| Grade | UNS | Key Characteristics | Typical Applications |
|---|---|---|---|
| 409 | S40900 | Good oxidation resistance, heat resistance and economical cost | Automotive exhaust systems, exhaust pipes |
| 430 | S43000 | Good corrosion resistance, formability and attractive surface | Kitchenware, appliances, decoration, automotive trim |
| 439 | S43035 | Improved corrosion and oxidation resistance | Automotive exhaust systems, heat exchangers |
| 441 | S44100 | Excellent high-temperature oxidation resistance | Automotive exhaust, heat exchangers |
| 444 | S44400 | High corrosion resistance with molybdenum addition | Water tanks, heat exchangers, chemical equipment |
| Grade | UNS | C Max. | Si Max. | Mn Max. | P Max. | S Max. | Cr % | Mo % | Ti / Nb / Other |
|---|---|---|---|---|---|---|---|---|---|
| 409 | S40900 | 0.08 | 1.00 | 1.00 | 0.045 | 0.045 | 10.5–11.75 | — | Ti stabilized |
| 430 | S43000 | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | 16.0–18.0 | — | — |
| 439 | S43035 | 0.07 | 1.00 | 1.00 | 0.040 | 0.015 | 17.0–19.0 | — | Ti stabilized |
| 441 | S44100 | 0.03 | 1.00 | 1.00 | 0.040 | 0.015 | 17.5–19.5 | — | Ti/Nb stabilized |
| 444 | S44400 | 0.025 | 1.00 | 1.00 | 0.040 | 0.030 | 17.5–19.5 | 1.75–2.50 | Ti/Nb stabilized |
Note: Chemical composition requirements may vary according to the specific ASTM/JIS/EN/GB standard and grade designation. The applicable product standard and purchase specification shall prevail.
| Grade | Tensile Strength Min. | Yield Strength Min. (0.2%) | Elongation Min. | Hardness Max. |
|---|---|---|---|---|
| 409 | ≥380 MPa | ≥170 MPa | ≥20% | HRB ≤88 |
| 430 | ≥450 MPa | ≥205 MPa | ≥22% | HRB ≤89 |
| 439 | ≥415 MPa | ≥205 MPa | ≥22% | HRB ≤90 |
| 441 | ≥415 MPa | ≥205 MPa | ≥22% | HRB ≤90 |
| 444 | ≥415 MPa | ≥275 MPa | ≥20% | HRB ≤96 |
Technical note: Ferritic stainless steel mechanical requirements can differ according to thickness, heat treatment, product form and applicable standard. For commercial quotations and MTCs, the exact ASTM/JIS/EN/GB specification should be confirmed.
| Surface | Description | Typical Applications |
|---|---|---|
| 2B | Smooth cold rolled surface | Appliances, industrial equipment |
| BA | Bright Annealed surface | Automotive, appliances, decorative applications |
| No.1 | Hot rolled, annealed and pickled | Industrial equipment, tanks |
| No.4 | Brushed / satin finish | Kitchen equipment, architecture |
| HL | Hairline finish | Architectural decoration |
| 8K | Mirror polished finish | Decorative panels and architectural applications |
Cold Rolled Ferritic Stainless Steel Coil provides good dimensional accuracy, smooth surface quality and consistent thickness. It is widely used in automotive components, kitchen appliances, decorative panels, household appliances and precision fabrication.
Hot Rolled Ferritic Stainless Steel Coil is suitable for industrial applications requiring heavier gauges, good strength and further fabrication or processing.
Common surface:
No.1 · Annealed & Pickled
Ferritic stainless steel coils offer a combination of:
Good corrosion resistance
Good oxidation resistance
Good thermal resistance
Excellent resistance to stress corrosion cracking
Good formability
Good dimensional stability
Low thermal expansion
Good electrical conductivity
Good resistance to high-temperature oxidation
Cost-effective alternative to some austenitic grades
Ferritic stainless steel generally has a body-centered cubic (BCC) crystal structure and is normally magnetic.
Ferritic stainless steel is extensively used for:
Automotive exhaust systems
Exhaust pipes
Mufflers
Catalytic converter components
Exhaust manifolds
Automotive trim
Heat shields
409, 439 and 441 stainless steel coils are particularly common in automotive exhaust applications.
Kitchen sinks
Cookware
Oven components
Refrigerator components
Washing machines
Dishwasher components
Household appliances
430 stainless steel coil is widely used for these applications.
Decorative panels
Building facades
Interior decoration
Elevator panels
Architectural components
Roofing applications
Heat exchanger components
Heat recovery systems
Industrial heating equipment
Automotive heat exchangers
Chemical equipment
Industrial tanks
Water tanks
Processing equipment
Industrial machinery
High-temperature equipment
| Standard System | Typical Standards / Designations |
|---|---|
| ASTM | ASTM A240 / A240M |
| ASME | ASME SA240 |
| AISI | 409 / 430 / 439 / 441 / 444 |
| UNS | S40900 / S43000 / S43035 / S44100 / S44400 |
| JIS | JIS G4304 / JIS G4305 |
| EN | EN 10088-2 |
| GB/T | GB/T 3280 / GB/T 4237 |
| DIN | Applicable DIN Stainless Steel Standards |
| Product | Common HS Code Reference |
|---|---|
| Ferritic Stainless Steel Coil | HS 7219 |
| Stainless Steel Cold Rolled Coil | HS 7219 |
| Stainless Steel Hot Rolled Coil | HS 7219 |
| Stainless Steel Strip ≤600 mm | HS 7220 |
| Stainless Steel Slit Coil | HS 7220 |
| Stainless Steel Strip Coil | HS 7220 |
Note: The applicable HS Code depends on width, thickness, production process, product form, material and destination country's customs classification.
Ferritic Stainless Steel Coil Manufacturer & Supplier
Baojing Steel supplies high-quality Ferritic Stainless Steel Coils in 409, 430, 439, 441 and 444 grades. Available in cold rolled and hot rolled conditions with 2B, BA, No.1, No.4, HL and customized surface finishes. Ferritic stainless steel coils offer excellent oxidation resistance, corrosion resistance, thermal stability and cost efficiency for automotive, appliances, construction, heat exchangers and industrial applications.
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