| 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 boasts superior oxidation and corrosion resistance compared to carbon steel. Its ease of manufacture, combined with impressive corrosion resistance and cost-effectiveness, has significantly increased its adoption in automotive exhaust systems and various non-automotive applications. ASTM A240 classifies Type 409 stainless steel into three subcategories: UNS S40910, UNS S40920, and UNS S40930, each with distinct Ti or Nb stabilization specifications. Unless otherwise specified by the purchaser, any of these compositions may be supplied as UNS S40900. This material is manufactured with enhanced formability properties referred to as "High Performance" or "Ultra Form" in the industry.
Daxun Stainless Steel ensures the full traceability of each stainless steel coil via a comprehensive ERP system, detailing the type, specification, and origin. We advocate for industry anti-counterfeiting measures and leverage advanced technology for processing and customization, establishing high precision and quality as the industry benchmark. Our service framework emphasizes product lifecycle management, offering expert material selection and processing solutions before sales, stringent monitoring during sales, and impeccable service guarantees post-sales.
Quality, Delivery, Inspection
- Daxun also conducts a series 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 that the material meets the stringent requirements for its intended applications.
- During our production process, we meticulously measure the diameter, thickness, and surface of each product. Our standard delivery timeframe is 7-15 days; however, for special-size products, the delivery period may extend to 20 days.
Our delivery time strictly adheres to the contractual agreements.
- Support for customer third-party agencies to conduct factory inspections
- Support for providing free samples to customers for testing purposes
- Support for 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 applicable attachments or additional requirements related to chemical composition, mechanical properties, heat treatment, additional testing, manufacturing process, surface coating, or end finish. Contact Daxun today, and we will respond to your email promptly.
Daxun's foray into the stainless steel industry commenced in 2003. Over two decades of accelerated growth have positioned its stainless steel materials and processing divisions at the pinnacle of China's industry.
With over 20 years of experience in international trade, Daxun's export revenue shattered the US$100 million mark in 2022, placing it among China's top stainless steel trade and processing enterprises. We have established three dedicated export service bases in China, forging partnerships with engineering companies, steel mills, and international trading entities to cater to global markets. Our relentless drive to enhance service capabilities ensures we remain a leader in providing comprehensive solutions for our international clientele.
Daxun International offers unparalleled stainless steel chain supermarket services, collaborating with a vast network of renowned steel mills worldwide. Our inventory boasts 60,000 tons of conventional stainless steel alongside 20,000 tons of specialized metals such as duplex steel, nickel-based alloys, and heat-resistant steel. Our commitment to quality ensures that all materials are authentic and adhere strictly to industry standards in terms of 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 variety of processing techniques including cutting, grinding, forming, beveling, welding, heat treatment, machining, and spraying.
Our services span more than 30 industries such as automotive, home appliances, elevators, new energy, vacuum semiconductors, food & beverage/bio-fermentation, petrochemicals, and energy equipment. Collaborating with steel mills and research institutions, we deliver comprehensive solutions from project design and material development to 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, a titanium-stabilized ferritic stainless steel, stands out as a general-purpose chromium stainless steel. Primarily utilized for automotive exhaust systems, it excels in mechanical qualities, corrosion resistance, and weldability, especially at high temperatures, making it a top choice for demanding applications.
- ASTM requirements, including ASTM A240M for flat-rolled steel, now categorize S40910, S40920, and S40930 as "sub-grades" instead of the generic Grade 409.
- These sub-grades are stabilized to different extents using titanium, niobium, or a combination of both. Any of these can be certified as S40900 (Grade 409). ASTM A268M specifies the standard Grade 409 for tube applications.
Corrosion Resistance:
- Grade 409 exhibits robust resistance to both atmospheric and exhaust gas corrosion. In most environments, a light surface rust forms that prevents further corrosion, though it may be unsuitable for cosmetic purposes. It offers corrosion resistance comparable to 3CR12 and 12% chromium martensitic grades (410), but is less resistant than the 17% chromium grade 430.
Heat Resistance
- Grade 409 resists scaling in intermittent service up to 815°C and in continuous service up to 675°C, although these temperatures can vary based on the specific service environment.
Heat Treatment
- The annealing process involves heating to 790-900 degrees Celsius, followed by air cooling. This grade cannot be toughened via heat treatment.
Welding
- Grade 409 is easy to weld, with a recommended pre-heat of 150-260°C. While Grade 409 or 430 electrodes or filler rods can be used, welding with Grade 309 rods or electrodes is pre-qualified per AS 1554.6, resulting in a more ductile weld.
- Post-weld annealing at 760-815°C enhances weld ductility.
Welding small sections does not require post-weld annealing. Automotive exhaust tubing is generally welded without filler metal (autogenously).
To mitigate the effects of grain formation, it's crucial to weld with minimal heat.
Typical Applications
Grade 409 is widely used in automotive exhaust systems, including catalytic converters and mufflers.
Specified Properties
- ASTM A268M outlines the parameters for annealed Grade 409 tubing, while ASTM A240M specifies the composition for coil and sheet applications. Specifications for other items may feature similar but not identical properties.
FORMING:
- Grade 409 stainless steel can be effortlessly cut, blanked, stretch-formed, and drawn. Its formability characteristics closely resemble those of carbon steel.
Q1: What products can you offer?
A: We offer a variety of general steel types such as 310S, 316L, 304, 304L, 201, 904L, 316H, 316, 316L, and the entire 400 series. Additionally, we provide duplex stainless steel like 2205, 2304, 2101, 2507, and high-nickel alloys such as 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 precisely according to your drawings to ensure full satisfaction.
Q3. How does your factory do regarding quality control?
Quality is our top priority. We consistently emphasize stringent quality control from start to finish.
Q4. Can I request to change the form of packaging and transportation?
Absolutely! We can customize the packaging and transportation forms to perfectly suit your needs.
However, please note that any additional costs and differences incurred during this process will be your responsibility.
Q5. How does your factory ensure impeccable quality control?
Quality is our utmost priority. From inception to completion, we place significant emphasis on maintaining superior quality.
Q6. How long does delivery take?
A: The delivery period is typically 7 to 20 working days after payment confirmation.
For urgent orders, we will expedite the process and prioritize your request in our workshop.
Q7. What are your payment terms?
A: 100% T/T in advance, or Western Union for smaller orders.
B: 30% T/T upfront with the remaining 70% due before shipment.
C: 100% Irrevocable LC at sight for larger orders.
Q8: Can you produce DDQ (Deep Drawing Quality)?
A: Yes, we specialize in this. Our materials are perfect for producing stainless steel pots, sinks, bowls, etc. Share your specific requirements, and we will tailor the mechanical properties accordingly.
Q9: How can I obtain a sample?
A: We offer FREE samples for your evaluation. For small pieces, we can cover the courier cost, depending on the situation.
Q10: Which countries have you exported to?
A: We have proudly exported our stainless steel materials to countries including Vietnam, Thailand, Turkey, Russia, Morocco, Korea, India, Pakistan, UAE, Ukraine, and many 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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