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439 Ferritic Stainless Steel Sheet 4FT*8FT for High-Temperature Applications
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x商品の詳細
| 製品 | ステンレス鋼板 | 学年 | 439 |
|---|---|---|---|
| 厚さ | 0.5～10.0 | 技術 | コールドロール |
| 幅 | 1219mm | 表面 | 2B 2D NO.1 |
| 標準 | ASTM GB JIS EN DIN | MOQ | 1トン |
製品の説明
439 Ferritic Stainless Steel Sheet 4FT*8FT for High-Temperature Applications
Stainless Steel Plate Specifications
| Name | 439 stainless steel Plate |
| Our Grade |
200 Series: 201 202 300 Series: 301 304,304L,304H,309S,310S,314,316L,316Ti,316H,316LN,317L,321,329,347 400 Series: 409L,410,410S,415,416,420,430,431,436L.439,441,443,444,445,446 Super Stainless Steel: 904L,926,254SMO,654SMO,15-5PH,17-4PH,17-7PH.etc Nickel Alloy: C276, C22,G35,Alloy X,Monel 400,K500,Inconel 600,601,617,625,718,Incoloy 800,800H,800HT,825.etc |
| Technique | Hot Rolled, Cold Rolled,Forged |
| Standard | JIS, AISI, ASTM, DIN, TUV, BV, SUS, etc |
| Thickness | 0.1 – 80.0mm |
| Width range | 10mm – 2000mm |
| Length | Customized |
| Finish | 2B,2D,NO.1, BA, No.4, 8k, Brushed,Hairline,PVD Coating,Sandblasted |
| Service | Laser Cutting, Bending |
| Sample | Available |
439 Ferritic Stainless Steel Sheet – 4FT × 8FT for High-Temperature Applications
Product Overview
Grade 439 ferritic stainless steel sheet in standard 4 feet by 8 feet (1219 mm × 2438 mm) dimensions is engineered specifically for demanding high-temperature environments, including automotive exhaust systems, industrial heat exchangers, burner components, and flue ducts. As a titanium-stabilized ferritic stainless steel, Grade 439 delivers exceptional resistance to oxidation, thermal fatigue, and intergranular corrosion—making it a reliable, cost-effective alternative to more expensive austenitic grades like 304 or 321.
Available in thicknesses from 0.8 mm to 10.0 mm, the 4FT × 8FT sheet size offers optimal material utilization for fabrication shops, OEMs, and Tier suppliers seeking standardized, easy-to-handle panels with minimal waste.
Why Choose 4FT × 8FT Grade 439 Sheets?
The 4'×8' format is the industry-preferred sheet size in North America and widely adopted globally due to:
- Compatibility with standard CNC cutting, laser, and plasma tables
- Efficient nesting for stamping and blanking operations
- Reduced handling vs. coil processing for medium-volume production
- Simplified storage and logistics
When combined with Grade 439’s inherent high-temperature performance, this sheet size becomes ideal for prototyping, batch manufacturing, and replacement part fabrication.
Key Advantages for High-Temperature Use
✅ Oxidation Resistance up to 800°C (1472°F)
Grade 439 forms a stable chromium-rich oxide layer that resists scaling and degradation during prolonged exposure to hot exhaust gases or combustion atmospheres.
Grade 439 forms a stable chromium-rich oxide layer that resists scaling and degradation during prolonged exposure to hot exhaust gases or combustion atmospheres.
✅ Titanium Stabilization
Ti binds carbon and nitrogen, preventing chromium carbide precipitation during welding or service at 500–800°C—eliminating sensitization and ensuring long-term corrosion resistance.
Ti binds carbon and nitrogen, preventing chromium carbide precipitation during welding or service at 500–800°C—eliminating sensitization and ensuring long-term corrosion resistance.
✅ Low Thermal Expansion
Ferritic structure provides ～30% lower coefficient of thermal expansion than austenitic steels, reducing distortion and joint stress during thermal cycling.
Ferritic structure provides ～30% lower coefficient of thermal expansion than austenitic steels, reducing distortion and joint stress during thermal cycling.
✅ Good Thermal Conductivity
Enhances heat dissipation in manifolds and heat shields, improving system efficiency and component life.
Enhances heat dissipation in manifolds and heat shields, improving system efficiency and component life.
