| 409/409L Stainless Steel Coil Specification |
ASTM A240 / ASME SA240 |
| 409/409L Stainless Steel Coil Manufacturing Process |
Hot Rolled (HR) / Cold Rolled (CR) |
| 409/409L Stainless Steel Coil Grades |
201 / 304 / 304L/ 409/409L / 309S / 420 / 316 / 316L / 316Ti / 317L / 321 / 321H / 347 / 347H / 904L etc. |
| UNS No. - UNS S409/409L, UNS S31008, UNS S31600, UNS S31603, UNS S31603, UNS S31600, UNS S31703, UNS S32100, UNS S34700, UNS S34709, UNS S8904 |
| EN No. 1.4512,1.4845, 1.4401, 1.4404, 1.4571, 1.4438, 1.4541, 1.4550, 1.4551, 1.4539 |
| 409/409L Stainless Steel Coil Thickness |
0.6 MM TO 16 MM THICKNESS |
| 409/409L Stainless Steel Coil Width |
1250 MM / 1500 MM / 2000 MM / 04 Feet / 05 Feet and Custom Cut Width as Per Requirement |
| 409/409L Stainless Steel Coil Length |
2400 MM / 2420 MM / 6000 MM / 08 Feet / 10 Feet / Coil Cut and Custom Cut Length as Per Requirement |
| 409/409L Stainless Steel Coil Surface Finish |
2B, 2D, BA, MATT, MATT PVC, No.4, No.5, SB, HR, No.8, Mirror, Hairline, Brush, Textured, Oil base wet Polished, Both sides Polished available. |
| 409/409L Stainless Steel Coil Coating |
PVC coating Normal / Laser, Film: 100 micrometer, Color: black/white. |
| 409/409L Stainless Steel Coil Other Testing |
NACE MR0175, Ultrasoung TEST, IGC TEST, Intergranular Corrrosion Test as per ASTM A262 Practice E, Charpy Impact Test, Macro, Grain Size, Hardness, etc. |
| 409/409L Stainless Steel CoilValue Added Services |
Gas Cutting / CNC Plasma Cutting / Profiling / Rolling / Bending / Sheet Metal Fabrication / Drill / Punch / Machining / Sand Blasting / Shot Blasting / Heat Treatment |
| 409/409L Stainless Steel Coil Packaging |
Loose / Carrate / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps |
| 409/409L Stainless Steel Coil Shipment & Transportation |
By Road - Truck / Train Partial Load, Full Load, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes |
| 409/409L Stainless Steel Coil Material Test Certificate |
Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS, Bureau of Indian Standards BIS Approved ETC |
| Manufacturer |
POSCO, Aperam, Jindal Stainless, DKC Korea, Thyssenkrup, Baosteel, TISCO,Arcelor Mittal, VDM,Nippon Metal,Qingshan,Delong. |
| Shipping Port |
Shanghai/Ningbo port/Tianjin/Qindao |
Renowned Global Leader in Stainless Steel Coil Fabrication Services
Type 409 Stainless Steel (UNS S40900) stands as a stabilized ferritic stainless steel boasting superior oxidation and corrosion resistance compared to carbon steel. Its ease of manufacture, coupled with excellent corrosion resistance and cost-effectiveness, has significantly expanded its application in both automotive exhaust systems and various non-automotive sectors. ASTM A240 outlines three (3) specific subcategories of Type 409 stainless steel: UNS S40910, UNS S40920, and UNS S40930. These designations differ in their Ti or Nb stabilization requirements. Unless specified otherwise by the purchaser, any of these compositions may be provided as UNS S40900. It is produced with enhanced formability properties, often referred to as 'High Performance' or 'Ultra Form' within the industry.
At Daxun Stainless Steel, we ensure complete traceability of each stainless steel coil through our advanced ERP system, encompassing type, specification, and origin. We champion industry anti-counterfeiting measures. Leveraging cutting-edge technology for processing and customization, we set the industry benchmark with our precision and high-quality standards. Our comprehensive service includes professional material selection and processing solutions before sales, rigorous monitoring during sales, and assured worry-free service post-sales.
Uncompromising Quality, Timely Delivery, Rigorous Inspection
- Daxun conducts an array of stringent quality assurance tests. These include flattening tests, pitting and resistance tests, mechanical tests, hardness tests, material positive identification, and expansion tests. Each test guarantees that the material meets the specific application requirements.
