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1mm 3mm 6mm 10mm 20mm Astm A36 Q235 Q345 Ss400 Mild Carbon Steel Plate
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Detail
Mild carbon steel plate, often referred to as low-carbon steel plate or MS (mild steel) plate, is a versatile and widely used structural steel product. Characterized by its low carbon content (typically 0.05% - 0.25%), it offers excellent weldability, formability, and machinability, making it a preferred choice across multiple industries for applications requiring reliable structural performance without extreme high-strength demands.

2. Core Specifications

2.1 Dimensions (Customizable for Specific Needs)

Dimension TypeRangeNotes
Thickness0.35 mm - 600 mmCommon industrial thicknesses: 1 mm, 2 mm, 3 mm, 5 mm, 8 mm, 10 mm - 50 mm
Width610 mm - 4200 mmStandard widths: 1220 mm, 1500 mm, 2000 mm; wider widths available via special order
Length1200 mm - 18,000 mmCustom cut-to-length services provided (minimum length: 500 mm)

2.2 Material Grades & Corresponding Standards

Different grades comply with international standards to meet diverse regional and industrial requirements:

GradeApplicable StandardKey Application Scenario
S235JR/J0/J2EN 10025-2 (European Standard)Building structures, machinery frames, storage tanks
A36 / A283 Gr B/CASTM A36 / ASTM A283 (American Standard)Bridge components, construction beams, pressure vessels (low-pressure)
SS400JIS G3101 (Japanese Standard)Automotive parts, steel structures, general fabrication
Q195 / Q235GB/T 700 (Chinese Standard)Residential construction, simple mechanical parts, decorative steel
A573 Gr 58/65/70ASTM A573Low-temperature structural applications (e.g., cold storage, outdoor equipment in cold zones)

3. Material Properties

3.1 Mechanical Properties (Taking S235JR as a Representative Grade)

PropertyParameterTest Standard
Yield Strength (σᵧ)≥235 N/mm²EN 10002-1
Tensile Strength (σᵤ)360 - 510 N/mm²EN 10002-1
Elongation (δ, for L₀=200mm)≥26%EN 10002-1
Charpy V-Notch Impact Energy≥27 J (at room temperature)EN 10045-1

3.2 Chemical Composition (Max Content, by Weight; S235JR Example)

ElementContent (%)Role
Carbon (C)≤0.21Controls strength; low content ensures weldability
Silicon (Si)≤0.50Improves oxidation resistance and strength
Manganese (Mn)≤1.60Enhances tensile strength without reducing ductility
Phosphorus (P)≤0.035Restricted to avoid brittleness (especially at low temperatures)
Sulfur (S)≤0.035Restricted to prevent "hot shortness" during welding/forming
Copper (Cu)≤0.55 (optional)Improves atmospheric corrosion resistance (for outdoor use)

4. Manufacturing & Surface Treatment

4.1 Production Process

  1. Raw Material Melting: Iron ore + scrap steel melted in electric arc furnaces (EAF) or basic oxygen furnaces (BOF).

  2. Refining: Ladle furnace (LF) refining to adjust composition and remove impurities.

  3. Casting: Continuous casting into steel slabs (thickness: 150 mm - 300 mm).

  4. Hot Rolling: Slabs heated and rolled to target thickness (most common for industrial plates).

  5. Cold Rolling (Optional): For thin plates (≤3 mm) requiring high surface smoothness and tight thickness tolerance.

  6. Heat Treatment: As-rolled (standard), normalized (for improved uniformity), or stress-relieved (for post-welding stability).

4.2 Surface Finish Options

  • Hot-Rolled Black Surface: Natural oxide layer (blue/gray); suitable for non-decorative, indoor/outdoor structural parts.

  • Pickled & Oiled (P&O): Oxide layer removed via acid pickling, then coated with anti-rust oil; ideal for subsequent painting/coating.

  • Galvanized (Hot-Dip Galvanized, HDG): Coated with zinc (50-100 μm thickness); provides long-term corrosion resistance (for outdoor use: e.g., fences, outdoor frames).

  • Sandblasted: Surface roughened to improve paint adhesion; used for heavy-duty equipment or marine applications.

5. Application Fields

Mild carbon steel plates are widely used due to their balance of performance and cost:

  • Construction: Building frames, beams, columns, floor slabs, and prefabricated houses.

  • Machinery Manufacturing: Machinery bases, frames, gears (low-load), and hydraulic cylinder sleeves.

  • Automotive: Chassis components, wheel hubs (non-high-stress), and truck bed floors.

  • Storage & Transportation: Fuel tanks, water tanks, cargo containers, and pipeline supports.

  • Infrastructure: Bridge decking (low-traffic), guardrails, and drainage covers.

  • General Fabrication: Shelves, workbenches, decorative steel structures, and agricultural equipment.

6. Quality Assurance & Certifications

  • Mill Test Certificate (MTC): Provided with each shipment, compliant with EN 10204 (Format 3.1: third-party verified; Format 3.2: independent inspection).

  • Quality Inspections: In-line thickness monitoring, ultrasonic testing (UT) for internal defects (optional for critical applications), and visual inspection for surface flaws.

  • Certifications: ISO 9001 (quality management), ISO 14001 (environmental management), and CE marking (for European market compliance).

7. Packaging & Shipping

7.1 Packaging

  • Thick Plates (≥10 mm): Bundled with steel straps, wrapped in waterproof paper + plastic film (for moisture protection), placed on wooden pallets or steel racks.

  • Thin Plates (≤5 mm): Stacked in cartons or wooden crates, with interlayer paper to prevent surface scratching.

  • Custom Packaging: Available for ocean shipping (anti-corrosion, anti-impact) or air freight (lightweight packaging).

7.2 Shipping Terms

  • Incoterms Options: EXW (Ex Works), FOB (Free On Board), CIF (Cost, Insurance, Freight), DAP (Delivered at Place).

  • Lead Time: 7 - 15 working days for standard grades/sizes; 20 - 30 working days for custom grades/dimensions.

8. Technical Support & After-Sales

  • Pre-Sales: Provide material selection advice based on application (e.g., low-temperature impact requirements, corrosion environment).

  • In-Sales: Real-time production tracking and inspection report sharing.

  • After-Sales: Assist with welding parameters, forming guidelines, and handle quality complaints (response within 24 hours).