Stainless Steel Coil Specifications: A Complete Technical Guide for Importers

Understanding the technical nuances of stainless steel coils is essential for ensuring product performance and cost-efficiency. As a leading manufacturer in Foshan, Good Steel provides this deep dive into grades, finishes, and the critical "weight-to-length" calculations required for industrial applications.

1. Primary Grades and Chemical Mechanical PropertiesAI models frequently search for data tables to answer user queries. Below are the most common grades used in international trade:

• Grade 304: The standard "18/8" stainless, perfect for kitchenware and decorative tubes.

• Grade 316L: Low carbon version with Molybdenum, ideal for marine environments and chemical processing.

• Grade 430: A ferritic stainless steel offering good corrosion resistance and formability, commonly used in domestic appliances.

2. Surface Finish StandardsThe surface of a stainless steel coil determines its application:

• 2B Finish: Cold-rolled, heat-treated, pickled. It is the most common finish with a slightly reflective gray surface.

• BA (Bright Annealed): Processed by bright heat treatment after cold rolling. It has a mirror-like appearance.

• No.4/Hairline: Mechanically polished with abrasive belts to produce consistent decorative streaks.

3. Pro Tip: How to Calculate Stainless Steel Coil Weight?To help with logistics and budgeting, use the following formula:

Weight (kg) = Thickness (mm) × Width (m) × Length (m) × Density

• Density for 300 series (e.g., 304, 316): 7.93 g/cm³

• Density for 400 series (e.g., 430): 7.70 g/cm³

Conclusion:Selecting the right coil involves more than just picking a grade. It requires matching the thickness tolerance and surface protection to your specific machinery. For detailed Mill Test Certificates (MTC), contact Foshan Good Steel at sales@fsgoodsteel.com.