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Corrosion-Resistant 439 Grade Stainless Steel Plate Excellent Formability & Weldability
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xProductdetails
| producten | Roestvrij stalen plaat | Cijfer | 439 |
|---|---|---|---|
| Dikte | 0,5 - 10,0 | Technisch | Koud gerold |
| Breedte | 1219mm | Oppervlak | 2B 2D NR.1 |
| Standaard | ASTM GB JIS ENGELS DIN | MOQ | 1 ton |
Productomschrijving
Corrosion-Resistant 439 Grade Stainless Steel Plate Excellent Formability & Weldability
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 |
Corrosion-Resistant 439 Grade Stainless Steel Plate – Excellent Formability & Weldability for Demanding Applications
Product Introduction
Grade 439 stainless steel plate is a titanium-stabilized, ferritic stainless steel engineered for superior corrosion resistance, excellent formability, and reliable weldability—making it an ideal solution for automotive exhaust systems, heat exchangers, appliance components, and other high-performance industrial applications. With a chromium content of 17–19% and ultra-low carbon and nitrogen levels, Grade 439 delivers enhanced resistance to oxidation and intergranular corrosion, even after welding or prolonged exposure to elevated temperatures.
Available in thicknesses from 0.8 mm to 10.0 mm, this material combines the cost-efficiency of ferritic stainless steels with performance characteristics that rival more expensive austenitic grades—offering engineers and manufacturers a smart, sustainable material choice without compromising on durability or manufacturability.
Why Grade 439 Stands Out
✅ Superior Corrosion Resistance
- Resists rust, pitting, and crevice corrosion in chloride-containing environments (e.g., road salt).
- Forms a stable, self-healing chromium oxide layer for long-term protection.
- Ideal for components exposed to acidic condensates in exhaust systems (e.g., sulfuric and nitric acids).
✅ Excellent Formability
- High elongation (>25%) and low yield-to-tensile ratio enable deep drawing, bending, and stamping.
- Suitable for complex geometries in mufflers, catalytic converter shells, and manifolds.
✅ Outstanding Weldability
- Titanium stabilization prevents chromium carbide precipitation during welding.
- Eliminates the need for post-weld annealing in most applications.
- Compatible with common welding methods: TIG, MIG, resistance spot welding, and laser welding.
✅ High-Temperature Performance
- Continuous service up to 800°C (1472°F).
- Resists scaling and maintains structural integrity under thermal cycling.
Technical Specifications
| Parameter | Details |
|---|---|
| Grade Designation | UNS S43035 / ASTM A240 Type 439 / EN 1.4510 / JIS SUS 439 |
| Material Type | Ferritic, Titanium-Stabilized Stainless Steel |
| Thickness Range | 0.8 mm – 10.0 mm |
| Width Options | 600 mm – 2000 mm (custom widths available) |
| Length / Coil Form | Cut-to-length sheets or mill coils |
| Surface Finishes | 2B (standard), BA (Bright Annealed), No.1, Hairline, or custom finishes |
| Standards Compliance | ASTM A240/A240M, EN 10088-2, JIS G4305, GB/T 4237 |
| Certifications | ISO 9001, IATF 16949, RoHS compliant; Mill Test Reports (MTRs) provided |
Chemical Composition (Typical, Weight %)
| Element | C | Si | Mn | P | S | Cr | Ni | N | Ti |
|---|---|---|---|---|---|---|---|---|---|
| Max | ≤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: The precise Ti/C+N ratio ensures optimal stabilization, preventing sensitization during fabrication.
Mechanical Properties (Annealed Condition)
| Property | Typical Value |
|---|---|
| Tensile Strength | 450 – 600 MPa |
| Yield Strength (0.2% offset) | ≥280 MPa |
| Elongation (in 50 mm) | ≥25% |
| Hardness (HRB) | ≤88 |
| Density | 7.70 g/cm³ |
| Thermal Conductivity | ～26 W/m·K (at 100°C) |
| Coefficient of Thermal Expansion | 10.4 × 10⁻⁶ /°C (20–100°C) |
These properties support high-speed stamping, roll forming, and robotic welding in automated production lines.
Key Applications
- Automotive Exhaust Systems: Manifolds, catalytic converters, mufflers, tailpipes
- Household Appliances: Oven liners, dishwasher components, washing machine drums
- Industrial Equipment: Heat exchangers, burner parts, flue ducts
- Architectural Trim: Where moderate corrosion resistance and aesthetic finish are required
Grade 439 is especially favored in emission-critical automotive applications, where material failure is not an option.
Comparison with Common Stainless Grades
| Feature | Grade 439 | Grade 409 | Grade 430 | Grade 304 |
|---|---|---|---|---|
| Chromium (%) | 17–19 | 10.5–11.75 | 16–18 | 18–20 |
| Stabilized? | Yes (Ti) | Yes (Ti) | No | No (unless 321/347) |
| Max Use Temp (°C) | ～800 | ～650 | ～700 | ～870 |
| Intergranular Corrosion Resistance | Excellent | Good | Poor (after welding) | Excellent |
| Formability | Excellent | Good | Moderate | Excellent |
| Cost Efficiency | High | Very High | High | Low |
Grade 439 outperforms 409 and 430 in high-temperature corrosion resistance while remaining significantly more economical than 304.
Quality Assurance & Traceability
Every batch of Grade 439 plate undergoes:
- Spectrometric chemical analysis
- Tensile and hardness testing
- Surface inspection (automated optical scanning)
- Dimensional verification (laser micrometers for thickness tolerance ±0.02 mm)
Full Mill Test Reports (MTRs) per EN 10204 3.1 are provided. Our production facilities are IATF 16949 certified, ensuring compliance with global automotive quality standards.
Sustainability & Recyclability
- Contains ≥60% recycled content
- Fully recyclable at end-of-life with no loss of properties
- Supports lightweight design (thin gauges reduce vehicle weight → lower emissions)
- Long service life reduces maintenance and replacement frequency
Packaging & Delivery
- Sheets: Bundled with protective paper, strapped, and palletized
- Coils: VCI-wrapped, waterproof packaging, wooden pallets
- Export-ready for sea, air, or land transport
- Lead time: 7–15 days from stock; 30–45 days for custom orders
Why Partner With Us?
- Global Supply Network: Reliable delivery to North America, Europe, Asia, and beyond
- Technical Expertise: Material selection, prototyping, and process optimization support
- Custom Capabilities: Slitting, blanking, laser cutting, and surface finishing services
- Competitive Pricing: Direct mill relationships ensure cost efficiency without quality compromise
Conclusion
Grade 439 stainless steel plate offers an unmatched combination of corrosion resistance, formability, and weldability in a cost-effective ferritic platform. Whether you're designing next-generation exhaust systems or durable industrial components, Grade 439 delivers the reliability and performance your application demands.
Request a sample, technical datasheet, or custom quote today—and experience the difference of precision-engineered stainless steel.
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