- Throughout the production process, we meticulously measure the diameter, thickness, and surface quality of each product. Our standard delivery timeframe is 7-15 days, although certain special size products may extend the delivery span to 20 days.
Adherence to Contractual Delivery Timeframes
- Third-Party Agency Factory Inspections Supported
- Complimentary Sample Testing Available for Customers
- Support for On-Site and Video Factory Inspections
Ordering Information
Purchase orders should detail the quantity, grade, type or category, API5L reference, thickness, width, length, and any additional requirements related to chemical composition, mechanical properties, heat treatment, supplementary testing, manufacturing process, surface coating, or end finish. Contact Daxun now, and we will respond to your email promptly.
Jiangsu Daxun Alloy Co., Ltd. has been pioneering in the stainless steel industry since 2003. Over the past two decades, we have led the market with our superior stainless steel materials and advanced processing techniques.
With over 20 years of international engagement, Daxun has emerged as a leader in the global stainless steel trade. In 2022 alone, our export revenue surpassed US$100 million, placing us among the top-tier companies in China's stainless steel trade and processing sector. Our strategically located export service bases in China, combined with partnerships with engineering firms, steel mills, and international trading companies, allow us to consistently elevate our service standards and expand our global footprint.
Daxun International offers comprehensive stainless steel chain supermarket services through long-term collaborations with renowned steel mills worldwide. We maintain an impressive inventory of 60,000 tons of standard stainless steel and 20,000 tons of specialty metals, including duplex steel, nickel-based alloys, and heat-resistant steel. Our commitment to quality ensures that our stainless steel materials are always reliable and authentic, with varieties, specifications, and delivery weights adhering strictly to standards.
Equipped with state-of-the-art steel processing equipment, Daxun boasts a cutting-edge physical and chemical testing center. Our extensive processing capabilities include cutting, grinding, forming, beveling, welding, heat treatment, machining, and spraying, ensuring precision and excellence at every stage.
We serve over 30 industries, from automotive and home appliances to energy equipment and bio-fermentation. Collaborating with steel mills, research institutes, and various organizations, we provide end-to-end solutions encompassing project design, material development, and process optimization for manufacturing.
409409 Stainless Steel Coil Chemical Composition
| Element |
UNS S40910 |
UNS S40920 |
UNS S40930 |
| Carbon |
0.030 max. |
0.030 max. |
0.030 max |
| Manganese |
1.00 max. |
1.00 max. |
1.00 max. |
| Sulfur |
0.020 max. |
0.020 max |
0.020 max |
| Phosphorus |
0.040 max. |
0.040 max. |
0.040 max. |
| Silicon |
1.00 max. |
1.00 max. |
1.00 max. |
| Chromium |
10.5 - 11.7 |
10.5 - 11.7 |
10.5 - 11.7 |
| Nickel |
0.50 max. |
0.50 max. |
0.50 max. |
| Nitrogen |
0.030 max. |
0.030 max. |
0.030 max. |
| Titanium |
6x(C+N) min. - 0.50 max. |
8X(C+N)min. / 0.15 - 0.50 |
0.05 min. |
| Niobium |
0.17 max. |
0.10 max. |
|
| Ti + Nb |
|
|
[0.08+8x(C+N)] min. - 0.75 max. |
409 Stainless Steel Coil Mechanical Properties
| Type |
Yield Strength 0.2% offset (KSI) |
Tensile Strength (KSI) |
% Elongation (2″ Gauge length) |
| S40910 |
25 min. |
55 min |
20 min. |
| S40920 |
25 min. |
55 min. |
20 min. |
| S40930 |
25 min. |
55 min. |
20 min. |
409 Stainless Steel Coil Physical Properties
| Density (lb./ in^2) @ RT |
|
0.28 |
| Modulus of Elasticity in Tension (psi x 10^6) |
|
29 |
| Specific Heat (BTU/o F/lb.) |
32 to 212 oF |
0.114 |
| Thermal Conductivity (BTU/hr/ft^2/ft) |
212oF |
14.4 |
| Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F) |
32 to 212oF |
5.84 |
| |
32 to 500oF |
6.12 |
| |
32 to 900oF |
6.6 |
| |
32 to 1,200oF |
6.86 |
| Electrical Resistivity (micro ohms - cm) |
at 70oF |
60 |
| Oxidation Resistance - Continuous Service(oF) |
|
1450 |
Grade 409
- Grade 409 is a titanium-stabilized ferritic stainless steel. As a versatile chromium-based stainless steel, it is predominantly employed in automotive exhaust systems. This material excels in applications where mechanical properties, corrosion resistance, and weldability are prioritized over appearance, especially under high-temperature conditions.
