347 Stainless Steel Coil

347 stainless steel is an austenitic chromium alloy stabilized with columbium, designed to prevent carbide precipitation and minimize the risk of intergranular corrosion.

  • Place of Origin: Guangdong ,China(Mainland)
  • Payment Term: L/C At Sight 100%, T/T 30%
  • Delivery Time: Stock goods 7-15 days, Future goods within 25 days
  • Package Detail : Standard Sea-Worthy Packing
  • Price Term: EXW, FOB, CFR, CIF
  • Sample: Free
  • Mill Origin: Tisco, Posco, Aoxing, etc.
  • Certificate: SGS, BV, IQI, TUV, ISO, etc
  • Grade : Grade 347, X8CrNiNb16-10, Z6CNNb18.10, AISI 347, SUS 347, 1.4550, UNS S34700, X6CrNiNb18-10
  • Finish: 2B, No.1, 1D, 2D, BA+PVC, No.4+PVC, Hairline+PVC, 8K/No.8, etc.
  • Thickness: 0.22-15.0mm
  • Width: 20-1540mm
  • Weight Per Coil: 5/10/20MT or customized
  • Stainless Steel Coil Edge: Slit Edge/ Mill Edge
  • Product Detail

    Product Tags

    SUS 304 Mirror 8K Stainless Steel Coil (1)

    What is 347 Stainless Steel Coil?

    SUS 304 Mirror 8K Stainless Steel Coil (3)

    347 stainless steel is an austenitic alloy distinguished by its niobium content, which essentially enhances the base composition of 304 stainless steel. Niobium, a rare earth element akin to titanium, is incorporated into the steel to enhance its grain refinement, boost its strength, and uphold its plasticity, allowing for thinner material use without compromising structural integrity. This addition effectively prevents intergranular corrosion and bolsters the material's resistance to a range of corrosive environments, including acids, alkalis, and salts. Furthermore, 347 stainless steel maintains robust oxidation resistance and weldability up to 800°C, surpassing 304 stainless steel with superior performance in high-temperature conditions, including stress rupture and creep resistance.

    Features of 347 Stainless Steel Coil

    Corrosion Resistance: Exhibits outstanding corrosion resistance, on par with the well-regarded 304 stainless steel, making it suitable for various corrosive environments.

    Temperature Resilience: Effectively prevents chromium carbide precipitation and offers excellent resistance to intergranular corrosion, particularly effective in the temperature range of 427°C to 816°C.

    High-Temperature Strength: Maintains reliable creep resistance under high-temperature conditions, up to 816°C, even in oxidizing environments, demonstrating its robustness for high-temperature applications.

    Workability: Known for its ease of forming and welding, facilitating versatile applications and manufacturing processes.

    Low-Temperature Toughness: Retains significant toughness at low temperatures, ensuring durability and stability across a broad temperature spectrum.

    In essence, while 347 stainless steel shares similarities with the 321 variant, it provides distinct advantages, particularly in its enhanced high-temperature performance and intergranular corrosion resistance, making it a preferable choice for certain demanding applications.

    347 Stainless Steel Chemical Composition & Technical Data Sheet

    347 Stainless Steel Standards Comparison

    347 347 S34700 0Cr18Ni11Nb  1.4550 X6CrNiNb18-10 08Ch18N12B X8CrNiNb16-10 SUS 347

    347 Stainless Steel Chemical Composition

    Grade Standard Chemical Composition(%)
    C Si Mn P S Cr Ni Nb
    347 ASTM A240 ≤0.08 ≤0.75 ≤2.00 ≤0.045 ≤0.030 17.00~19.00 9.00~13.00 10*C%~1.00

    347 Stainless Steel Mechanical Properties

    Grade Standard Tensile Test Hardness Test
    0.2% Y.S(Mpa) T.S(Mpa) Elongation(%) Hardness HRB
    347 ASTM ≥205 ≥515 ≥40 Annealed ≤92

    347 Stainless Steel Finish & Application

    SUS 304 Mirror 8K Stainless Steel Coil (1)

    Applications of 347 Stainless Steel:

    347 stainless steel is widely chosen for manufacturing equipment that demands high resistance to severe corrosive environments, often found in petroleum refining. Its applications are varied, reflecting its robustness in challenging conditions:

    High-Temperature Chemical Processing: Ideal for use in environments where chemical reactions are conducted at high temperatures.

    Heat Exchanger Tubes: Preferred for its reliability in heat exchange applications, where it resists corrosion even at elevated temperatures.

    High-Temperature Steam Services: Suitable for systems requiring endurance in high-temperature steam conditions.

    High-Pressure Steam Pipes: Utilized in areas where steam must be transported at high pressures and temperatures, ensuring structural integrity.

    Radiant Superheaters: Chosen for components within superheaters that operate in radiant heating zones, providing durability under intense heat.

