| 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 celebrated for its superior oxidation and corrosion resistance compared to carbon steel. Its ease of manufacture, combined with its exceptional corrosion resistance and cost-effectiveness, has significantly boosted its usage in automotive exhaust systems and various non-automotive applications. ASTM A240 outlines three subcategories of Type 409 stainless steel: UNS S40910, UNS S40920, and UNS S40930. Each designation features unique Ti or Nb stabilization requirements, but unless specified otherwise, any of these compositions may be delivered as UNS S40900. Additionally, it boasts enhanced formability traits, widely recognized in the industry as 'High Performance' or 'Ultra Form.'
Daxun Stainless Steel ensures full traceability of each stainless steel coil via an advanced ERP system, documenting type, specification, and origin, while vigorously promoting industry anti-counterfeiting practices. Leveraging cutting-edge technology, Daxun sets the industry benchmark for precision and quality in processing and customization. Our comprehensive service model spans product life cycle management, encompassing professional material selection and processing solutions pre-sale, stringent monitoring during sales, and unparalleled post-sale service guarantees.
Quality, Delivery, Inspection
- Daxun rigorously conducts a suite of quality assurance tests, including flattening, pitting and resistance, mechanical, hardness, material positive identification, and expansion tests. These comprehensive evaluations ensure the material's suitability for its intended applications.
- Throughout the production process, we meticulously measure the product's diameter, thickness, and surface quality. Our standard delivery time ranges from 7 to 15 days, though for special size products, delivery may extend up to 20 days.
Our delivery time adheres strictly to contractual agreements.
- We support customer third-party inspections 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 related 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.
Daxun's stainless steel journey began in 2003. Over the past two decades of swift advancement, our stainless steel materials and processing business have consistently led the Chinese industry.
With over 20 years in global trade, Daxun's export revenue surpassed US$100 million in 2022, positioning us among the leading stainless steel trade and processing enterprises in China. We have established three dedicated export service bases across the country. Partnering with engineering firms, steel mills, and international trading companies, we are committed to serving overseas markets. Our relentless focus on enhancing service capabilities ensures we meet and exceed the needs of our global clientele.
Daxun International offers comprehensive stainless steel supermarket services, boasting long-term partnerships with numerous renowned steel mills worldwide. Our inventory holds 60,000 tons of standard stainless steel and 20,000 tons of specialized metals, including duplex steel, nickel-based alloys, and heat-resistant steel. We guarantee the authenticity and quality of our stainless steel materials, adhering strictly to specified varieties, specifications, and delivery weights.
Daxun is equipped with a diverse array of steel processing machinery, a cutting-edge physical and chemical testing center, and advanced processing lines including cutting, grinding, forming, beveling, welding, heat treatment, machining, and spraying.
Our services span over 30 industries such as automotive, home appliances, elevators, new energy, vacuum semiconductors, food and beverage/bio-fermentation, petrochemicals, and energy equipment. Collaborating with steel mills and research institutions, we offer 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 a high-performance, titanium-stabilized ferritic stainless steel. Renowned for its versatility, Grade 409 is predominantly utilized in automotive exhaust systems. This material excels in applications where mechanical properties, corrosion resistance, and weldability are prioritized over aesthetics, especially at elevated temperatures.
- ASTM requirements, notably ASTM A240M for flat rolled steel, have evolved to utilize S40910, S40920, and S40930 as specialized 'sub-grades' instead of the conventional Grade 409.
- These sub-grades are stabilized to varying extents with titanium, niobium, or a combination of both. Each can be certified as S40900 (Grade 409). ASTM A268M exclusively lists standard Grade 409 for tube applications.
Corrosion Resistance:
- Grade 409 offers commendable resistance to both atmospheric and exhaust gas corrosion. While a thin layer of surface rust may develop in most environments, it acts as a barrier to further corrosion but may not be ideal for cosmetic applications. Its corrosion resistance is comparable to Grade 3CR12 and 12% chromium martensitic grades like 410, though it is inferior to the 17% chromium Grade 430.
Heat Resistance
- Grade 409 exhibits impressive resistance to scaling, withstanding intermittent service temperatures up to 815°C and continuous service temperatures up to 675°C. These thresholds may vary depending on the specific service environment.
Heat Treatment
- For annealing, heat Grade 409 to 790-900°C and cool in air. Note that this grade cannot be hardened through heat treatment.
Welding
- Grade 409 is highly weldable, though pre-heating to 150-260°C is recommended. While Grade 409 or 430 electrodes/filler rods can be used, utilizing Grade 309 rods or electrodes is pre-approved per AS 1554.6, resulting in a more ductile weld.
- Post-weld annealing between 760-815°C significantly enhances weld ductility.
Welding small sections does not necessitate post-weld annealing. Typically, automotive exhaust tubing is welded autogenously, without filler metal.
To mitigate grain formation, ensure all welding is conducted with minimal heat input.
Typical Applications
Ideal for automotive exhaust systems, including catalytic converters and mufflers.
Specified Properties
- ASTM A268M outlines the specifications for annealed tubing made from Grade 409. ASTM A240M delineates the composition for other grades used in coil and sheet applications. Specifications for different items may share similarities but are not identical.
FORMING:
- Grade 409 stainless steel can be effortlessly cut, blanked, stretch-formed, and drawn. Its formability characteristics are closely aligned with 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, as well as high-nickel alloys such as 904L, 800H, and 600H.
Q2: Can you produce the products according to my drawings?
Yes, we can manufacture products tailored to your drawings to ensure your utmost satisfaction.
Q3: How does your factory handle quality control?
Quality is our top priority. We consistently emphasize rigorous quality control from start to finish.
Q4: Can I request changes to the packaging and transportation methods?
Absolutely! We can tailor the packaging and transportation forms according to your specific needs,
however, you will need to cover any additional costs and differences that may arise during this period.
Q5. How does your factory handle quality control?
Quality is our utmost priority. We consistently place great emphasis on stringent quality control 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 the process to complete it ahead of schedule.
Q7. What are your payment terms?
A: 100% T/T in advance, Western Union (for small orders)
B: 30% T/T in advance and the remaining 70% before shipment
C: 100% Irrevocable LC at sight (for large orders)
Q8: Can you provide DDQ (Deep Drawing Quality) materials?
A: Certainly! Our material is suitable for stainless steel pots, sinks, bowls, etc. Let us know your specific application, and we will adjust the mechanical properties to meet your requirements.
Q9: How can I obtain a sample?
A: FREE samples are available for evaluation and testing. If you need a small piece, we can cover the courier cost, depending on the situation.
Q10: Which countries have you exported to?
A: We have exported stainless steel material to Vietnam, Thailand, Turkey, Russia, Morocco, Korea, India, Pakistan, UAE, Ukraine, and many more.
Q11: How can I visit your company?
A: Fly to Guangzhou Baiyun International Airport, and we will arrange to pick you up.
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