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Industrial-Grade 409L Stainless Steel Sheet – Durable and Heat-Resistant for

China Industrial-Grade 409L Stainless Steel Sheet – Durable and Heat-Resistant for

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Industrial-Grade 409L Stainless Steel Sheet – Durable and Heat-Resistant for

MOQ： 50 kgs
Price： 1.2-2USD/Kg
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Payment Terms	L/C, T/T, Western Union
Supply Ability	20Ton per week
Delivery Time	5 - 12 days based on the quantity
Packaging Details	standard packing for export
Products	Stainless Steel Plate
Grade	409L
Thickness	0.5-50.0mm
Tech	cold rolled,hot rolled , forged
Width	1000mm 1219mm 1500mm or customs as request
Surface	2D NO.1
Standard	ASTM GB JIS EN DIN
MOQ	1 Ton
Brand Name	BAOSTEEL TISCO
Model Number	409L
Certification	ISO
Place of Origin	China

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Product Specification


Payment Terms	L/C, T/T, Western Union	Supply Ability	20Ton per week
Delivery Time	5 - 12 days based on the quantity	Packaging Details	standard packing for export
Products	Stainless Steel Plate	Grade	409L
Thickness	0.5-50.0mm	Tech	cold rolled,hot rolled , forged
Width	1000mm 1219mm 1500mm or customs as request	Surface	2D NO.1
Standard	ASTM GB JIS EN DIN	MOQ	1 Ton
Brand Name	BAOSTEEL TISCO	Model Number	409L
Certification	ISO	Place of Origin	China
High Light	409L stainless steel sheet ，heat-resistant stainless steel sheet ，industrial-grade exhaust components steel

Industrial-Grade 409L Stainless Steel Sheet – Durable and Heat-Resistant for Exhaust Components

Stainless Steel Plate Specifications

Name	409L 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, BA, No.4, 8k, Brushed,Hairline,PVD Coating,Sandblasted
Service	Laser Cutting, Bending
Sample	Available

Industrial-Grade 409L Stainless Steel Sheet – Durable and Heat-Resistant for Exhaust Components

Product Overview

Engineered for demanding thermal and mechanical environments, Industrial-Grade 409L Stainless Steel Sheet delivers exceptional heat resistance, structural durability, and long-term corrosion performance—making it the preferred material for automotive, commercial vehicle, and industrial exhaust systems. As a low-carbon, titanium-stabilized ferritic stainless steel, 409L (UNS S40903) offers an optimal balance of performance and cost-efficiency, outperforming mild steel and aluminized alternatives while avoiding the premium price of higher-alloyed grades like 304 or 439.

Backed by global standards including ASTM A240, JIS G 4304/4305, and EN 10088-2, this industrial-grade sheet is manufactured for consistent quality, reliable fabrication, and compliance with stringent emission regulations—from Euro 5 to China 6 and EPA Tier 3.

Why 409L Is Ideal for Exhaust Components

Exhaust systems operate under extreme conditions: cyclic heating from –30°C to 650°C (–22°F to 1202°F), exposure to acidic condensates, road salts, vibration, and thermal fatigue. 409L is specifically engineered to thrive in this environment:

Titanium stabilization prevents chromium carbide formation during welding or high-temp exposure
Low carbon content (≤0.03%) eliminates sensitization and intergranular corrosion
Ferritic microstructure provides low thermal expansion and excellent thermal cycling resistance
Protective chromium oxide layer resists scaling and oxidation up to 650°C

These properties ensure longer service life, reduced maintenance, and compliance with modern durability requirements—all at a fraction of the cost of austenitic stainless steels.

Key Benefits of Industrial-Grade 409L Sheet

Feature	Advantage
High-Temperature Stability	Maintains strength and resists scaling up to 650°C continuous use
Excellent Weldability	No preheating or post-weld annealing required; compatible with robotic welding
Good Formability	Suitable for deep drawing, bending, and stamping of complex exhaust geometries
Cost Efficiency	30–50% lower material cost than 304 stainless due to zero nickel content
Durability	2–3× longer lifespan than aluminized steel in real-world exhaust applications
Magnetic Properties	Enables automated handling in high-volume production lines
Eco-Friendly	>95% recyclable; supports OEM sustainability and circular economy goals

Technical Specifications

Chemical Composition (Typical – Compliant with ASTM A240 & JIS G 4304)

Element	Content (%)
Carbon (C)	≤ 0.03
Chromium (Cr)	10.5 – 11.7
Titanium (Ti)	≥ 6×C, max 0.75
Manganese (Mn)	≤ 1.00
Silicon (Si)	≤ 1.00
Phosphorus (P)	≤ 0.040
Sulfur (S)	≤ 0.030
Nickel (Ni)	≤ 0.50
Iron (Fe)	Balance

Mechanical & Physical Properties (Annealed Condition)

Property	Value
Tensile Strength	415 – 520 MPa
Yield Strength (Rp0.2)	275 – 380 MPa
Elongation	≥ 20%
Hardness	≤ 85 HRB
Density	7.75 g/cm³
Max Continuous Service Temperature	650°C (1202°F)
Thermal Conductivity (100°C)	～25.8 W/m·K
Coefficient of Thermal Expansion (20–100°C)	10.6 × 10⁻⁶ /K

Note: Cold-rolled variants offer higher strength; hot-rolled versions provide superior high-temperature ductility.

