| 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 |
A Global Leader 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 impressive corrosion resistance and cost-effectiveness, has significantly enhanced its adoption in automotive exhaust systems and a variety of other applications. ASTM A240 details three (3) subcategories of Type 409 stainless steel: UNS S40910, UNS S40920, and UNS S40930, each with specific Ti or Nb stabilization requirements. Unless otherwise specified by the purchaser, any of these compositions can be supplied as UNS S40900. This alloy is also available with enhanced formability properties, commonly known in the industry as 'High Performance' or 'Ultra Form'.
Daxun Stainless Steel ensures full traceability for each stainless steel coil through their advanced ERP system, covering type, specification, and origin. The company champions industry anti-counterfeiting measures. Daxun Stainless Steel sets the industry benchmark with cutting-edge technology for processing and customization, achieving high precision and superior quality. In terms of service, they emphasize product life cycle management, offer expert material selection and processing solutions pre-sale, maintain rigorous oversight during sales, and provide comprehensive service guarantees post-sale.
Commitment to Quality, On-Time Delivery, and Thorough Inspection
- Daxun performs 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 thorough evaluations confirm that the material meets all application requirements.
- Throughout the production process, we meticulously measure the diameter, thickness, and surface of each product. Standard delivery time ranges from 7-15 days. For special-sized products, the delivery timeframe extends to 20 days.
Our delivery schedule strictly adheres to the contractual agreement.
- We welcome third-party inspections at our factory, ensuring transparency and quality.
- We offer free samples to customers for testing purposes.
- We support on-site or video factory inspections to meet customer needs.
Ordering Information
Purchase orders should include quantity, grade, type or category, API5L reference, thickness, width, length, and any specific requirements related to 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.
Daxun's stainless steel journey commenced in 2003. Over two decades of dynamic growth have propelled our stainless steel materials and processing business to the pinnacle of China's industry.
For more than 20 years, Daxun has excelled in overseas business. In 2022 alone, our export revenue surpassed US$100 million, positioning us among the elite in China's stainless steel trade and processing sector. With three export service bases strategically located in China, we collaborate with engineering firms, steel mills, and international trading companies to effectively serve and expand in global markets.
Daxun International offers a comprehensive stainless steel chain supermarket service, boasting long-term partnerships with renowned steel mills worldwide. Our extensive inventory includes 60,000 tons of standard stainless steel and 20,000 tons of specialty metals like duplex steel, nickel-based alloys, and heat-resistant steel. The quality of our stainless steel materials is impeccable and authentic, with varieties, specifications, and delivery weights meticulously conforming to stringent standards.
Equipped with advanced steel processing equipment and a state-of-the-art physical and chemical testing center, Daxun offers a variety of processing lines including cutting, grinding, forming, beveling, welding, heat treatment, machining, and spraying.
Our services span over 30 industries such as automobiles, home appliances, elevators, new energy, vacuum semiconductors, food and beverage/bio-fermentation, petrochemicals, and energy equipment. Partnering with steel mills and research institutes, we deliver comprehensive solutions from project design and material development to processing and manufacturing process 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, is a versatile chromium-based material renowned for its exceptional use in automotive exhaust systems. Prioritizing mechanical strength, corrosion resistance, and weldability, Grade 409 is ideal for high-temperature applications where appearance is secondary.
- In alignment with ASTM standards, including ASTM A240M for flat-rolled steel, sub-grades S40910, S40920, and S40930 now replace the generic Grade 409, offering more specialized material options.
- These sub-grades are stabilized to varied extents using titanium, niobium, or a combination of both. Any of these sub-grades can be certified under S40900 (Grade 409). However, ASTM A268M lists the standard Grade 409 exclusively for tubing.
Corrosion Resistance:
- Grade 409 exhibits robust resistance to atmospheric and exhaust gas corrosion. While a protective layer of light surface rust may develop in most environments, it effectively prevents further corrosion. This characteristic makes it unsuitable for cosmetic purposes but comparable to 3CR12 and 12% chromium martensitic grades (410), though its resistance is lower than that of 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. These limits can vary based on specific service conditions, ensuring the material's adaptability in high-temperature settings.
Heat Treatment:
- Annealing: Heat the material to 790-900 degrees Celsius, then cool it with air. Note that this grade cannot be toughened through heat treatment.
Welding:
- Grade 409 is easily weldable; a pre-heat of 150-260°C is advisable for optimal results. While Grade 409 or Grade 430 electrodes or filler rods can be utilized, Grade 309 rods or electrodes are pre-qualified per AS 1554.6, yielding a more ductile weld.
- Post-weld annealing at 760-815°C enhances weld ductility, ensuring superior performance.
For welding small sections, post-weld annealing is not necessary. Automotive exhaust tubing is typically welded without filler metal (autogenously).
To mitigate grain formation, maintain minimal heat during all welding processes.
Typical Applications:
Primarily used for automotive exhaust systems, including catalytic converters and mufflers. Its properties make it ideal for these demanding applications.
Specified Properties:
- ASTM A268M specifies the parameters for annealed Grade 409 tubing, while ASTM A240M delineates the composition for other grades in coil and sheet applications. Specifications for additional items may exhibit similar but not identical properties.
FORMING:
- Grade 409 stainless steel can be easily cut, blanked, stretch-formed, and drawn, displaying formability characteristics akin to carbon steel.
Q1: What products can you offer?
A: We offer a comprehensive range of general steel types, including 310S, 316L, 304, 304L, 201, 904L, 316H, 316, and 316L 300 series.
Additionally, we provide 400 series and duplex stainless steels such as 2205, 2304, 2101, and 2507, along with 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, ensuring they meet your utmost satisfaction.
Q3. How does your factory do regarding quality control?
Quality is our top priority. We implement stringent quality control measures from start to finish to ensure superior product standards.
Q4. Can I request to change the form of packaging and transportation?
Yes, we can customize the packaging and transportation methods according to your specific requirements.
Please note that you will be responsible for any additional costs and price differences incurred during this customization process.
Q5. How does your factory ensure quality control?
Quality is our top priority. We emphasize stringent quality control measures throughout the entire production process, from inception to completion.
Q6. What is the typical delivery time?
A: Generally, the delivery time is between 7 to 20 working days after payment confirmation.
In the case of urgent orders, we can expedite production to meet your timeline.
Q7. What payment methods do you accept?
A: 100% T/T in advance or Western Union for small orders.
B: 30% T/T in advance with the balance 70% paid before shipment.
C: 100% Irrevocable LC at sight for large orders.
Q8: Can you provide Deep Drawing Quality (DDQ) material?
A: Yes, we can. Our DDQ material is ideal for stainless steel pots, sinks, bowls, and more. Inform us of your specific application, and we will 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 can cover the courier cost, depending on the situation.
Q10: To which countries have you exported your products?
A: We have exported 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: You can fly to Guangzhou Baiyun International Airport, and we will arrange to pick you up.
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