| 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 high corrosion resistance and affordability, has significantly boosted its application in automotive exhaust systems and various non-automotive sectors. ASTM A240 outlines three subcategories of Type 409 stainless steel: UNS S40910, UNS S40920, and UNS S40930, each with distinct Ti or Nb stabilization requirements. Unless specified otherwise by the purchaser, any of these compositions may be provided as UNS S40900. This material is engineered with advanced formability properties, recognized in the industry as 'High Performance' or 'Ultra Form.'
Daxun Stainless Steel ensures complete traceability for each stainless steel coil via its ERP system, detailing type, specification, and origin to advocate and encourage industry anti-counterfeiting measures. Leveraging cutting-edge technology for processing and customization, Daxun sets the industry benchmark with unmatched precision and quality. Our service approach embodies product life cycle management, providing expert material selection and processing solutions before sales, rigorous monitoring during sales, and reliable service guarantees post-sales.
Quality, Delivery, Inspection
- Daxun conducts comprehensive quality assurance tests to maintain superior standards. These tests include flattening, pitting and resistance, mechanical, hardness, material positive identification, and expansion tests. These rigorous evaluations ensure the material's suitability for its intended application.
- During production, we meticulously measure the product's diameter, thickness, and surface quality. Our standard delivery time is 7-15 days. For special size products, the delivery period extends to 20 days.
Our delivery schedule strictly adheres to contractual agreements.
- We support inspections by third-party agencies at our factory.
- We offer free samples for customer testing.
- We facilitate on-site or video factory inspections.
Ordering Information
Purchase orders should specify quantity, grade, type or category, API5L reference, thickness, width, length, and any applicable attachments or additional requirements regarding chemical composition, mechanical properties, heat treatment, additional testing, manufacturing process, surface coating, or end finish. Contact Daxun now, and we'll respond to your email promptly.
Daxun's stainless steel business embarked on its journey in 2003. Two decades of swift advancement have positioned its stainless steel materials and processing business firmly at the vanguard of China's industry.
Daxun has been a formidable player in the overseas market for over 20 years. In 2022, our export revenue surpassed an impressive US$100 million, securing our place among the top stainless steel trade and processing companies in China. We have strategically established three export service bases within the country, collaborating with engineering firms, steel mills, and international trading companies to cater to global markets. Our relentless commitment to enhancing service capabilities and expanding our international footprint underscores our unwavering dedication to excellence.
Daxun International offers a comprehensive stainless steel chain supermarket service, boasting long-term collaborations with dozens of renowned steel mills worldwide. With an extensive inventory of 60,000 tons of standard stainless steel and 20,000 tons of specialty metals such as duplex steel, nickel-based alloys, and heat-resistant steel, Daxun International ensures unparalleled quality. Each product variety, specification, and delivery weight adheres strictly to industry standards, guaranteeing authenticity and reliability.
Daxun's state-of-the-art facilities include diverse steel processing equipment, a cutting-edge physical and chemical testing center, and an array of processing lines encompassing cutting, grinding, forming, beveling, welding, heat treatment, machining, and spraying.
Our services span over 30 industries, including automotive, home appliances, elevators, new energy, vacuum semiconductors, food and beverage/bio-fermentation, petrochemicals, and energy equipment. Partnering with steel mills, research institutions, and other entities, we deliver seamless, integrated services from project design and material development to process optimization in manufacturing.
409Stainless 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 titanium-stabilized ferritic stainless steel. Grade 409, a general-purpose chromium stainless steel, is mostly used for automotive exhaust systems. This material is suitable for applications that prioritize mechanical qualities, corrosion resistance, and weldability over appearance, especially at high temperatures.
- ASTM requirements, including ASTM A240M for flat rolled steel, now use S40910, S40920, and S40930 as "sub-grades" instead of generic grade 409.
- These are stabilised to varying degrees with titanium, niobium, or a combination of the two.Any of these could be certified as S40900 (Grade 409). ASTM A268M only lists standard Grade 409 for covering tubes.
Corrosion Resistance:
- Grade 409 is resistant to both atmospheric and exhaust gas corrosion. In most environments, a light surface rust develops, which prevents further corrosion but is not suitable for cosmetic purposes. Corrosion resistance is comparable to 3CR12 and 12% chromium martensitic grades (410), but lower than 17% chromium grade 430.
Heat resistance
- 409 is resistant to scaling in intermittent service up to 815°C and continuous service up to 675°C. However, these temperatures vary according on the specific service environment.
Heat Treatment
- Annealing Heat to 790-900 degrees Celsius and then cool with air. This grade cannot be toughened through heat treatment.
Welding
- Easy to weld, however a pre-heat of 150-260°C is suggested. Although Grade 409 or Grade 430 electrodes or filler rods can be used, welding using Grade 309 rods or electrodes is pre-qualified per AS 1554.6. These austenitic fillers produce a more ductile weld.
- Post-weld annealing at 760-815°C increases weld ductility.
Welding tiny sections does not require post-weld annealing. Automotive exhaust tubing is usually welded without filler metal (autogenously).
To avoid the impacts of grain formation, all welding must be done with as little heat as possible.
Typical Applications
Automotive exhaust systems, such as catalytic converters and mufflers.
Specified Properties
- ASTM A268M specifies the parameters of Grade 409 for annealed tubing. ASTM A240M specifies the composition of additional grades for coil and sheet applications. Other items' specifications may include similar but not identical properties.
FORMING:
- 409 stainless can be cut, blanked stretch formed and drawn without difficulty. The formability characteristics of Type 409 are very similar to carbon steel.
Q1: What products can you offer?
A: We can offer you general steel types like 310S, 316L,304.304L.201,904L, 316H, 316,316L 300and
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 produce the products according to your drawings that will be most satisfy you.
Q3. How does your factory do regarding quality control?
Quality is a priority. We always attach great importance to quality controlling from the beginning to end.
Q4. Can I request to change the form of packaging and transportation?
Certainly! We are flexible in modifying the packaging and transportation methods to align with your specific requirements.
However, please note that any additional costs and price differences incurred during this process will be your responsibility.
Q5. How does your factory ensure top-tier quality control?
Quality is our paramount concern. We consistently prioritize rigorous quality control throughout every production phase, from start to finish.
Q6. What is the standard delivery time for your products?
A: Typically, it takes about 7 to 20 working days after the payment confirmation.
If your order is urgent, we can expedite the process and complete it ahead of schedule.
Q7. What are the available payment options?
A: For small orders, we accept 100% T/T in advance or Western Union.
B: For larger transactions, we accept a 30% T/T deposit with the remaining 70% paid before shipment.
C: For substantial orders, we accept 100% Irrevocable LC at sight.
Q8: Can you manufacture Deep Drawing Quality (DDQ) materials?
A: Absolutely! Our materials can be tailored for deep drawing applications such as stainless steel pots, sinks, and bowls. Just inform us of your specific use, and we will adjust the mechanical properties accordingly.
Q9: How can I obtain a sample?
A: We offer FREE samples for your evaluation and testing. For small pieces, we may also cover the courier costs, depending on the circumstances.
Q10: Which countries have you exported to?
A: To date, we have exported our stainless steel materials to Vietnam, Thailand, Turkey, Russia, Morocco, Korea, India, Pakistan, UAE, Ukraine, and several other countries.
Q11: What is the best way to visit your company?
A: You can fly to Guangzhou Baiyun International Airport, and we will be there to pick you up.
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