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Grade 439 Stainless Steel Sheet Thickness 0.8 - 10.0mm for Automotive Exhaust

China Grade 439 Stainless Steel Sheet Thickness 0.8 - 10.0mm for Automotive Exhaust

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Grade 439 Stainless Steel Sheet Thickness 0.8 - 10.0mm for Automotive Exhaust

MOQ： 500 kgs
Price： 1.5 - 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 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
Brand Name	TISCO
Model Number	439
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 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
Brand Name	TISCO	Model Number	439
Certification	ISO	Place of Origin	China
High Light	Grade 439 stainless steel sheet ，Stainless steel sheet for automotive exhaust ，0.8-10.0mm stainless steel sheet

Grade 439 Stainless Steel Sheet Thickness 0.8 - 10.0mm for Automotive Exhaust Systems

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

Grade 439 Stainless Steel Sheet – Thickness 0.8–10.0 mm for Automotive Exhaust Systems

Product Overview

Grade 439 stainless steel sheet is a high-performance, ferritic stainless steel specifically engineered for demanding applications in automotive exhaust systems. With its excellent corrosion resistance, superior high-temperature oxidation resistance, and outstanding formability, Grade 439 offers an ideal balance of cost-efficiency and durability—making it a preferred choice among global automotive manufacturers and Tier 1 suppliers.

Available in thicknesses ranging from 0.8 mm to 10.0 mm, this material meets stringent international standards including ASTM A240/A240M, EN 10088-2, and JIS G4305, ensuring consistent quality across diverse production environments. Whether used in mufflers, catalytic converters, manifolds, or tailpipes, Grade 439 delivers long service life under thermal cycling and aggressive exhaust gas conditions.

Why Choose Grade 439 for Automotive Exhaust?

Automotive exhaust components operate in harsh environments characterized by:

Continuous exposure to high temperatures (up to 800°C / 1472°F)
Condensation of acidic condensates (e.g., sulfuric and nitric acids)
Thermal fatigue from repeated heating/cooling cycles
Road salt and environmental pollutants

Grade 439 addresses these challenges through:

Stabilization with Titanium (Ti): Prevents sensitization during welding and high-temperature exposure by binding carbon and nitrogen, minimizing chromium carbide precipitation.
Low Carbon & Nitrogen Content: Enhances weldability and intergranular corrosion resistance.
Chromium Content of 17–19%: Provides robust passive oxide layer formation for corrosion protection.
Ferritic Structure: Offers good thermal conductivity and lower thermal expansion than austenitic grades (e.g., 304), reducing distortion.

Compared to standard 409 or 430 stainless steels, Grade 439 offers significantly improved high-temperature strength and oxidation resistance—bridging the performance gap toward more expensive grades like 321 or 347, but at a lower cost.

Key Specifications

Property	Value / Range
Grade	UNS S43035 / ASTM 439 / EN 1.4510
Thickness	0.8 mm – 10.0 mm
Width	600 mm – 2000 mm (customizable)
Length	As per customer requirement (cut-to-length coils or sheets)
Surface Finish	2B, BA (Bright Annealed), No.1, Hairline, or Custom
Standards	ASTM A240, EN 10088-2, JIS G4305, GB/T 4237
Delivery Condition	Annealed & Pickled, Cold Rolled
Certifications	ISO 9001, IATF 16949 (automotive quality management), RoHS, Material Test Reports (MTR) available

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: Titanium content is carefully controlled to ensure optimal stabilization without excessive grain growth.

Mechanical 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
Melting Range	～1425–1510°C

These properties ensure excellent deep-drawing and bending capabilities—critical for complex exhaust component geometries.

Applications in Automotive Exhaust Systems

Grade 439 stainless steel sheets are widely used in the following components:

Exhaust Manifolds
Resists thermal fatigue and scaling at elevated temperatures.
Catalytic Converter Housings
Maintains structural integrity under continuous high heat and chemical exposure.
Mufflers & Resonators
Combats internal corrosion from condensate and external road salt.
Tailpipes & Intermediate Pipes
Offers aesthetic durability and long-term rust resistance.

Its performance allows automakers to extend vehicle warranty periods on exhaust systems while meeting emissions and fuel efficiency targets.

Advantages Over Competing Grades

Feature	Grade 439	Grade 409	Grade 430	Grade 304
Chromium (%)	17–19	10.5–11.75	16–18	18–20
Stabilized (Ti/Nb)	Yes (Ti)	Yes (Ti)	No	No (unless 321)
Max Service Temp (°C)	～800	～650	～700	～870
Corrosion Resistance	Excellent	Moderate	Good	Excellent
Cost Efficiency	High	Very High	High	Low
Weldability	Good	Good	Fair	Excellent

Grade 439 strikes the optimal balance—offering near-austenitic performance at ferritic pricing.

Manufacturing & Quality Assurance

Our Grade 439 stainless steel sheets are produced using advanced AOD (Argon Oxygen Decarburization) refining and continuous casting technologies to minimize inclusions and ensure ultra-low interstitial content. Each coil undergoes:

Ultrasonic Testing (optional for critical applications)
Surface Inspection via automated vision systems
Dimensional Accuracy Control (±0.02 mm tolerance on thickness)
Full Mill Test Reports (MTRs) with chemical and mechanical data

We maintain IATF 16949 certification, ensuring compliance with automotive industry quality protocols. All products are traceable from melt to delivery.

Packaging & Logistics

To prevent surface damage during transit:

Sheets are interleaved with anti-scratch paper
Coils are wrapped in waterproof VCI film and secured on iron pallets
Export-ready packaging compliant with ISO and customer-specific requirements
Global shipping via FOB, CIF, or EXW terms

Lead time: 7–15 days from stock; 30–45 days for custom orders.

Environmental & Sustainability Benefits

100% Recyclable: Stainless steel retains value at end-of-life
Lightweight Potential: Thinner gauges (e.g., 0.8–1.2 mm) reduce vehicle weight, improving fuel economy
Long Service Life: Reduces replacement frequency and resource consumption

Grade 439 supports OEMs in achieving sustainability goals without compromising performance.

Technical Support & Customization

We offer:

Material selection consultation
Prototype development support
Custom thicknesses, widths, and surface finishes
Laser cutting, slitting, and blanking services

Our engineering team collaborates with customers to optimize material usage and reduce fabrication costs.

Conclusion

Grade 439 stainless steel sheet (0.8–10.0 mm) represents the smart choice for modern automotive exhaust systems—delivering exceptional corrosion and heat resistance, excellent formability, and cost-effective lifecycle performance. Backed by rigorous quality control and global supply capabilities, it empowers automakers to build cleaner, quieter, and longer-lasting vehicles.

Ready to upgrade your exhaust system materials? Contact us today for samples, technical data sheets, or a customized quote.

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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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JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
https://www.stainless-strips.com/

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