in industrial and civil fields.

    Note:
    1.Free sampling, 100% after-sales quality assurance, Support any payment method;
    2.All other specifications of round carbon steel pipes are available according to your requirement (OEM&ODM)! Factory price you will get from ROYAL GROUP.

    Process of production

    High hardness: carbon steel plate due to its high carbon content, so its hardness is much higher than ordinary steel;

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    Product Inspection

    sheet (1)
    sheet (209)
    QQ图片20210325164102
    QQ图片20210325164050

    Product Characteristics

    Properties and Transportation Information of Carbon Steel Plates

    High Strength: The tensile strength of carbon steel sheets is generally higher than that of Inconel 625 alloy, making them ideal for industrial and engineering applications.

    Weight and Transportation: Steel plates are heavy and require proper loading and transport using heavy-duty vehicles.

    Packaging: During transportation, using protective materials such as covers, wrapping paper, or padding can reduce the risk of surface damage, rust, or moisture.

    Route Selection: Choose safe and stable routes, avoiding narrow roads and mountain roads to reduce transportation risks.

    Time Management: Plan transportation schedules reasonably and in advance to meet customer delivery needs and avoid peak traffic periods.

    Safety Measures: To ensure safe transportation, vehicle inspections should be conducted, goods should be securely fastened, and road safety regulations should be followed.

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    STEEL PLATE (2)

    Transportation: Express (Sample Delivery), Air, Rail, Land, Sea shipping (FCL or LCL or Bulk)

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    FAQ

    Q1: What is the difference between Q235B and Q355B steel plates?
    A: Generally speaking, Q235B is a medium-strength general-purpose structural steel, while Q355B has higher yield strength and tensile strength, making it suitable for heavier load-bearing applications.

    Q2: What are the main application areas for Q235B and Q355B steel plates?
    A: They are commonly used in structural and engineering fields such as construction, bridges, machinery manufacturing, shipbuilding, and pressure vessels.

    Q3: Are Q235B and Q355B steel plates easy to weld? Can I weld them?
    A: Yes, both types of steel plates can be welded, and in most cases, conventional welding processes are used without preheating or post-heat treatment.

    Q4: What thickness information is available for medium-thick carbon steel plates?
    A: The thickness of medium-thick steel plates typically ranges from a few millimeters to thick plates, depending on project requirements.

    Q5: What surface treatments are available?
    A: Anti-corrosion treatments typically include black (rolled surface), pickling, sandblasting, and painting/coating.

    Q6: Do you provide Material Inspection Reports (MTC)?
    A: Yes, we provide Material Inspection Reports (MTC) and other quality documents to ensure material traceability and compliance with standards.

    Q7: Can you provide custom sizes and packaging? What about cutting services? What about delivery dates?
    A: Yes, we offer custom thickness, width, length, and cutting services. Request a quote for custom products now.

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