Technical & Material Properties

• Chemical Composition (example: ASTM A36): C ≤ 0.26%, Mn 0.60–0.90%, Si ≤ 0.40%, P ≤ 0.04%, S ≤ 0.05%.

• Grades: Q235, Q345, S355JR, A572 Gr.50, A36, S235, S355, 4130, 4140, 4340, A106 Gr.A/B, A333, A500, St52, AH36, 1020, 1018, 1010, S275JR, A53, 1045, SS400, etc.

• Thickness Range: 3–200 mm; Width: 1000–3500 mm; Length: up to 12,000 mm.

• Density: 7.85 g/cm³; Weight Calculation Formula: Weight (kg) = Length (m) × Width (m) × Thickness (mm) × 7.85.

• Mechanical Properties:

  • Tensile strength: 400–550 MPa

  • Yield strength: 235–345 MPa

  • Elongation: 20–26%

  • Impact toughness (Charpy V-notch at 20°C): ≥ 27 J

• Surface Conditions: As-rolled, shot-blasted, pickled, or coated with anti-rust oil.

  
  

Applications & Advantages

• Applications: Bridges, high-rise buildings, ship hulls, pressure vessels, industrial frames, heavy machinery bases.

• Advantages:

  • High load-bearing capacity suitable for structural engineering

  • Cost-effective compared to alloy steels

  • Excellent machinability and weldability with standard welding methods (SMAW, GMAW, SAW)

  • Can be cut by oxy-fuel, plasma, or laser cutting methods

  • Adaptable to galvanizing, painting, and surface coating for enhanced durability

• Typical Use Case: A Q345B plate of 40 mm thickness is commonly used in bridge deck fabrication, offering both strength and fatigue resistance.

Manufacturing Process & Standards

• Process Flow:

  1. Steelmaking (BOF/EAF) → Ladle refining → Continuous casting into slabs

  2. Reheating and hot rolling to required thickness

  3. Cooling on run-out table

  4. Cutting to ordered dimensions

  5. Surface treatment and final inspection

• Quality Control: Ultrasonic testing (UT) for internal defects, dimensional tolerance inspection, mechanical property testing per batch.

• Standards: ASTM A36/A572, EN 10025-2, GB/T 700, ISO 9001.

• Packaging & Transport: Bundled with steel straps, edge-protected, loaded on steel pallets, covered with waterproof tarpaulin for sea freight.

Production Process

Product Real Shot

FAQ

Q1: What product information must I provide before making a purchase?
A: Please provide the grade, width, thickness, surface treatment requirements, and the quantities you need.

Q2: What about product pricing information?
A: Prices may vary due to fluctuations in raw material costs.

Q3: Is it possible to send samples?
A: Yes, we offer free samples with express shipping worldwide.

Q4: Do you offer a service for customized products?
A: Yes, we can supply according to your specific requirements.

Q5: Can I visit you in person?
A: Customers from all over the world are welcome to meet with us.

Q6: Can you assist me in importing steel products for the first time?
A: Yes, we can provide support through our experienced shipping agents.