309S-SS-SHEET
SS Plate (1)
SS Plate (2)
SS Plate (3)
SS Plate (4)
SS Plate (5)
SS Plate (15)
SS Plate (14)
SS Plate (13)
SS Plate (12)
SS Plate (11)
SS Plate (10)
SS Plate (9)
SS Plate (8)
SS Plate (7)
SS Plate (6)

309S Stainless Steel Sheet

Superior Oxidation Resistance for High-Temperature Applications

Product Name: 309S Stainless Steel Sheet
Standard: ASTM A240, ASME SA-240
Grade: 309S (UNS S30908, EN 1.4833)
Thickness: 0.05 – 150mm(Customizable)
Width: 15 – 2000mm (Customizable)
Surface Finish: 2B, BA, NO.4, HL, Polished
Tensile Strength: ≥ 515 MPa
Yield Strength (0.2% Offset): ≥ 205 MPa
Elongation: ≥ 40% (in 50mm)
Hardness (Brinell): ≤ 217 HBW
Density: 8.0 g/cm³
MOQ: 1 Ton

Free Samples Available!
Experience the quality of our products firsthand—request your free sample today. We’re here to help and welcome your inquiries.

Get Price
PDF Download

309S Stainless Steel Sheet – Your Reliable Solution for High-Temperature Environments

TISCO Steel Group (Jiangsu) Co., Limited is your trusted partner for premium stainless steel products. As a leading distributor, we have direct partnerships with China’s top mills, including TISCO (Taiyuan Iron and Steel), Tsingshan, BAOSTEEL, and ANSTEEL. This allows us to provide you with genuinely high-quality 309S sheets that come with complete traceability and Mill Test Certification (MTC), ensuring every order meets strict international standards like ASTM A240.

309S stainless steel sheet is specifically designed to excel in high-temperature settings. Its key advantage lies in its exceptional oxidation resistance up to 980°C (1800°F), significantly outperforming common 304 and 316 grades. This makes it the ideal choice for critical components such as furnace linings, heat exchangers, boiler parts, and radiant tubes. Additionally, it offers good weldability and formability, simplifying fabrication processes. However, it is important to note that 309S is not recommended for use in chloride-rich environments, as it is susceptible to pitting corrosion, and its higher alloy content comes at a premium cost compared to standard grades.

We understand the precision required in high-temperature industries. That’s why we offer customized cutting services, tailored to your exact dimensions, to minimize your waste and production time. Our expert team provides robust logistics support, ensuring your material arrives on schedule, anywhere in the world.

Choose TISCO Steel Group for:

  • Certified Quality: Direct sourcing from top mills with full MTC.

  • Technical Expertise: In-depth knowledge of high-temperature alloys.

  • Customization: Precisely cut-to-size sheets for your projects.

  • Global Logistics: Reliable shipping to your doorstep.

Free Samples Available! Experience the superior quality of our 309S sheets firsthand. Contact us today to discuss your requirements and request a quote.

Common Surface Treatments

Product Detail Sheet

Product Name309S Stainless Steel Sheet
Processing TechniquesAustenitic,Ferritic,Martensitic,Duplex,Cold Rolling,Hot Rolling
Grade201, 202, 301, 304, 304L, 309S, 310S, 316, 316L, 321, 409, 410, 410S, 430, 630, 2205, 2507 etc
Austenitic stainless steel200 Series: 201, 202
300 Series: 304, 304L, 309S, 310S, 316, 316L, 316Ti, 317L, 321, 347
Ferritic stainless steel409L, 430, 436, 439, 441, 444, 446
Martensitic stainless steel410, 410S, 416, 420J1, 420J2, 431,440,17-4PH
Duplex and special stainless steelS31803, S32205, S32750, 630, 904L
StandardASTM, GB,DIN, JIS etc
SurfaceN0.1, N0.4, 2D, 2B, HL, BA, 6K, 8K, etc
Delivery time3 to 15 days, subject to the customer and quantity
PackagingStandard export package
MOQ1 Ton
SampleFree sample application

