| 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 |
Global Leader in Stainless Steel Coil Fabrication Services
Type 409 Stainless Steel (UNS S40900) is a stabilized ferritic stainless steel that offers superior oxidation and corrosion resistance compared to carbon steel. Its ease of manufacture, combined with its corrosion resistance and cost-effectiveness, has significantly boosted its usage in automotive exhaust systems and other non-automotive applications. ASTM A240 specifies three subcategories of Type 409 stainless steel: UNS S40910, UNS S40920, and UNS S40930, each having distinct Ti or Nb stabilization requirements. Unless otherwise specified by the purchaser, any of these compositions may be provided as UNS S40900. It is produced with enhanced formability properties, known in the industry as 'High Performance' or 'Ultra Form.'
Daxun Stainless Steel ensures full traceability of each stainless steel coil through our comprehensive ERP system, detailing type, specification, and origin. We advocate for and support industry anti-counterfeiting measures. Leveraging advanced technology for processing and customization, Daxun sets the industry benchmark with high precision and exceptional quality. Our service model promotes product life cycle management, offering expert material selection and processing solutions before sales, stringent monitoring during sales, and unparalleled service guarantees after sales.
Quality, Delivery, Inspection
- At Daxun, we perform several rigorous quality assurance tests, including flattening, pitting and resistance, mechanical, hardness, material positive identification, and expansion tests. These comprehensive tests ensure that the material meets the necessary application requirements.
- During the production process, we meticulously measure the diameter, thickness, and surface quality of each product. Our standard delivery time ranges from 7-15 days. For special size products, the delivery time may extend to 20 days.
Our delivery schedules are strictly adhered to as per the contract.
- We welcome third-party agencies to conduct factory inspections on behalf of our customers.
- We offer free samples to customers for testing purposes.
- We support on-site and video factory inspections to ensure transparency.
Ordering Information
Purchase orders should specify quantity, grade, type or category, API5L reference, thickness, width, length, and any additional requirements regarding chemical composition, mechanical properties, heat treatment, further testing, manufacturing process, surface coating, or end finish. Contact Daxun now; we will respond to your email promptly.
Jiangsu Daxun Alloy Co., Ltd. embarked on its stainless steel journey in 2003. Over the past two decades, the company has catapulted to the forefront of China's stainless steel industry, thanks to its superior materials and precision processing.
With over 20 years of excellence in international business, Daxun has firmly established its global footprint. In 2022 alone, the company surpassed US$100 million in export revenue, securing a top position among China's leading stainless steel trade and processing enterprises. Strategically located export service bases across China empower Daxun to collaborate seamlessly with engineering firms, steel mills, and global trading companies, continually enhancing service capabilities and expanding market reach.
Daxun International offers an unparalleled stainless steel chain supermarket service, backed by enduring partnerships with premier steel mills worldwide. The company boasts an impressive inventory, including 60,000 tons of standard stainless steel and 20,000 tons of specialized metals such as duplex steel, nickel-based alloys, and heat-resistant steel. Renowned for its uncompromising quality, Daxun's materials strictly adhere to industry standards in variety, specification, and delivery weight.
Equipped with advanced steel processing machinery and a state-of-the-art physical and chemical testing center, Daxun excels in a spectrum of processes including cutting, grinding, forming, beveling, welding, heat treatment, machining, and spraying. Each production line reflects Daxun's commitment to precision and excellence.
Daxun's services span over 30 industries such as automotive, home appliances, elevators, new energy, vacuum semiconductors, food and beverage/bio-fermentation, petrochemicals, and energy equipment. By collaborating with steel mills and research institutions, Daxun offers a comprehensive suite of services 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, widely recognized for its versatility and strength. Primarily used in automotive exhaust systems, this grade is ideal for applications that value mechanical properties, corrosion resistance, and weldability over aesthetic appeal, especially at elevated temperatures.
- In compliance with ASTM standards, including ASTM A240M for flat-rolled steel, Grade 409 now encompasses sub-grades S40910, S40920, and S40930, offering tailored solutions for various applications.
- These sub-grades are stabilized to different extents using titanium, niobium, or a combination of both. Each variant can be certified as S40900 (Grade 409) under ASTM A268M, which specifically covers standard Grade 409 tubing.
Corrosion Resistance:
- Grade 409 exhibits commendable resistance to atmospheric and exhaust gas corrosion. Although it may develop a light surface rust in most environments, this layer acts as a barrier against further corrosion. However, it's not suitable for cosmetic purposes. Its corrosion resistance is on par with 3CR12 and 12% chromium martensitic grades (410) but lower than the 17% chromium grade 430.
Heat Resistance
- Grade 409 withstands scaling in intermittent service up to 815°C and continuous service up to 675°C, though these limits can vary based on the specific service environment.
Heat Treatment
- Annealing should be done by heating the material to 790-900°C and cooling it in the air. Note that this grade cannot be hardened through heat treatment.
Welding
- Grade 409 is straightforward to weld, although a pre-heat of 150-260°C is recommended. While you can use Grade 409 or Grade 430 electrodes or filler rods, Grade 309 rods or electrodes are pre-qualified under AS 1554.6 for a more ductile weld.
- Post-weld annealing at 760-815°C enhances weld ductility.
For welding small sections, post-weld annealing is unnecessary. Automotive exhaust tubing is typically welded autogenously, without filler metal.
To minimize the impacts of grain formation, ensure all welding is performed with minimal heat input.
Typical Applications
Grade 409 is commonly used in automotive exhaust systems, including catalytic converters and mufflers.
Specified Properties
- ASTM A268M defines the parameters for annealed Grade 409 tubing, while ASTM A240M specifies the composition for additional grades in coil and sheet applications. Other specifications may include similar but not identical properties.
Forming:
- Grade 409 stainless steel can be effortlessly cut, blanked, stretch-formed, and drawn. Its formability is similar to that of carbon steel.
Q1: What products can you offer?
A: We offer a wide range of general steel types such as 310S, 316L, 304, 304L, 201, 904L, 316H, and 316, along with the 400 series and duplex stainless steels like 2205, 2304, 2101, and 2507. Additionally, we provide high-nickel alloys like 904L, 800H, and 600H.
400 series, and duplex stainless steel like 2205, 2304, 2101, 2507, etc. Additionally, we offer high-nickel alloys like 904L, 800H, and 600H.
Q2. Can you produce the products according to my own drawings?
Yes, we can manufacture products precisely according to your drawings to ensure they meet your exact specifications.
Q3. How does your factory do regarding quality control?
Quality is our utmost priority. We consistently maintain rigorous quality control measures from the beginning of the production process to the final product.
Q4. Can I request to change the form of packaging and transportation?
Absolutely! We can customize the form of packaging and transportation to suit your specific requests.
Please note, however, that you will need to cover any additional costs and differences incurred during this period.
Q5. How does your factory manage quality control?
Quality is our top priority. We are committed to stringent quality control measures from the start to the finish of production.
Q6. How long is the delivery time?
A: Delivery takes 7 to 20 working days after payment confirmation.
If your order is urgent, we will expedite the production process to ensure timely completion.
Q7. What payment methods do you accept?
A: 100% T/T 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 provide DDQ (Deep Drawing Quality)?
A: Yes, we can. Our materials are suitable for stainless steel pots, sinks, bowls, and more. Let us know your specific usage, and we will tailor the mechanical properties to meet your requirements.
Q9: How can I get a sample?
A: Free samples are available for inspection and testing. For small pieces, we may cover the courier cost, depending on the circumstances.
Q10: Which countries have you exported to?
A: We have exported our 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 to pick you up from there.
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