400 Series Stainless Steel Coil

400 Series Stainless Steel Coils are ferritic and martensitic stainless steels characterized by high strength, excellent corrosion resistance in mild environments, and magnetic properties. These coils are ideal for applications requiring formability, moderate corrosion resistance, and cost efficiency—such as in automotive, appliances, construction, and kitchenware.

Highlighted Features

• Magnetic & heat-resistant ferritic/martensitic steel
• Excellent formability and oxidation resistance
• Ideal for automotive exhaust, panels, kitchen equipment
• Lower cost than 300 series stainless steel
• Available in slit coil, mill edge, and custom widths

Grade	Type	Cr (%)	C (%)	Ni (%)	Yield Strength (MPa)	Hardness (HB)
409	Ferritic	10.5–11.75	≤0.08	≤0.5	170–310	≤200
410	Martensitic	11.5–13.5	≤0.15	≤0.75	275–450	≤210
430	Ferritic	16.0–18.0	≤0.12	≤0.75	205–310	≤183
420	Martensitic	12.0–14.0	≤0.15	≤0.75	350–550	≤240
441/444	Ferritic (Low C)	17.5–19.5	≤0.02	≤1.0	250–400	≤200

Available Sizes

Width (mm)	Thickness (mm)	Coil Weight (MT)
600–1500	0.3–6.0	3–20 MT

Application

• Automobile exhaust systems
• Refrigerator liners and kitchen sinks
• Decorative trims and panels
• Heat exchangers and tubing
• Oil and gas industry parts

Packaging & Delivery

• Waterproof paper + PVC wrap + steel strap reinforcement
• Wooden pallets or steel frames for seaworthy packing
• Containerized or bulk shipping options
• Average lead time: 7–15 days

Why Choose SUNNING STEEL?

✔ Full grade coverage: 409, 410, 420, 430, 441, 444

✔ ISO 9001 Certified, SGS/BV approved

✔ Custom slitting & surface processing

✔ Fast delivery & global export experience

✔ Responsive sales and technical support