High-Quality Hot-Rolled Steel Coil Supplier

FAQs

• Q: What international standards do your products comply with?

  Our full product range is ISO 9001-certified and adheres to EU CE directives. Key certifications include: 
  - Structural steel: ISO 4996:2014 EN  
  - Galvanized steel: ASTM A653 / EN 10346  
  - Tinplate: FDA 21 CFR 175.300 food-grade compliance  
  - Custom products: Support 20+ global standards (JIS, GB, DIN, etc.) 
  

• Q: What are the tensile/yield strength or hardness values of the products?

  A: Properties vary by process (e.g., cold-hardened coils: 1,200 MPa tensile strength;  Zn-Fe alloy coatings: 150–220 HV hardness).  Detailed data are available in technical specifications or upon request.

• Q: Can you provide custom dimensions or coatings?

  Absolutely. We offer Deep Customization Services: 
  - Dimensions: Width 200–2,000 mm, Thickness 0.3–25 mm  
  - Coatings: Precision-controlled zinc (20–275 g/m²) or tin (1.1–11.2 g/m²) layers  
  - Surface finishes: 10+ options (matt, mirror, embossed, etc.)  
  - Feasibility report delivered within 48 hours for custom requests
  

• Q: How is corrosion/wear resistance ensured?

  A: Corrosion resistance is enhanced through alloy design (e.g., Zn-Ni, Fe-Zn layers), porosity control (<8 pores/cm²), and post-treatment (e.g., hydrogen baking, passivation), with salt spray performance 3–4x better than standard coatings.

• Q: Which industries are these products suitable for? 
  Can you provide industry-specific solutions?

  A: They are widely used in automotive (body parts, wheel rims), appliances (HVAC, refrigerators), packaging (food cans, aerosol containers), and industrial equipment (racking, agricultural tools).  We optimize coatings for industry-specific needs.

• Q: How do you ensure product defect detection and consistency?

  A: Full-process quality control includes eddy-current testing (>0.1 mm crack detection), thickness gauging, and salt spray testing.  Each coil is supplied with a Material Test Certificate (MTC) and inspection report.

• Q: Conventional specification range?

  A: Thickness: 1.5mm to 20mm (adjustable according to the production line)
  Width: 600mm - 2200mm (minimum/maximum dimensions must be marked)
  Inner diameter: Φ610mm (common) or Φ508mm (please confirm the company's production line)
  Outer diameter: Determined by the roll weight, usually ≤2500mm

• Q: Are the production processes environmentally friendly? 
  Can coatings be recycled?

  A: We use chromium-free passivation, halogen-free treatments, and other eco-friendly processes (compliant with RoHS, ELV).  Coatings are 100% recyclable via electrolytic stripping (e.g., tinplate detinning).

• Q: How long is the shelf life of the product?

  A: Under normal storage conditions (dry, well-ventilated and non-corrosive environment), the shelf life is 12 months (from the date of manufacture).

• Q: Could you provide technical guidance?

  A: We can provide processing suggestions for hot-rolled steel coils (such as cutting and welding techniques), application scenario solutions, or arrange on-site technical support from engineers (advance appointment required).