| 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 Pioneer in Stainless Steel Coil Fabrication Services
Type 409 Stainless Steel (UNS S40900) is a stabilized ferritic stainless steel offering superior oxidation and corrosion resistance compared to carbon steel. Its ease of manufacture coupled with its corrosion resistance and cost-effectiveness has significantly elevated its application in automotive exhaust systems and various non-automotive uses. ASTM A240 delineates three (3) subcategories of Type 409 stainless steel: UNS S40910, UNS S40920, and UNS S40930, each with distinct Ti or Nb stabilization requirements. Unless otherwise specified by the purchaser, any of these compositions may be delivered as UNS S40900. This material is produced with enhanced formability properties, commonly referred to in the industry as 'High Performance' or 'Ultra Form.'
Daxun Stainless Steel ensures comprehensive traceability of each coil through its advanced ERP system, covering type, specification, and origin, and actively promotes industry anti-counterfeiting measures. Leveraging cutting-edge technology for precision processing and customization, Daxun Stainless Steel sets the industry benchmark for high quality. In terms of service, Daxun advocates for product life cycle management, providing expert material selection and processing solutions pre-sale, strict monitoring during sales, and reliable service guarantees post-sale.
Quality Assurance, Timely Delivery, Rigorous Inspection
- Daxun conducts a series of stringent quality assurance tests including flattening, pitting and resistance, mechanical, hardness, material positive identification, and expansion tests. These meticulous checks ensure the material meets and exceeds the requirements for its intended application.
- Throughout the production process, we meticulously measure the diameter, thickness, and surface quality of our products. Our standard delivery timeline ranges from 7-15 days, with an extension to 20 days for products of special sizes.
We strictly adhere to contract delivery timelines.
- We welcome third-party agencies to inspect our factory.
- We offer free sample testing for our customers.
- We support both on-site and video factory inspections.
Ordering Information
Purchase orders should specify quantity, grade, type or category, API5L reference, thickness, width, length, and any additional requirements related to chemical composition, mechanical properties, heat treatment, extra testing, manufacturing process, surface coating, or end finish. Contact Daxun today, and we will respond to your inquiry promptly.
Daxun's stainless steel journey commenced in 2003. Over the past two decades, Daxun has solidified its position as a leader in China's stainless steel materials and processing industry through relentless innovation and quality.
For over 20 years, Daxun has been a prominent player in the international market. In 2022 alone, export revenues soared past US$100 million, positioning Daxun among the elite in China's stainless steel trade and processing. We have established three export service bases in China and forged robust alliances with engineering firms, steel mills, and global trading companies to serve international markets. Our commitment to enhancing service capabilities is unwavering as we work diligently to expand our global footprint.
Daxun International offers comprehensive stainless steel chain supermarket services, maintaining enduring partnerships with numerous renowned steel mills worldwide. With an inventory boasting 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, Daxun International guarantees reliable quality and authenticity. Each variety, specification, and delivery weight adheres strictly to industry standards.
Daxun is equipped with advanced steel processing machinery, an expert physical and chemical testing center, and comprehensive processing lines including cutting, grinding, forming, beveling, welding, heat treatment, machining, and spraying.
Our services span across over 30 industries such as automotive, home appliances, elevators, new energy, vacuum semiconductors, food and beverage/bio-fermentation, petrochemicals, and energy equipment. In collaboration with steel mills, research institutes, and other entities, we offer integrated solutions from project design to material development and process optimization.
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 robust mechanical properties, corrosion resistance, and excellent weldability, Grade 409 is predominantly utilized for automotive exhaust systems. This material is ideal for applications where these qualities are prioritized over appearance, especially under high-temperature conditions.
- ASTM requirements, specifically ASTM A240M for flat-rolled steel, now classify S40910, S40920, and S40930 as distinct sub-grades instead of the general Grade 409.
- These sub-grades are stabilized to varying degrees with titanium, niobium, or a combination of both. Each can be certified as S40900 (Grade 409). ASTM A268M lists standard Grade 409 for tubular products.
Corrosion Resistance:
- Grade 409 excels in resisting both atmospheric and exhaust gas corrosion. In most environments, it develops a light surface rust that acts as a protective layer, preventing further corrosion. However, this rust is not suitable for cosmetic applications. Its corrosion resistance is comparable to 3CR12 and 12% chromium martensitic grades (such as Grade 410), but it is lower than the 17% chromium Grade 430.
Heat Resistance
- Grade 409 is resistant to scaling in intermittent service up to 815°C and continuous service up to 675°C. However, these temperature limits may vary depending on the specific service environment.
Heat Treatment
- To anneal, heat Grade 409 to 790-900 degrees Celsius and then air cool. This grade cannot be hardened by heat treatment.
Welding
- Grade 409 is easy to weld, with a recommended pre-heat of 150-260°C. While Grade 409 or Grade 430 electrodes or filler rods can be used, welding with Grade 309 rods or electrodes is pre-qualified per AS 1554.6, producing a more ductile weld.
- Post-weld annealing at 760-815°C improves weld ductility.
Welding small sections does not require post-weld annealing. In automotive exhaust tubing, welding is usually performed without filler metal (autogenously).
To minimize the adverse effects of grain growth, 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 specifies the properties of Grade 409 for annealed tubing. ASTM A240M outlines the composition for additional grades in coil and sheet applications. Specifications for other products may include similar but not identical properties.
FORMING:
- Type 409 stainless steel can be easily 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 general steel types, including 310S, 316L, 304, 304L, 201, 904L, 316H, 316, and 316L 300 series stainless steel.
Additionally, we provide 400 series stainless steel and duplex stainless steels such as 2205, 2304, 2101, and 2507. Our high-nickel alloys include 904L, 800H, and 600H.
Q2. Can you produce the products according to my own drawings?
Yes, we can manufacture products based on your drawings to meet your specific needs and satisfaction.
Q3. How does your factory do regarding quality control?
Quality is our top priority. We consistently place great emphasis on quality control from the very beginning to the end of the production process.
Q4. Can I request to change the form of packaging and transportation?
Absolutely! We are flexible and ready to accommodate your specific packaging and transportation preferences.
However, please note that any additional costs incurred during this period, including the price differences, will be your responsibility.
Q5. How does your factory ensure quality control?
Quality is our top priority. We maintain rigorous quality control measures, ensuring excellence from the initial stages to the final product.
Q6. What is the delivery time?
A: Typically, our delivery time is between 7 to 20 working days after payment confirmation.
For urgent orders, we will expedite the process to meet your timeline.
Q7. What are your payment terms?
A: 100% T/T in advance or Western Union (for small orders).
B: 30% T/T upfront, with the remaining 70% before shipment.
C: 100% Irrevocable LC at sight (for large orders).
Q8: Can you produce DDQ (Deep Drawing Quality) materials?
A: Yes, we specialize in producing DDQ materials suitable for stainless steel pots, sinks, bowls, and more. Share your usage requirements, and we will tailor the mechanical properties to meet your needs.
Q9: How can I obtain a sample?
A: We offer FREE samples for your evaluation. For small pieces, we may cover the courier cost, subject to conditions.
Q10: Which countries have you exported to?
A: We have proudly 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: Simply fly to Guangzhou Baiyun International Airport, and we will arrange for your pick-up from there.
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