- ASTM standards, including ASTM A240M for flat-rolled steel, now classify S40910, S40920, and S40930 as 'sub-grades' rather than the generic Grade 409.
- These sub-grades are stabilized to varying degrees using titanium, niobium, or a combination of the two. Any of these can be certified as S40900 (Grade 409). However, ASTM A268M only lists the standard Grade 409 for tube applications.
Corrosion Resistance:
- Grade 409 offers robust resistance to both atmospheric and exhaust gas corrosion. While a light surface rust may develop in most environments-acting as a protective layer against further corrosion-it is not suitable for cosmetic applications. Its corrosion resistance is on par with 3CR12 and 12% chromium martensitic grades (410), but lower than the 17% chromium grade 430.
Heat Resistance
- 409 stainless steel can withstand scaling in intermittent service up to 815°C and continuous service up to 675°C. However, these temperatures may vary based on the specific service environment.
Heat Treatment
- For annealing, heat to 790-900 degrees Celsius and then cool with air. This grade cannot be hardened by heat treatment.
Welding
- Grade 409 is easy to weld. Pre-heating to 150-260°C is recommended. While Grade 409 or Grade 430 electrodes and filler rods can be used, welding with Grade 309 rods or electrodes is pre-qualified per AS 1554.6. These austenitic fillers yield a more ductile weld.
- Post-weld annealing at 760-815°C enhances weld ductility.
For small sections, post-weld annealing is not required. Automotive exhaust tubing is typically welded autogenously, without filler metal.
To minimize the impacts of grain formation, all welding should be performed with minimal heat input.
Typical Applications
Widely used in automotive exhaust systems, including catalytic converters and mufflers.
Specified Properties
- ASTM A268M outlines the parameters for Grade 409 in annealed tubing. ASTM A240M specifies the composition for additional grades used in coil and sheet applications. Specifications for other items may include similar, but not identical, properties.
Forming:
- 409 stainless steel can be easily cut, blanked, stretch-formed, and drawn. Its formability characteristics are similar to those of carbon steel.
Q1: What products can you offer?
A: We offer a variety of general steel types, including 310S, 316L, 304, 304L, 201, 904L, 316H, 316, and 316L. Additionally, we provide 400 series and duplex stainless steel such as 2205, 2304, 2101, 2507, and high-nickel alloys like 904L, 800H, and 600H.
400 series, and duplex stainless steel like 2205, 2304,2101,2507,etc. 904L, 800H, 600H high-nickel alloy.
Q2. Can you produce the products according to my own drawings?
Yes, we can manufacture products according to your customized drawings, ensuring they meet your satisfaction.
Q3. How does your factory ensure quality control?
Quality is our utmost priority. We rigorously control quality from the beginning to the end of the production process.
Q4. Can I request to change the form of packaging and transportation?
Absolutely! We can customize the packaging and transportation forms to suit your specific needs,
though you will be responsible for any costs and price differences incurred during this period.
Q5. How does your factory handle quality control?
Quality is our top priority. We are committed to rigorous quality control from the very beginning to the final stages.
Q6. What is the delivery timeframe?
A: Typically, it takes 7~20 working days after payment confirmation.
For urgent orders, we expedite the process to ensure quicker completion.
Q7. What are your payment terms?
A: 100% T/T in advance, Western Union (for small orders)
B: 30% T/T upfront and the remaining 70% before shipment
C: 100% Irrevocable LC at sight (for large orders)
Q8: Can you produce DDQ (Deep Drawing Quality) material?
A: Yes, we can. Our material is suitable for stainless steel pots, sinks, bowls, etc. Provide your specific usage, and we will tailor the mechanical properties to meet your requirements.
Q9: How can I obtain a sample?
A: FREE samples are available for your inspection and testing. For small pieces, we can cover the courier cost, depending on the situation.
Q10: To which countries have you exported?
A: To date, we have exported stainless steel materials to Vietnam, Thailand, Turkey, Russia, Morocco, Korea, India, Pakistan, UAE, Ukraine, and more.
Q11: How can I visit your company?
A: Fly to Guangzhou Baiyun International airport, and we will arrange for your pickup.
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