| 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 renowned for its exceptional oxidation and corrosion resistance compared to carbon steel. Its ease of manufacture, coupled with its superior corrosion resistance and cost-effectiveness, has significantly boosted its application in automotive exhaust systems and various non-automotive uses. ASTM A240 outlines three (3) subcategories for Type 409 stainless steel: UNS S40910, UNS S40920, and UNS S40930, each with unique Ti or Nb stabilization requirements. If not otherwise specified by the purchaser, any composition within these may be provided as UNS S40900. This material is crafted with enhanced formability attributes known in the industry as "High Performance" or "Ultra Form."
Daxun Stainless Steel ensures full traceability for each stainless steel coil via our ERP system, detailing type, specification, and origin while advocating for industry anti-counterfeiting measures. Leveraging cutting-edge technology for precision processing and customization, we set the industry standard for high quality and precision. Our service model encompasses comprehensive product life cycle management, offering expert material selection and processing solutions pre-sale, stringent quality monitoring during sales, and reliable after-sales service guarantees.
Quality, delivery, inspection
- Daxun conducts a range of rigorous quality assurance tests including flattening tests, pitting and resistance tests, mechanical tests, hardness tests, material positive identification, and expansion tests. These comprehensive tests ensure the material's suitability for its intended applications.
- Throughout the production process, we meticulously measure the diameter, thickness, and surface quality of our products. Our standard delivery timeframe is 7-15 days, with exceptions for certain special-size products, which may extend delivery to 20 days.
Our delivery schedule strictly adheres to the contract terms.
- We support customer third-party agency inspections at our factory.
- We provide free sample testing for customers.
- We offer on-site or video factory inspections.
Ordering Information
Purchase orders should specify the quantity, grade, type or category, API5L reference, thickness, width, length, and any relevant attachments or additional requirements related to chemical composition, mechanical properties, heat treatment, additional testing, manufacturing process, surface coating, or end finish. Contact Daxun now; we will respond to your email promptly.
Daxun's journey in the stainless steel business began in 2003. Over the past two decades of relentless innovation and expansion, Daxun has firmly positioned itself at the pinnacle of China's stainless steel material and processing industry.
For over two decades, Daxun has made remarkable strides in the international arena. In 2022 alone, our export revenue surpassed an impressive US$100 million, positioning us among the elite stainless steel trade and processing firms in China. To better serve our global clients, we have strategically established three export service bases across China. By partnering with leading engineering firms, steel mills, and global trading companies, we are continuously enhancing our service capabilities and expanding our footprint in international markets.
Daxun International is synonymous with excellence, offering comprehensive stainless steel supply services akin to a chain supermarket. Through longstanding partnerships with numerous renowned steel mills worldwide, we maintain a robust inventory of 60,000 tons of standard stainless steel alongside 20,000 tons of specialized metals including duplex steel, nickel-based alloys, and heat-resistant steel. Our commitment to quality is unwavering, ensuring our products meet and often exceed stringent industry standards in variety, specification, and delivery weight.
Equipped with state-of-the-art steel processing machinery and a cutting-edge physical and chemical testing center, Daxun offers a full spectrum of processing services such as cutting, grinding, forming, beveling, welding, heat treatment, machining, and spraying.
Our services span over 30 diverse industries including automotive, home appliances, elevators, new energy, vacuum semiconductors, food and beverage/bio-fermentation, and petrochemicals. Collaborating closely with steel mills and research institutions, we deliver comprehensive solutions from project design and material development to advanced processing and manufacturing optimization.
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. This general-purpose chromium stainless steel is predominantly employed in automotive exhaust systems. It excels in applications where mechanical properties, corrosion resistance, and weldability are paramount, particularly under high-temperature conditions.
- ASTM specifications, including ASTM A240M for flat rolled steel, now classify S40910, S40920, and S40930 as sub-grades, replacing the generic Grade 409.
- These variants are stabilized to different extents with titanium, niobium, or their combination. Any of these can be certified as S40900 (Grade 409). ASTM A268M only acknowledges standard Grade 409 for tubes.
Corrosion Resistance:
- Grade 409 boasts resistance to both atmospheric and exhaust gas corrosion. While a light surface rust forms in most environments to inhibit further corrosion, it's not ideal for cosmetic use. Its corrosion resistance parallels that of 3CR12 and 12% chromium martensitic grades (410) but is inferior to 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 specific service environments may influence these limits.
Heat Treatment
- For annealing, heat to 790-900°C and cool with air. This grade cannot be toughened through heat treatment.
Welding
- Welding is straightforward, though pre-heating to 150-260°C is recommended. While Grade 409 or 430 electrodes or filler rods can be used, Grade 309 rods or electrodes are pre-qualified per AS 1554.6. These austenitic fillers yield a more ductile weld.
- Post-weld annealing at 760-815°C enhances weld ductility.
Welding small sections doesn't require post-weld annealing. Automotive exhaust tubing is typically welded without filler metal (autogenously).
To mitigate grain formation effects, all welding should be performed with minimal heat.
Typical Applications
Automotive exhaust systems, including catalytic converters and mufflers.
Specified Properties
- ASTM A268M details the parameters for annealed tubing of Grade 409. ASTM A240M specifies the composition of additional grades for coil and sheet applications. Specifications for other products may share similar yet distinct properties.
Forming:
- Type 409 stainless steel can be easily cut, blanked, stretch-formed, and drawn. Its formability is akin to carbon steel.
Q1: What products can you offer?
A: We provide various steel types including 310S, 316L, 304, 304L, 201, 904L, 316H, 316, 316L, 300 series.
Additionally, we offer 400 series and duplex stainless steels like 2205, 2304, 2101, 2507, as well as high-nickel alloys such as 904L, 800H, 600H.
Q2: Can you produce products according to my drawings?
Yes, we can manufacture products precisely to your drawings for utmost satisfaction.
Q3: How does your factory handle quality control?
Quality is our top priority. We meticulously manage quality control from inception to completion.
Q4. Can I request to change the form of packaging and transportation?
Absolutely! We can customize the packaging and transportation methods to suit your needs,
provided that you cover any additional costs and the price difference incurred during the process.
Q5. How does your factory handle quality control?
Quality is our top priority. From start to finish, we ensure stringent quality control measures are in place.
Q6. What is the typical delivery time?
A: Standard delivery time is 7 to 20 working days post payment confirmation.
For urgent orders, we will expedite the process to deliver as quickly as possible.
Q7. What are your payment options?
A: 100% T/T in advance, or 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 Deep Drawing Quality (DDQ) materials?
A: Yes, we can. Our materials are suitable for stainless steel pots, sinks, bowls, etc. Let us know your specific use, and we'll tailor the mechanical properties to meet your requirements.
Q9: How can I obtain a sample?
A: Free samples are available for your evaluation. If you need a small piece, we may cover the courier cost, depending on the situation.
Q10: Which countries have you exported to?
A: We have exported stainless steel materials to Vietnam, Thailand, Turkey, Russia, Morocco, Korea, India, Pakistan, UAE, Ukraine, and many more.
Q11: How can I visit your company?
A: Fly into Guangzhou Baiyun International Airport, and we will arrange for your pickup.
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