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Your Trusted Partner for High-Quality Cold Rolled ASTM 409 2B Finish Stainless Steel Sheets
Welcome to Wuxi Yansheng Technology Co., Ltd. – a professional manufacturer established in 2017 with a factory spanning 1,000–3,000 square meters. Since our inception, we have focused on delivering premium stainless steel solutions for automotive and industrial applications. Our Cold Rolled ASTM 409 ASTM Standard 2B Finish Automotive Exhaust Stainless Steel Sheet is specifically engineered to meet the rigorous demands of modern exhaust systems, offering excellent corrosion resistance, high-temperature stability, and excellent formability. With an annual export value exceeding US$50 million and a dedicated team of 101–200 employees, we ensure that every sheet leaving our factory meets the highest standards of precision and durability. We serve markets across North America, South America, Europe, Asia, and beyond, and we are proud to be your reliable partner in the global stainless steel supply chain.
What Makes Our ASTM 409 Stainless Steel Sheet Stand Out?
This product is a cold-rolled, 2B finish stainless steel sheet conforming to the ASTM 409 specification. Grade 409 is a ferritic stainless steel with a nominal composition of 10.5% chromium, designed to provide superior resistance to oxidation and corrosion in high-temperature exhaust environments. The 2B finish is achieved through cold rolling followed by bright annealing and light temper rolling, resulting in a smooth, reflective surface that is both aesthetically pleasing and functional. Ideal for automotive exhaust components – such as mufflers, catalytic converters, pipes, and heat shields – this material offers a cost-effective alternative to higher-grade stainless steels while maintaining excellent performance under heat and vibration.
Key Features & Technical Specifications
- Excellent Corrosion Resistance – Resists exhaust gas condensate and road salt, extending service life.
- High-Temperature Performance – Withstands continuous operating temperatures up to 700°C (1292°F), making it suitable for hot-end exhaust parts.
- Good Formability & Weldability – Can be easily cut, bent, stamped, and welded using standard techniques.
- Consistent 2B Surface Finish – Provides a smooth, low-maintenance surface that reduces deposit buildup.
- Cost-Effective – Balances performance with lower material cost compared to austenitic grades like 304 or 316.
- Precise Dimensional Tolerances – Manufactured with strict control over thickness, flatness, and edge quality.
- Environmentally Friendly – 100% recyclable material, supporting sustainable manufacturing practices.
| Parameter | Specification |
|---|---|
| Standard | ASTM A240 / ASTM 409 |
| Grade | 409 (UNS S40900) |
| Surface Finish | 2B (Cold rolled, bright annealed, light temper) |
| Thickness Range | 0.3 mm – 3.0 mm (customizable) |
| Width Range | 600 mm – 1500 mm (customizable) |
| Length Range | 1000 mm – 6000 mm (customizable) |
| Tensile Strength | ≥ 380 MPa (55 ksi) |
| Yield Strength (0.2% offset) | ≥ 205 MPa (30 ksi) |
| Elongation (in 50mm) | ≥ 20% |
| Hardness (HRB) | ≤ 88 |
Benefits for Your Business:
By choosing our Cold Rolled ASTM 409 2B Finish Stainless Steel Sheet, you gain:
- Reduced manufacturing costs – Lower material cost compared to 304/316, without sacrificing performance in exhaust applications.
- Improved product longevity – Enhanced resistance to thermal fatigue and corrosion leads to longer-lasting components.
- Faster production cycles – Excellent formability reduces tool wear and allows for complex geometries.
- Reliable supply chain – With multiple ports of shipment (Tianjin, Shanghai, Qingdao, Ningbo) and flexible shipping options, we ensure on-time delivery.
- Customizable dimensions – We can slit, cut, or flatten sheets to your precise requirements, minimizing waste.
Frequently Asked Questions (FAQ)
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Q: What is the difference between ASTM 409 and 304 stainless steel for exhaust applications?
A: ASTM 409 is a ferritic stainless steel with lower nickel content, making it more cost-effective for exhaust systems. It offers good oxidation resistance up to 700°C, while 304 (austenitic) provides better corrosion resistance in acidic environments but is more expensive. For typical automotive exhaust, 409 is the preferred choice due to its balance of performance and economy. -
Q: Can this sheet be welded easily?
A: Yes, grade 409 has good weldability using common methods like MIG, TIG, or resistance welding. Preheating is generally not required for thin gauges, but for thicker sections, a preheat of 150-200°C is recommended to avoid cracking. -
Q: What is the typical lead time for an order?
A: For standard sizes and quantities, lead time is usually 15–25 working days. Custom dimensions or large volumes may require 30–40 days. We offer expedited shipping for urgent orders upon request. -
Q: Does the 2B finish require additional surface treatment before use?
A: The 2B finish is a smooth, bright annealed surface suitable for most automotive exhaust applications. If a higher gloss or specific texture is needed, optional polishing or brushing can be applied at an additional cost. -
Q: What certifications do you have for quality control?
A: Our manufacturing facility is certified under ISO9001, ISO14001, and other internationally recognized standards. We also have experience with OHSAS18001, SA8000, and various industry-specific certifications. All materials are supplied with mill test certificates (MTC) and can be third-party inspected if required. -
Q: Can you supply cut-to-size sheets or coils?
A: Yes, we offer both sheets and coils. Sheets can be cut to your exact dimensions (length, width, thickness) with standard tolerances. Coils are available in widths up to 1500mm, with slitting options for narrower widths. -
Q: What is the minimum order quantity (MOQ)?
A: For standard products, the MOQ is 1 ton per size. For custom sizes or special finishes, the MOQ may be higher, but we are flexible to accommodate trial orders. Please contact us for specific requirements. -
Q: How do you ensure the dimensional accuracy of the sheets?
A: We use advanced cold rolling mills and precision leveling equipment. All sheets are inspected with automated thickness gauges and flatness checking systems. Our quality team conducts random sampling per ASTM standards to ensure compliance before shipment.
Why Choose Wuxi Yansheng Technology Co., Ltd.?
We are not just a supplier; we are a long-term partner dedicated to quality and reliability. With a factory size of 1,000–3,000 m² and a team of 101–200 skilled professionals, we have the capacity to handle large-scale orders while maintaining individual attention to each customer. Our annual export value of US$50–100 million reflects the trust our global clients place in us. We are certified under multiple quality management systems (ISO9001, ISO14001, ISO16949, etc.) and our products are regularly tested to meet ASTM standards. Our main markets span six continents, and we have extensive experience in automotive, industrial, and construction sectors. We offer flexible shipping from major Chinese ports (Tianjin, Shanghai, Qingdao, Ningbo) and provide comprehensive after-sales support. Whether you need standard sheets or custom solutions, we invite you to experience the Yansheng difference. Contact us today for a quote or to discuss your specific requirements!
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