Common Chemical Properties

UNSASTMENJISC%Mn%P%S%Si%Cr%Ni%Mo%
S201002011.4372SUS201≤0.155.5-7.5≤0.06≤0.03≤1.0016.0-18.03.5-5.5–
S202002021.4373SUS202≤0.157.5-10.0≤0.06≤0.03≤1.0017.0-19.04.0-6.0–
S301003011.4319SUS301≤0.15≤2.00≤0.045≤0.03≤1.0016.0-18.06.0-8.0–
S304003041.4301SUS304≤0.08≤2.00≤0.045≤0.03≤0.7518.0-20.08.0-10.5–
S30403304L1.4306SUS304L≤0.03≤2.00≤0.045≤0.03≤0.7518.0-20.08.0-12.0–
S30908309S1.4833SUS309S≤0.08≤2.00≤0.045≤0.03≤0.7522.0-24.012.0-15.0–
S31008310S1.4845SUS310S≤0.08≤2.00≤0.045≤0.03≤1.5024.0-26.019.0-22.0–
S316003161.4401SUS316≤0.08≤2.00≤0.045≤0.03≤0.7516.0-18.010.0-14.02.0-3.0
S31603316L1.4404SUS316L≤0.03≤2.00≤0.045≤0.03≤0.7516.0-18.010.0-14.02.0-3.0
S31703317L1.4438SUS317L≤0.03≤2.00≤0.045≤0.03≤0.7518.0-20.011.0-15.03.0-4.0
S321003211.4541SUS321≤0.08≤2.00≤0.045≤0.03≤0.7517.0-19.09.0-12.0–
S347003471.455SUS347≤0.08≤2.00≤0.045≤0.03≤0.7517.0-19.09.0-13.0–
S405004051.4002SUS405≤0.08≤1.00≤0.04≤0.03≤1.0011.5-14.5≤0.60–
S409004091.4512SUS409≤0.08≤1.00≤0.045≤0.03≤1.0010.5-11.75≤0.50–
S430004301.4016SUS430≤0.12≤1.00≤0.040≤0.03≤0.7516.0-18.0≤0.60–
S434004341.4113SUS434≤0.12≤1.00≤0.040≤0.03≤1.0016.0-18.0––
S444004441.4521SUS444L≤0.025≤1.00≤0.045≤0.03≤1.0017.5-19.5≤1.00–
S40300403–SUS403≤0.155.5-7.5≤0.04≤0.03≤0.5011.5-13.0≤0.60–
S4100004101.40006SUS410≤0.15≤1.00≤0.035≤0.03≤1.0011.5-13.5≤0.60≤1.00
S420004201.4021SUS420J10.16~0.25≤1.00≤0.04≤0.03≤1.0012.0-14.0≤0.75≤1.00
S440A440A1.4028SUS440A0.60~0.75≤1.00≤0.04≤0.03≤1.0016.0-18.0–≤0.75
S32750SAD25071.441 ≤0.03≤1.2≤0.035≤0.02≤0.8024.0-26.06.0-8.03.0-5.0
S31803SAF22051.4462 ≤0.03≤2.0≤0.03≤0.02≤1.0021.0-23.04.0-6.52.5-3.5
N08904904L1.4539 ≤0.0.3≤2.0≤0.035≤0.03≤1.0018.0-20.023.0-25.03.0-4.0

Stainless Steel Material Properties

GradesTensile Strength（ksi）Yield strength（ksi）2-inch Elongation (%)Section Shrinkage (%)Brinell Hardness
301110406070165
30290405570150
30390355055160
30485355570150
304L80305570140
31685356070150
316L78305565145
32185355565150
41075403570155
41675403065155
420955025–241
430F80452550165
15-516014515–330
17-4 (Condition A)1501101045332

Packaging & Shipping

📦 Advanced Protective Packaging
Every stainless steel product undergoes a meticulous, multi-layer packaging process designed to endure complex logistics challenges. We utilize VCI (Vapor Corrosion Inhibitor) rust-inhibiting film, reinforced steel-edge protectors, and customized wooden crates to prevent moisture damage, deformation, and handling accidents. Each package is clearly marked with product details and barcodes for full traceability and operational safety—guaranteeing your order arrives in perfect condition.