✅ Excellent Fabricability
Despite its high-temperature strength, Grade 439 maintains good cold-forming characteristics—suitable for bending, rolling, and deep drawing of complex exhaust geometries.
Despite its high-temperature strength, Grade 439 maintains good cold-forming characteristics—suitable for bending, rolling, and deep drawing of complex exhaust geometries.
Technical Specifications
| Property | Details |
|---|---|
| Grade | UNS S43035 / ASTM A240 Type 439 / EN 1.4510 / JIS SUS 439 |
| Dimensions | 4 ft × 8 ft (1219 mm × 2438 mm) – standard; custom sizes available |
| Thickness Range | 0.8 mm – 10.0 mm (common automotive gauges: 1.2 mm, 1.5 mm, 2.0 mm) |
| Surface Finish | 2B (standard), BA (Bright Annealed), No.1, or Hairline |
| Delivery Condition | Annealed and Pickled |
| Standards | ASTM A240/A240M, EN 10088-2, JIS G4305 |
| Certifications | ISO 9001, IATF 16949, RoHS compliant; Mill Test Reports (MTRs) included |
Chemical Composition (Typical, wt%)
| Element | C | Si | Mn | P | S | Cr | Ni | N | Ti |
|---|---|---|---|---|---|---|---|---|---|
| Max/Range | ≤0.03 | ≤1.0 | ≤1.0 | ≤0.04 | ≤0.03 | 17.0–19.0 | ≤0.5 | ≤0.04 | ≥0.2 + 4×(C+N); ≤1.10 |
Note: Precise Ti control ensures optimal stabilization without excessive grain coarsening.
Mechanical & Physical Properties (Annealed)
| Property | Value |
|---|---|
| Tensile Strength | 450–600 MPa |
| Yield Strength (0.2% offset) | ≥280 MPa |
| Elongation | ≥25% (in 50 mm) |
| Hardness (HRB) | ≤88 |
| Density | 7.70 g/cm³ |
| Thermal Conductivity (100°C) | ～26 W/m·K |
| Coefficient of Thermal Expansion (20–100°C) | 10.4 × 10⁻⁶ /°C |
| Max Continuous Service Temp | 800°C (1472°F) |
Common High-Temperature Applications
- Automotive Exhaust Manifolds – Resists thermal shock and oxidation
- Catalytic Converter Housings – Maintains integrity under cyclic heating
- Mufflers & Resonators – Combats internal acid condensation and external road salt
- Industrial Burner Tubes & Flues – Withstands combustion byproducts
- Heat Shields & Exhaust Wraps – Reflects and dissipates radiant heat
- Agricultural & Construction Equipment Exhausts – Durable in harsh operating conditions
Comparison: Grade 439 vs. Alternatives
| Feature | 439 | 409 | 430 | 304 |
|---|---|---|---|---|
| Max Use Temp (°C) | 800 | 650 | 700 | 870 |
| Stabilized? | Yes (Ti) | Yes (Ti) | No | No (unless 321) |
| Weldability (as-welded) | Excellent | Good | Poor | Excellent |
| Corrosion Resistance | Very Good | Moderate | Good | Excellent |
| Cost | Low–Medium | Low | Low | High |
| Thermal Expansion | Low | Low | Low | High |
Grade 439 offers the best balance for applications requiring >650°C performance without the premium cost of 300-series alloys.
Quality Assurance
Each 4FT × 8FT sheet is:
- Produced via AOD refining for ultra-low interstitial content
- Ultrasonically tested (optional for critical uses)
- Inspected for surface defects (scratches, pits, roll marks)
- Supplied with full EN 10204 3.1 Mill Test Report
- Traceable from melt to shipment
Our facility holds IATF 16949 certification, ensuring compliance with automotive quality management systems.
Packaging & Handling
- Sheets separated by anti-scratch paper
- Bundled with steel strapping on wooden export pallets
- Edges protected with corner guards
- Waterproof wrapping for ocean freight
- Marked with grade, heat number, dimensions, and standards
Sustainability Benefits
- 100% recyclable with no downgrading
- Enables lightweight design (thin gauges reduce system weight)
- Long service life = fewer replacements = lower environmental impact
- Supports OEM sustainability and circular economy goals
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