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Precision-Rolled 439 Stainless Steel Sheet Optimized for Heat Resistance and Durability
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xProduct Details
| Products | Stainless Steel Sheet | Grade | 439 |
|---|---|---|---|
| Thickness | 0.5 - 10.0 | Tech | Cold Rolled |
| Width | 1219mm | Surface | 2B 2D NO.1 |
| Standard | ASTM GB JIS EN DIN | MOQ | 1 Ton |
Product Description
Precision-Rolled 439 Stainless Steel Sheet Optimized for Heat Resistance and Durability
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 |
Precision-Rolled 439 Stainless Steel Sheet – Optimized for Heat Resistance and Durability
Product Overview
Precision-rolled Grade 439 stainless steel sheet is a high-performance, titanium-stabilized ferritic stainless steel engineered for applications demanding exceptional heat resistance, long-term durability, and dimensional accuracy. Ideal for automotive exhaust systems, industrial heat exchangers, catalytic converter housings, and thermal shielding, this material combines advanced metallurgy with tight-tolerance cold rolling to deliver consistent mechanical properties and surface quality.
Manufactured to exacting standards in thicknesses from 0.8 mm to 10.0 mm, our precision-rolled 439 sheets feature ±0.02 mm thickness tolerance, uniform grain structure, and minimal surface defects—ensuring optimal performance in high-temperature, high-corrosion environments where reliability is non-negotiable.
Why Precision Rolling Matters
Unlike standard hot-rolled or loosely controlled cold-rolled products, precision-rolled 439 stainless steel undergoes:
- Multi-pass cold reduction with computer-controlled roll gaps
- Continuous annealing in hydrogen-nitrogen atmospheres for softness and cleanliness
- Electrolytic cleaning and pickling for oxide-free surfaces
- In-line laser gauging for real-time thickness monitoring
The result? Sheets with superior flatness, consistent mechanical response, and enhanced formability—critical for automated stamping, robotic welding, and high-yield fabrication.
Engineered for Extreme Conditions
Grade 439 excels where temperatures exceed 650°C (1200°F) and corrosive condensates are present. Key performance attributes include:
✅ Outstanding Oxidation Resistance
Stable up to 800°C (1472°F) due to a dense, self-healing Cr₂O₃ layer that resists scaling and spallation.
Stable up to 800°C (1472°F) due to a dense, self-healing Cr₂O₃ layer that resists scaling and spallation.
✅ Titanium Stabilization
Ti binds carbon and nitrogen, preventing chromium depletion at grain boundaries—eliminating intergranular corrosion after welding or prolonged high-temp exposure.
Ti binds carbon and nitrogen, preventing chromium depletion at grain boundaries—eliminating intergranular corrosion after welding or prolonged high-temp exposure.
✅ Low Thermal Expansion
Ferritic structure offers ～30% lower expansion than austenitic grades, reducing warpage and joint fatigue in cyclic heating applications.
Ferritic structure offers ～30% lower expansion than austenitic grades, reducing warpage and joint fatigue in cyclic heating applications.
✅ High Durability
Resists pitting from road salt, acid condensates (H₂SO₄, HNO₃), and sulfur-rich exhaust gases—extending component life by 2–3× vs. mild steel or 409 stainless.
Resists pitting from road salt, acid condensates (H₂SO₄, HNO₃), and sulfur-rich exhaust gases—extending component life by 2–3× vs. mild steel or 409 stainless.
✅ Excellent Fabrication Characteristics
Despite its strength at temperature, it maintains >25% elongation for deep drawing, bending, and hydroforming without cracking.
Despite its strength at temperature, it maintains >25% elongation for deep drawing, bending, and hydroforming without cracking.
Technical Specifications
| Parameter | Details |
|---|---|
| Grade | UNS S43035 / ASTM A240 Type 439 / EN 1.4510 / JIS SUS 439 |
| Form | Precision Cold-Rolled Sheet |
| Thickness Range | 0.8 mm – 10.0 mm (custom tolerances available) |
| Standard Tolerance | ±0.02 mm (for 0.8–3.0 mm); ±0.05 mm (for >3.0 mm) |
| Widths | 600–2000 mm (standard); custom slitting available |
| Lengths | Cut-to-length (e.g., 2438 mm / 8 ft) or coil |
| Surface Finish | 2B (standard), BA, Hairline, or customer-specified |
| Standards | ASTM A240, EN 10088-2, JIS G4305, GB/T 4237 |
| Certifications | ISO 9001, IATF 16949, RoHS; EN 10204 3.1 MTRs provided |
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: Tight control of C+N (<0.05%) and Ti ensures maximum stabilization efficiency.
Mechanical & Physical Properties (Annealed Condition)
| Property | Typical 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) |
Applications
- Automotive: Exhaust manifolds, catalytic converter shells, mufflers, tailpipes
- Industrial: Burner tubes, flue gas ducts, heat recovery units
- Appliances: Oven liners, dishwasher tanks, dryer drums
- Energy: Biomass boiler components, solar thermal receivers
Precision-rolled 439 is especially valued in emission-critical systems where material failure risks regulatory non-compliance or warranty claims.
Advantages Over Standard Grades
| Feature | Precision-Rolled 439 | Standard 409 | Hot-Rolled 430 |
|---|---|---|---|
| Thickness Tolerance | ±0.02 mm | ±0.10 mm or worse | ±0.20 mm |
| Surface Quality | Smooth, defect-free | Scale, pits common | Rough, oxidized |
| Formability Consistency | High (uniform grain) | Variable | Poor |
| Post-Fabrication Yield | >95% | 80–85% | <80% |
| High-Temp Performance | Excellent | Moderate | Fair |
This consistency translates to lower scrap rates, faster cycle times, and reduced rework.
Quality Assurance Process
Every coil/sheet undergoes:
- Spectrometric chemistry verification
- Tensile & hardness testing per batch
- Automated surface inspection (CCD cameras detect micro-defects)
- Laser thickness profiling across width and length
- Full traceability from melt ID to final shipment
All products comply with IATF 16949, the global automotive quality standard.
Sustainability & Lifecycle Value
- 60–80% recycled content
- Fully recyclable at end-of-life
- Enables thinner designs (e.g., 1.2 mm vs. 1.5 mm) → weight savings → lower CO₂ emissions
- Long service life reduces replacement frequency and resource consumption
A true “green” material for sustainable manufacturing.
Packaging & Delivery
- Sheets: interleaved with anti-scratch paper, strapped on export pallets
- Coils: VCI-wrapped, waterproof, mounted on iron cores
- Global logistics via sea, air, or land
- Lead time: 7–15 days (stock); 30–45 days (custom orders)
Partner With Confidence
We offer more than material—we provide:
- Technical consultation for material selection and process optimization
- Prototype support with rapid sample delivery
- Value-added services: slitting, blanking, laser cutting, edge conditioning
- Just-in-time (JIT) inventory programs for high-volume customers
Conclusion
Precision-rolled Grade 439 stainless steel sheet sets a new benchmark for heat resistance, dimensional accuracy, and long-term durability in extreme environments. By combining advanced rolling technology with the proven chemistry of titanium-stabilized ferritic stainless steel, it delivers unmatched reliability for mission-critical components.
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