430 Ferritic Stainless Steel Coil Cold Rolled 2B BA 0.3mm-3mm Magnetic 16Cr

Our 430 (UNS S43000) ferritic stainless steel coil offers an economical alternative to austenitic grades for applications requiring moderate corrosion resistance and good formability without the cost premium of nickel-containing alloys. With 16-18% chromium and effectively zero nickel, 430 relies on its BCC ferritic crystal structure for mechanical properties rather than expensive nickel alloying. This makes 430 magnetic, a property required for induction applications or advantageous for magnetic fixturing during fabrication. The absence of nickel provides substantial price stability, as 430 pricing closely tracks chromium and iron markets rather than the highly volatile nickel market. Our 430 coils are produced through EAF melting, AOD refining, continuous casting, hot rolling with controlled finishing temperature, annealing and pickling, and final cold rolling with batch or continuous annealing. The 2B finish provides the standard smooth gray-white appearance, while BA (Bright Annealed) offers elevated reflectivity. 430 coils find extensive use in domestic appliances (washing machine drums, dishwasher interiors, refrigerator panels), automotive trim and exhaust components, architectural interior cladding, kitchen equipment, and general fabrication where the corrosion resistance requirements do not mandate an austenitic grade.

• Excellent Cost-Performance Ratio: By eliminating nickel (which comprises 8-12% of 304), 430 provides 60-70% of the corrosion resistance of 304 at approximately 50-60% of material cost. For indoor applications with limited chemical exposure, 430 delivers required service life at substantially reduced material cost, particularly compelling in consumer appliance manufacturing where thin gauge coils must meet performance specifications within tight cost targets.
• Magnetic Properties for Induction Applications: The ferritic microstructure is inherently ferromagnetic with saturation induction of approximately 1.6 Tesla. This enables electromagnetic holding during stamping and forming operations (eliminating mechanical clamping), induction heating for cooking appliances (induction-compatible cookware), and magnetic attachment systems for decorative panels and signage. The stable magnetic properties are unaffected by cold working or thermal processing.
• Good Formability for Moderate Drawing: While 430 has lower elongation (min 22%) and higher work hardening rate than 304, it possesses sufficient ductility for moderate forming including bending, roll forming, shallow drawing, and stretch forming. The plastic strain ratio (r-value) is typically higher than austenitic grades, advantageous in deep drawing where material flows preferentially in the sheet plane rather than thinning. Proper lubrication and optimized tooling clearances accommodate 430's higher strength.
• Thermal Fatigue Resistance: The lower coefficient of thermal expansion of 430 (10.4um/m/C) compared to 304 (17.2um/m/C) provides superior thermal fatigue resistance in applications involving cyclic temperature changes. This property is exploited in automotive exhaust system components where reduced thermal expansion minimizes distortion, cracking, and gasket joint failure during repeated heating and cooling cycles.
• Improved Thermal Conductivity: At 26.1 W/mK, 430's thermal conductivity is approximately 60% higher than 304 (16.2 W/mK), providing more efficient heat transfer in heat exchanger plates, oven liners, and cooking surfaces. Higher conductivity results in faster heating response, improved temperature uniformity, and reduced hot spots. For induction cookware, the combination of magnetic compatibility and higher conductivity makes 430 the preferred grade.
• Excellent Polishing Response: 430 exhibits superior bright polishing characteristics compared to most austenitic grades, achieving high reflectivity with less polishing effort. The fine grain structure achievable through controlled annealing produces a uniform highly reflective surface when processed through BA finishing or subsequent mechanical polishing. This has established 430 as the dominant grade for architectural interior decorative panels and retail display fixtures.
• Stable Microstructure Without Phase Transformation: Unlike 304 which can undergo strain-induced martensite formation during cold working (producing unexpected magnetism and hardening), 430 maintains its fully ferritic microstructure throughout its deformation range. This structural stability ensures predictable forming behavior, consistent magnetic properties, and uniform corrosion resistance regardless of cold work degree, also simplifying FEA simulations of forming processes.

430 ferritic stainless steel coils serve applications where moderate corrosion resistance, magnetic properties, and cost-effectiveness are primary drivers. Primary sectors include domestic appliances (washing machine outer drums and tubs, dishwasher inner cabinets, refrigerator door panels and liners, microwave oven cavities, range hood bodies), automotive components (exhaust system tubing and muffler shells, decorative trim strips, wheel covers, fuel filler doors, heat shields), architectural interior applications (elevator cabin panels, escalator skirt panels, column covers, suspended ceiling panels, decorative wall cladding), kitchen equipment (commercial kitchen work tables, exhaust hood canopies, induction-compatible cookware), electrical and electronic applications (battery casings, transformer core laminations, magnetic shielding enclosures), and general sheet metal fabrication where economy is prioritized over ultimate corrosion resistance.

430 coils are packaged with acid-free interleaving paper, VCI anti-corrosion paper, waterproof polyethylene film, and steel strapping in circumferential and radial orientations. Edge protection rings maintain coil geometry. Coils are palletized on ISPM 15 certified wooden skids. Container stowage includes timber blocking and lashing chains. Each coil carries a weather-resistant tag with complete traceability. Standard EN 10204 Type 3.1 certification accompanies every shipment, with Type 3.2 available on request.