Detailed Explanation of 400 Series Stainless Steel Processing Methods and Applications
1. Cold Rolling
Characteristics: Hot-rolled coils are pickled and then rolled below the recrystallization temperature. Products have a smooth surface, precise dimensions, and high strength.
Common Grades: 430, 439, 443, 444, 434, 410, 420, etc., mainly used to produce thinner plates, strips, and coils (e.g., 0.3mm-3.0mm).
Typical Cold-Rolled Products and Applications:
2B/BA Coils: Used for appliance panels (washing machines, microwave ovens), elevator decorations, kitchen utensils, and tableware.
Precision Strips: Used for electronic components, automotive fuel lines, razor blades, and surgical instruments.
Surface Finished Sheets (Brushed, Titanium-Plated): Used for architectural decoration and appliance housings.
2. Hot Rolling
Characteristics: Rolled at high temperatures. Products have an oxide layer or are pickled (HRAP) on the surface, are thicker, and have lower costs. Commonly Used Grades: All 400 series grades, with common thicknesses ranging from 3mm to tens of millimeters.
Typical Hot-Rolled Products and Applications:
Hot-Rolled Pickled Plate (HRAP): Used in automotive exhaust systems (mufflers, manifolds), containers, chemical storage tanks, and heat exchangers.
Hot-Rolled Black Skin/No.1 Plate: Used as raw material for cold rolling, or directly for non-exposed building structures and boiler components.
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