| 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 renowned for its superior oxidation and corrosion resistance compared to carbon steel. Its ease of manufacture, coupled with its affordability and corrosion resistance, has vastly increased its applicability in automotive exhaust systems and various non-automotive applications. The ASTM A240 standard classifies Type 409 stainless steel into three distinct subcategories: 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 may be provided as UNS S40900. This material is often manufactured with enhanced formability properties, known in the industry as 'High Performance' or 'Ultra Form'.
At Daxun Stainless Steel, we ensure complete traceability of each stainless steel coil through our advanced ERP system, covering type, specification, and origin. We are strong advocates of anti-counterfeiting measures in the industry. Leveraging cutting-edge technology for processing and customization, we set the benchmark for high precision and superior quality. Our comprehensive service includes product life cycle management, offering expert material selection and processing solutions pre-sale, stringent monitoring during sales, and reliable after-sales service guarantees.
Quality, Delivery, Inspection
- Daxun Stainless Steel undertakes a series of rigorous quality assurance tests to ensure the suitability of materials for required applications. These tests include flattening tests, pitting and resistance tests, mechanical tests, hardness tests, material positive identification, and expansion tests.
- Throughout the production process, we meticulously measure the diameter, thickness, and surface of each product. Our standard delivery timeframe is 7-15 days, which may extend to 20 days for certain special size products.
Our delivery times strictly adhere to contractual agreements.
- We welcome customer third-party agencies to conduct factory inspections.
- We offer free sample support for customer testing.
- We support both on-site and video factory inspections.
Ordering Information
When placing purchase orders, please include details such as quantity, grade, type or category, API5L reference, thickness, width, length, and any additional requirements regarding chemical composition, mechanical properties, heat treatment, additional testing, manufacturing process, surface coating, or end finish. Contact Daxun today, and we will respond to your inquiry promptly.
Daxun's journey into the stainless steel business began in 2003. Over two decades of rapid advancement has propelled Daxun's stainless steel materials and processing business to the forefront of China's industry.
For over 20 years, Daxun has excelled in overseas markets. In 2022, our export revenue topped US$100 million, placing us among China's leading stainless steel trade and processing companies. We have established three strategic export service bases in China, collaborating with engineering firms, steel mills, and international trading companies to expand our global footprint. Our continuous enhancement of service capabilities has allowed us to better serve the global markets.
Daxun International offers comprehensive stainless steel chain supermarket services through long-term partnerships with renowned steel mills worldwide. We maintain an inventory of 60,000 tons of ordinary stainless steel and 20,000 tons of specialty metals like duplex steel, nickel-based alloys, and heat-resistant steel. Our stainless steel materials are of impeccable quality, strictly adhering to industry standards in variety, specifications, and delivery weights.
At Daxun, we boast an array of steel processing equipment and a state-of-the-art physical and chemical testing center. Our processing lines are equipped for a variety of operations 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 & beverage/bio-fermentation, petrochemicals, and energy equipment. By collaborating with steel mills and research institutes, we offer integrated 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, is a versatile and general-purpose chromium stainless steel. Primarily utilized in automotive exhaust systems, it excels in applications that demand superior mechanical qualities, robust corrosion resistance, and excellent weldability, rather than aesthetic appeal, especially under high-temperature conditions.
- In compliance with ASTM standards, such as ASTM A240M for flat-rolled steel, specific designations like S40910, S40920, and S40930 are now utilized as 'sub-grades' instead of the generic grade 409.
- These sub-grades are stabilized to varying degrees using titanium, niobium, or a combination of both. Each can be certified under S40900 (Grade 409). Notably, ASTM A268M designates the standard Grade 409 for tubing.
Corrosion Resistance:
- Grade 409 demonstrates resilience against atmospheric and exhaust gas corrosion. Typically, a light surface rust forms which halts further corrosion, although this rust isn't suited for cosmetic uses. Its corrosion resistance is similar to 3CR12 and 12% chromium martensitic grades like 410, but falls short of the 17% chromium grade 430.
Heat resistance
- Grade 409 withstands scaling in intermittent service up to 815°C and in continuous service up to 675°C. These temperature thresholds can vary depending on the specific service environment.
Heat Treatment
- For annealing, heat to 790-900°C, then cool with air. Note that this grade cannot be hardened through heat treatment.
Welding
- 409 stainless steel is easy to weld. Pre-heating at 150-260°C is recommended. While Grade 409 or Grade 430 electrodes or filler rods can be used, Grade 309 rods or electrodes are pre-qualified per AS 1554.6, creating a more ductile weld.
- Post-weld annealing at 760-815°C can enhance weld ductility.
Small section welding typically doesn't require post-weld annealing. Automotive exhaust tubing is often welded without filler metal (autogenously).
To minimize grain formation issues, conduct all welding with minimal heat input.
Typical Applications
Ideal for automotive exhaust systems, including catalytic converters and mufflers.
Specified Properties
- ASTM A268M outlines the parameters for Grade 409 annealed tubing, while ASTM A240M specifies additional grades for coil and sheet applications. Specifications for other products might include similar but not identical properties.
FORMING:
- Type 409 stainless steel can be easily cut, blanked, stretched, and drawn. Its formability is very akin to that of carbon steel.
Q1: What products can you offer?
A: We can supply a variety of steel types, including 310S, 316L, 304, 304L, 201, 904L, 316H, 316, 316L, and more.
Additionally, we offer the 400 series and duplex stainless steels like 2205, 2304, 2101, 2507, etc., as well as high-nickel alloys such as 904L, 800H, and 600H.
Q2. Can you produce the products according to my own drawings?
Yes, we can manufacture products that precisely follow your drawings to ensure your utmost satisfaction.
Q3. How does your factory do regarding quality control?
Quality is our top priority. We maintain stringent quality control measures from the beginning to the end of the production process.
Q4. Can I request to change the form of packaging and transportation?
Certainly! We can adapt the form of packaging and transportation to suit your specific requests,
however, please note that any additional costs incurred during this period, including the spreads, will be borne by you.
Q5. How does your factory approach 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.
Q6. What is the typical delivery time?
A: Generally, it takes 7 to 20 working days after payment confirmation.
For urgent orders, we will expedite the process to complete production ahead of schedule.
Q7. What are your payment options?
A: 100% T/T in advance, or Western Union for small orders.
B: 30% T/T upfront, with the remaining 70% due before shipment.
C: 100% Irrevocable LC at sight for large orders.
Q8: Are you capable of producing DDQ (Deep Drawing Quality)?
A: Yes, we specialize in that. Our materials are suitable for making stainless steel pots, sinks, bowls, etc. Simply tell us your specific application, and we will fine-tune the mechanical properties to meet your requirements.
Q9: How can I obtain a sample?
A: We offer FREE samples for your evaluation and testing. If you require only a small piece, we may cover the courier cost, 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 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 from there.
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