| 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 |
Your Global Leader in Premium Stainless Steel Coil Fabrication Services
Type 409 Stainless Steel (UNS S40900) is a high-performance ferritic stainless steel, known for its 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 a variety of other applications. ASTM A240 categorizes Type 409 stainless steel into three subtypes: UNS S40910, UNS S40920, and UNS S40930, each with distinct Ti or Nb stabilization requirements. Unless specified otherwise, any of these compositions may be delivered as UNS S40900. This material is also available in 'High Performance' or 'Ultra Form' variants, offering enhanced formability.
At Daxun Stainless Steel, full traceability of each coil is ensured through our advanced ERP system, covering type, specification, and origin, while actively promoting industry anti-counterfeiting measures. Leveraging cutting-edge technology for processing and customization, Daxun sets the industry benchmark for precision and quality. In terms of service, we advocate for comprehensive product life cycle management, offering expert material selection and processing solutions before sales, meticulous monitoring during sales, and reliable post-sales service guarantees.
Uncompromising Quality, Swift Delivery, Rigorous Inspection
- Daxun carries out stringent quality assurance tests including flattening, pitting resistance, mechanical, hardness, material positive identification, and expansion tests. These rigorous evaluations ensure that our materials meet the highest standards for their intended applications.
- Throughout production, we meticulously measure the diameter, thickness, and surface quality of our products. Standard delivery time ranges from 7-15 days, with special size products extending to 20 days.
Our delivery schedules strictly adhere to contractual agreements.
- We support customer third-party agency inspections at our factory.
- We offer free samples to customers for rigorous testing.
- We facilitate on-site or video factory inspections to ensure transparency and quality.
Seamless Ordering Information
Your purchase orders should detail quantity, grade, type or category, API5L reference, thickness, width, length, and any additional requirements concerning chemical composition, mechanical properties, heat treatment, additional testing, manufacturing process, surface coating, or end finish. Contact Daxun now, and we will respond to your inquiry promptly.
Jiangsu Daxun Alloy Co., Ltd. embarked on its stainless steel journey in 2003. Over the past two decades, Daxun has surged ahead, establishing itself as a pioneer in China's booming stainless steel industry, renowned for its superior materials and advanced processing capabilities.
With over 20 years of international business experience, Daxun's export revenue soared past US$100 million in 2022, ranking it among the elite in China's stainless steel trade and processing sector. Our expansive global network includes three dedicated export service bases in China, forged alliances with engineering giants, steel mills, and global trading firms, all to elevate our services and penetrate global markets.
Daxun International offers a comprehensive stainless steel chain supermarket service and boasts long-standing partnerships with numerous prestigious steel mills worldwide. With a robust inventory of 60,000 tons of standard stainless steel and 20,000 tons of specialty metals like duplex steel, nickel-based alloys, and heat-resistant steel, we guarantee unmatched quality and authenticity. Our diverse range, precise specifications, and reliable delivery uphold the highest industry standards.
Daxun is equipped with state-of-the-art steel processing machinery, a sophisticated physical and chemical testing center, and versatile processing lines for cutting, grinding, forming, beveling, welding, heat treatment, machining, and spraying. These advanced capabilities ensure the highest quality in every processed product.
Our services span over 30 dynamic industries, from automotive and home appliances to new energy and vacuum semiconductors. By partnering with steel mills, research institutes, and other key entities, we deliver comprehensive solutions that encompass project design, material development, and optimization of processing and manufacturing processes, tailored to meet the unique needs of each sector.
409 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 known for its exceptional versatility. 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 prioritized above aesthetics, particularly at elevated temperatures.
- ASTM standards, notably ASTM A240M for flat-rolled steel, now recognize S40910, S40920, and S40930 as 'sub-grades' rather than using the generic term Grade 409.
- These grades are stabilized to varying degrees with titanium, niobium, or a combination of both. Any of these could be certified as S40900 (Grade 409). ASTM A268M specifically lists the standard Grade 409 for tubing applications.
Corrosion Resistance:
- Grade 409 showcases robust resistance to both atmospheric and exhaust gas corrosion. In most conditions, a light surface rust forms, acting as a barrier to further corrosion, though it is not suitable for cosmetic purposes. Its corrosion resistance is comparable to 3CR12 and 12% chromium martensitic grades (410) but is less than the 17% chromium grade 430.
Heat Resistance
- 409 stainless steel can withstand scaling in intermittent service up to 815°C and in continuous service up to 675°C. However, these limits can vary depending on the specific service environment.
Heat Treatment
- For annealing, heat to 790-900 degrees Celsius and then cool in air. Note that this grade cannot be hardened through heat treatment.
Welding
- Grade 409 is easy to weld, but pre-heating to 150-260°C is recommended. While Grade 409 or 430 electrodes or filler rods are suitable, welding with Grade 309 rods or electrodes is pre-qualified under AS 1554.6. These austenitic fillers enhance weld ductility.
- Post-weld annealing at 760-815°C is advised to enhance weld ductility.
Welding thin sections does not require post-weld annealing. Automotive exhaust tubing is typically welded autogenously, without filler metal.
To minimize grain formation impacts, all welding should be performed with minimal heat input.
Typical Applications
Ideal for automotive exhaust systems, including catalytic converters and mufflers.
Specified Properties
- ASTM A268M specifies the properties of Grade 409 for annealed tubing, while ASTM A240M details the composition for coil and sheet applications. Specifications for other items may include similar but not identical properties.
Forming:
- 409 stainless steel can be effortlessly cut, blanked, stretch formed, and drawn. Its formability characteristics are very similar to those of carbon steel.
Q1: What products can you offer?
A: We offer a wide range of steel types including 310S, 316L, 304, 304L, 201, 904L, 316H, 316, 316L, and 300 series.
Additionally, we provide 400 series and duplex stainless steels like 2205, 2304, 2101, 2507, and high-nickel alloys such as 904L, 800H, and 600H.
Q2. Can you produce the products according to my own drawings?
Yes, we have the capability to manufacture products according to your custom drawings to ensure utmost satisfaction.
Q3. How does your factory do regarding quality control?
Quality is our top priority. We consistently emphasize stringent quality control procedures 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 modify the form of packaging and transportation according to your specific requests,
however, you will need to cover any additional costs and variances incurred during this period.
Q5. How does your factory ensure quality control?
Quality is our top priority. We consistently place great emphasis on maintaining superior quality from start to finish.
Q6. What is the typical delivery time?
A: Generally, it takes 7 to 20 working days after payment confirmation.
If the order is urgent, we will expedite production to complete it ahead of schedule.
Q7. What are your payment terms?
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 provide DDQ (Deep Drawing Quality) material?
A: Yes, we can. Our materials are suitable for stainless steel pots, sinks, bowls, etc. Inform us of your specific use, and we will adjust the mechanical properties to meet your requirements.
Q9: How can I obtain a sample?
A: FREE samples are available for your evaluation. For small pieces, we may cover courier costs depending on the situation.
Q10: Which countries have you exported to?
A: To date, we have exported stainless steel materials to countries like Vietnam, Thailand, Turkey, Russia, Morocco, South Korea, India, Pakistan, UAE, Ukraine, and many more.
Q11: How can I visit your company?
A: You can fly to Guangzhou Baiyun International Airport, and we will arrange for your pick-up.
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