409 is equivalent to
409 stainless steel exhibits excellent resistance to high temperatures and corrosion, making it ideal for automotive exhaust systems.
The performance of 409 stainless steel is exceptional, and its relatively low cost makes it more economical and affordable.
For High-Performance Exhaust Systems:
Choose 304 Stainless Steel for its superior corrosion resistance, especially in environments exposed to salt or industrial pollutants. This choice is ideal for customers seeking long-term durability and performance.
For Standard Automotive Exhaust Systems:
Choose 409 Stainless Steel due to its good high-temperature resistance and cost-effectiveness. It is suitable for most automotive applications where extreme environmental exposure is not a concern, providing a balance between performance and affordability.
Property | 304 Stainless Steel | 409 Stainless Steel |
Composition | 18-20% Cr, 8-12% Ni, ≤0.08% C | 10.5-11.75% Cr, ≤0.03% C |
Corrosion Resistance | Excellent in various environments | Good, particularly in high-temperature exhaust conditions |
Temperature Resistance | Up to 870°C (1598°F) in continuous service | Up to 675°C (1247°F) in continuous service |
Formability | Excellent | Good |
Weldability | Excellent | Good |
Magnetic Properties | Non-magnetic in annealed condition | Slightly magnetic |
Cost | Higher | Lower |
304 Stainless Steel:
Advantages: Offers superior corrosion resistance, particularly in marine or industrial environments. Excellent formability and weldability make it suitable for complex shapes and joints in exhaust systems.
Disadvantages: Higher cost compared to 409 stainless steel.
Typical Use: Ideal for high-performance and long-lasting exhaust systems, especially where the exhaust system may be exposed to harsh environments or salt (e.g., coastal areas).
409 Stainless Steel:
Advantages: Good oxidation and corrosion resistance at high temperatures, making it suitable for automotive exhaust systems. It is more cost-effective than 304, providing a good balance between performance and price.
Disadvantages: Lower overall corrosion resistance compared to 304, and slightly less formability and weldability.
Typical Use: Commonly used in standard automotive exhaust systems where cost considerations are important, and the exhaust system does not face extremely harsh environmental conditions.
Type | Width (mm) | Weight (MT) | Thickness (mm) | ||||
409 Coil | 1000, 1219, 1240, 1500 or Customized | 3-10 | 0.15-3.0 |
Type | Width (mm) | Length (mm) | Thickness (mm) | |||||||||
409 Sheets | 1000, 1219, 1240, 1500 or Customized | 2000, 2438, 2500, 3000, 3048 | 0.3-3.0 |
The basic finish options for 201, 304, 304L, 316, 316L, and 430, etc. stainless steel coils and sheets include 2B, BA, No. 1, and No. 4 finishes. Please get in touch with our professional sales team for details on other grades and finishes.
We are committed to giving our customers the best and highest quality service to ensure our customers' satisfaction.
Certified by prestigious institutions and committed to adhering to international standards in every aspect.
Stianless Steel is an indispensable material across a wide spectrum of industries, from food processing and medical equipment to household goods, construction, and industrial applications.
Customer feedback is the most authentic reflection of a company's quality.
View more technical references from Sanmei Metal regarding stainless steel coils and stainless steel sheets.