🚢 Trusted Shipping Partnerships
We collaborate with globally recognized container lines including ONE, ZIM, MSC, MAERSK, and COSCO, providing flexible and reliable freight solutions to major ports across North America, Europe, Southeast Asia, and beyond. Whether your needs require FOB, CIF, or EXW terms, we manage booking, documentation, and customs clearance to ensure seamless door-to-door delivery.

⏱️ On-Time Global Delivery
With established relationships with tier-1 carriers and experienced project logistics teams, we deliver on commitment—on schedule, on specification, and within budget. You receive not just premium stainless steel, but a logistics experience built on reliability and global execution capability.

Industry Application

🔗 The Value of Stainless Steel
Stainless steel is globally recognized for its outstanding corrosion resistance, strength, and adaptability—serving as an essential material across sectors such as construction, medical equipment, automotive manufacturing, and food processing. Yet, sourcing the appropriate grade involves navigating intricate specifications, diverse international standards, and unpredictable supply chain dynamics.

⚙️ How TISCO Simplifies Sourcing
At TISCO Steel Group (Jiangsu) Co., Limited, we streamline stainless steel procurement. As your dedicated supply partner, we deliver customized solutions—from precise material recommendations and fully certified quality assurance to tailored processing and dependable global shipping—all designed to match your project’s exact needs.

📞 Connect with Us
Explore our product portfolio online, request a personalized quote, or consult directly with our technical specialists. Let TISCO provide the reliable stainless steel solution your project deserves.

FAQ

1. What is the main difference between 309S and 304 stainless steel?
309S has a significantly higher chromium (Cr) and nickel (Ni) content, giving it much better oxidation and carburization resistance at high temperatures than 304.

2. What is the maximum continuous service temperature for 309S?
It can be used continuously in temperatures up to 980°C (1800°F).

3. Is 309S stainless steel magnetic?
It is typically non-magnetic in the annealed condition, but slight magnetism may be induced after cold working.

4. Do you provide Mill Test Certificates (MTC) with the order?
Yes, we supply a full MTC with every order, traceable to the original mill, verifying chemical composition and mechanical properties.

5. Can you cut the sheets to our specific size?
Absolutely. We offer precision cutting services to provide you with ready-to-use sheets, minimizing your processing time and material waste.

6. What is the MOQ (Minimum Order Quantity)?
Our standard MOQ is 1 ton, but we can accommodate smaller orders for sample testing. Please contact us to discuss.

7. How does 309S compare to 310S in terms of performance?
310S offers slightly better high-temperature strength and oxidation resistance than 309S, but it also comes at a higher cost. 309S is often the cost-effective choice for many applications.

8. What surface finishes are available for 309S sheets?
We typically supply 2B, NO.1, and polished finishes. Other finishes can be sourced upon request.

9. What are the primary industries that use 309S?
It is commonly used in furnace manufacturing, power generation, chemical processing, and food processing equipment exposed to high heat.

10. How do I request a quote?
Simply contact us via email or the inquiry form on our website. Please provide your required grade, size, thickness, quantity, and destination port for a prompt and accurate quotation.

Additional Services

We provide value-added services including rough machining, heat treatment, cutting, machining, rolling, welding, and surface treatment to ensure your finished product is delivered ready for finishing. All forgings are rough machined according to your specifications and include Mill Test Reports (MTR), Mechanical and Physical Property Reports, as well as Ultrasonic, X-Ray, and Non-Destructive Testing (NDT) reports (as ordered or specified).

By choosing TISCO Steel Group (Jiangsu) Co., Limited, you will receive professional solutions tailored to your needs.

FROM OUR BLOG

Recent News

August 17, 2026 No Comments

409 vs 439 Stainless Steel for Automotive Exhaust: Corrosion, Heat, Cost and Buyer Selection Guide

Read More
July 31, 2026 No Comments

Stainless Steel Truck Fenders: 430 BA vs 304 vs 316 Grade, Finish and Buying Guide

Read More