    Boiler Tubes: Applied in boilers where it contributes to the overall efficiency and safety of the system.

    Exhaust Systems: Used in heavy-duty exhaust systems where high temperature and corrosion resistance are essential.

    General Refinery Piping: Common in refinery piping, valued for its strength and corrosion resistance in a variety of petrochemical applications.

    347 Stainless Steel Coil Package & Loading Details

    201 stainless steel coil packing detail
    201 stainless steel coil packing 1
    201 stainless steel coil packing 2

    Why Choose Us?


    We are the cold-rolled stainless steel coil production base in China with 200,000 tons capacity annually.

    1. Guaranteed Stock Availability: Experiencing stock shortages during crucial times can hinder your projects. Our robust inventory management ensures a consistent supply, ready to dispatch large quantities swiftly, keeping your operations smooth and uninterrupted.

    2. Comprehensive Range of Specifications: Finding the exact stainless steel coil specifications can be challenging. We offer a diverse range of specs, ensuring you find precisely what your project demands, with the assurance of our commitment to meeting your specific needs.

    3. Customized Material Processing: Custom processing needs can be demanding. Our advanced facilities provide tailored solutions, from precise dimension alterations to specific finish treatments, ensuring your requirements are met with utmost precision.

    4. Accurate Shearing Services: Precision is key in stainless steel utilization, and our expert shearing services guarantee exactness in every cut, aligning perfectly with your specifications and quality expectations.

    5. Cost-effectiveness is crucial in supplier selection. Our optimized procurement and cost-efficient processes ensure you receive not just premium-quality products but also the best prices, offering exceptional value for your investment.


    347 Stainless Steel Coil FAQ

    1. Can you provide custom 347 stainless steel?

    Absolutely, we tailor aisi 347 stainless steel to your needs, ensuring your specifications for thickness, width, and physical properties are met.


    2. What's the delivery timeline?

    Quick delivery for trial orders within a week, while regular orders range from 7-30 days.


    3. How do you guarantee your ss347 product quality?

    Our ss347 products undergo rigorous inspections during manufacturing, cutting, and packaging to ensure the highest quality. And ss347 mill test certificate is also provided.


    4.  Can I get some 347 alloy samples?

    We can provide 347 alloy samples for you to check the quality. Sample is free and you just pay the freight.


    5. 304 vs 347 stainless steel, what's difference between them?

    What distinguishes 304 stainless steel from 347?

    304 stainless steel is renowned for its broad utility and excellent general corrosion resistance. However, it tends to undergo carbide precipitation when exposed to elevated temperatures, which can compromise its structural integrity. In contrast, 347 stainless steel has been specially formulated to counteract this vulnerability, offering enhanced resistance to carbide precipitation. This makes it particularly well-suited for high-temperature environments and applications that require extensive welding.

    Why choose 347 stainless steel over 304?
    The selection between 304 and 347 stainless steel hinges on the specific conditions your application must endure. If your project is likely to encounter high temperatures or requires considerable welding, 347 stainless steel is the recommended choice due to its superior resistance to intergranular corrosion and its ability to maintain integrity in high-temperature settings. Its composition is tailored to thrive where 304 might falter, particularly in prolonged exposure to high temperatures or intensive welding scenarios.


    6. How to choose a 347 stainless steel supplier?

    Selecting a supplier for 347 stainless steel coils involves a series of steps to ensure quality and reliability:

    Research Suppliers: Utilize online resources to identify reputable suppliers specializing in stainless steel, focusing on those with a strong industry presence and positive reviews.

    Engage with Suppliers: Contact the suppliers to discuss their 347 stainless steel coil offerings, including specifications, pricing, and availability. Consider requesting samples for quality assessment.

    Assess Credibility: Evaluate the suppliers' credibility by reviewing their business credentials, certifications, and customer feedback, ensuring they adhere to industry standards and best practices.

    Compare Quotations: Solicit and compare quotes from various suppliers, clarifying your specific needs such as quantity, specifications, and delivery details to make an informed decision.

    Verify Quality Assurance: Investigate the suppliers' quality control processes and request relevant test reports or certifications to confirm the coils meet your required standards.

    Negotiate Terms: Discuss and negotiate key terms, including pricing, delivery, and payment conditions, ensuring they align with your requirements.

    Order Placement: Finalize the purchase by confirming the order details, such as the coil specifications, quantities, and agreed terms.

    Arrange Payment: Agree on a secure payment method that suits both parties, ensuring all financial terms are clear and documented.

    Coordinate Shipping: Organize the logistics, including packaging, shipping, and customs clearance, to ensure the coils are delivered as expected.

    Inspect Upon Arrival: Upon receiving the coils, inspect the shipment for quality and accuracy, addressing any discrepancies with the supplier immediately.


    More information of 347ss, please kindly browse to our article: What Is 347 Stainless Steel: Composition, Applications, And Benefits

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