Available Forms & Surface Finishes

Product Form	Thickness Range	Standard Finish	Typical Use
Hot-Rolled Sheet/Plate	2.0 – 12.0 mm	NO.1 (matte, descaled)	Manifolds, muffler shells, heavy-duty exhaust pipes
Cold-Rolled Sheet	0.3 – 4.0 mm	2B (smooth, semi-bright)	Catalytic converter housings, tailpipes, brackets
Coil Stock	0.4 – 6.0 mm	2D or 2B	High-speed stamping and roll-forming operations

All products meet ASTM, JIS, ISO, and EN specifications. Custom surface treatments (e.g., anti-fingerprint coating, oil-free finish) available on request.

Common Industrial Applications

Automotive Exhaust Systems:
- Exhaust manifolds
- Flex joints and intermediate pipes
- Mufflers, resonators, and tailpipes
- Catalytic converter outer shells
Commercial & Heavy-Duty Vehicles:
- Diesel particulate filter (DPF) housings
- Selective catalytic reduction (SCR) system components
- Bus and truck exhaust tubing
Industrial Equipment:
- Agricultural machinery exhausts
- Generator exhaust manifolds
- Low-pressure heat exchangers (non-marine)

Each passenger vehicle typically uses 40–65 kg of 409L stainless steel—proof of its dominance in emission-critical design.

Fabrication Guidelines

Welding

Fully compatible with TIG (GTAW), MIG (GMAW), laser, and resistance spot welding
No risk of weld decay due to Ti stabilization
Recommended filler: ER409L or ER430

Forming

Excellent cold formability for bend radii ≥ 2× material thickness
Avoid sharp notches or excessive edge strain during stamping

Machining

Moderate machinability; use sharp carbide tools, low speeds, and ample coolant
Not recommended for fine threading or high-tolerance bores

Heat Exposure

Stable under continuous operation at 650°C
Short-term excursions to 750°C acceptable but may cause light scaling

Quality Assurance & Certification

Every production batch undergoes rigorous quality control:

Spectrometric chemical analysis
Tensile, hardness, and bend testing
Ultrasonic or eddy current inspection (for critical applications)
Surface defect scanning under standardized lighting

Mill Test Certificates (MTCs) per EN 10204 3.1 are provided with full traceability.

Packaging & Delivery

To ensure product integrity during global shipping:

Sheets/coils wrapped in VCI anti-corrosion paper
Edges protected with plastic corner guards
Palletized and secured with steel strapping
Optional: Wooden crates for export or long-term storage

Standard Dimensions:

Width: 1000–2000 mm
Length: 2000–6000 mm (cut-to-length) or in coil
Thickness: 0.3–12.0 mm (process-dependent)

Custom cutting (slitting, blanking, leveling) available upon request.

Environmental & Economic Impact

Reduces vehicle weight vs. traditional materials → improves fuel efficiency
Extends component life → lowers total cost of ownership
Fully recyclable at end-of-life (up to 98% recovery rate)
Supports global decarbonization goals through durable, low-maintenance design

Frequently Asked Questions (FAQ)

Q: Can 409L be used in marine environments?
A: Not recommended for prolonged saltwater exposure. For coastal or marine applications, consider 316L or 444 stainless steel.

Q: Is 409L magnetic?
A: Yes—its ferritic structure makes it strongly magnetic, which is advantageous for automated assembly.

Q: How does 409L compare to aluminized steel?
A: 409L lasts 2–3× longer, handles higher temperatures, and doesn’t degrade when scratched—unlike aluminized coatings.

Q: What’s the difference between 409 and 409L?
A: 409L has lower carbon (<0.03%), significantly improving weldability and resistance to intergranular corrosion.

Conclusion

Industrial-Grade 409L Stainless Steel Sheet is more than just a material—it’s a proven engineering solution for the toughest thermal challenges in exhaust and emission control systems. With its robust heat resistance, ease of fabrication, and unmatched cost-performance ratio, it remains the industry standard for OEMs and Tier 1 suppliers worldwide.

Whether you’re designing for durability, regulatory compliance, or lifecycle cost savings, 409L delivers consistent, reliable performance—batch after batch.

Contact us today for technical data sheets, samples, or volume quotations—and build exhaust systems that perform, endure, and exceed expectations.

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Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...

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