304L Stainless Steel Coil: Core Definition
304L stainless steel coil is an ultra-low carbon austenitic stainless steel coil, an improved version of 304 stainless steel. Its carbon content is strictly controlled to ≤0.03%, chromium content not less than 18%, and nickel content not less than 8%. Through precise component ratios, it balances excellent corrosion resistance, processability, and weldability. It can be used directly without complex post-weld heat treatment, making it suitable for mass production and diverse processing needs. It is one of the most widely used stainless steel coils in industrial production and consumer applications.
Core Characteristics
Superior Corrosion Resistance: The low-carbon design effectively inhibits carbide precipitation during welding or at high temperatures, avoiding chromium depletion at grain boundaries and significantly improving resistance to intergranular corrosion. Chromium and nickel elements form a dense oxide film, which can withstand complex environments such as seawater, weak acids and alkalis, and humid heat. It performs outstandingly in chemical and marine engineering fields, reducing corrosion rate by more than 50% and extending service life by more than 30% compared to ordinary stainless steel.
Excellent processing performance: Supports various processing methods including cold rolling, hot rolling, stamping, bending, and shearing. Excellent cold-working formability allows for processing into various forms such as sheets, pipes, and fittings without cracking or deformation, suitable for automated mass production and reducing processing costs. It can also be processed using various welding processes such as argon arc welding and manual arc welding, requiring no post-weld heat treatment, and the corrosion resistance of the weld area is consistent with the base material.
Wide temperature range stability: Maintains stable mechanical properties within a wide temperature range of -196℃ to 800℃. Non-magnetic, suitable for both cryogenic equipment (such as LNG storage tanks) and high-temperature components (such as automotive exhaust pipes), adapting to different regional and operational requirements.
Non-toxic and environmentally friendly: Meets FDA food-grade standards and international certifications such as ISO, SGS, and BV. Free of harmful impurities, easy to clean and sterilize, suitable for direct use in food processing, medical equipment, and other fields with extremely high hygiene requirements, safe and odorless.
High Cost-Effectiveness: Compared to high-end stainless steel coils like 316L, 304L stainless steel coils offer a more cost-effective alternative while meeting corrosion resistance requirements in most applications. Compared to ordinary 304 stainless steel coils, it exhibits stronger resistance to intergranular corrosion, eliminating the need for additional post-weld treatment costs, resulting in a higher overall cost-performance ratio.
Product Parameters
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Product Name |
304L Stainless Steel Coil |
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Material Standard |
ASTM A240/A480, AISI 304L, JIS SUS304L, GB 06Cr19Ni10, DIN 1.4306 |
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Chemical Composition (Mass Fraction) |
C≤0.03%, Si≤1.0%, Mn≤2.0%, Cr: 18.0~20.0%, Ni: 8.0~12.0%, S≤0.03%, P≤0.035% |
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Mechanical Properties |
Tensile Strength ≥520MPa, Yield Strength ≥205MPa, Elongation ≥40%, Hardness ≤187HB; ≤90HRB; ≤200HV |
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Physical Properties |
Density 8.03g/cm³, Elastic Modulus 193GPa, Thermal Expansion Coefficient 16.9×10⁻⁶/℃, Thermal Conductivity 16.2W/(m·K), Resistivity 72μΩ·cm |
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Specification Range |
Thickness: 2.5mm-10.0mm (Customizable); Width: 610mm-2000mm (Customizable); Length: 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc. (Customizable) |
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Surface Treatment |
BA Finish, 2B Finish, No.1 Industrial Finish, No.4 Brushed Finish, 4K, HL, 8K Mirror Finish, etc. (Customizable on Demand) |
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Production Process |
Hot Rolling, Cold Rolling |
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Edge Treatment |
Edge Grinding, Edge Trimming (Customizable on Demand) |
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Certification |
ISO, SGS, BV and other international certifications; Material certificate and test report are available |
Core Application Areas
Chemical and Petrochemical Industry: Used in reactors, pipelines, pumps, valves, and other equipment. Resistant to strong corrosive media such as sulfuric acid and nitric acid, addressing the shortcomings of ordinary stainless steel such as easy corrosion and short lifespan, and adaptable to the harsh environments of chemical production.
Food and Beverage Industry: Food processing equipment, conveyor belts, packaging containers, kitchenware, etc. Meets food-grade standards, non-toxic, easy to clean, and corrosion-resistant, preventing food contamination and meeting the hygiene requirements of food production.
Medical Equipment Industry: Surgical instruments, pharmaceutical containers, medical stents, etc. Free of harmful impurities, easy to sterilize, and highly corrosion-resistant, ensuring the safety and stability of medical equipment.
Construction and Decoration Industry: Suitable for building curtain walls, handrails, outdoor sculptures, roof decorations, etc., combining aesthetics and weather resistance, adapting to harsh atmospheric environments such as acid rain and smog, requiring minimal maintenance.
Marine Engineering and Shipbuilding Industry: Suitable for offshore platform structural components, seawater desalination equipment, ship parts, etc., resisting seawater erosion corrosion and biofouling, extending maintenance cycles to 10-15 years, reducing operating costs.
Automotive and Aviation Industry: Suitable for automotive exhaust systems, fuel lines, aircraft parts, etc., resistant to high-temperature exhaust corrosion (below 800℃), while achieving a 15%-20% weight reduction, enhancing product competitiveness.
Other Fields: Suitable for high-temperature and electrical industries, agricultural equipment, bolts and nuts, springs, screens, etc., adaptable to diverse scenarios, meeting the personalized procurement needs of different industries.
Why Choose Our 304L Stainless Steel Coils?
Quality Assurance: Raw materials are selected from high-quality scrap steel and alloys, using advanced hot-rolling and cold-rolling processes. Each batch of products undergoes rigorous component testing, mechanical property testing, and surface testing, accompanied by complete test reports and material certificates, preventing unqualified products from leaving the factory.
Customization Services: We can customize 304L stainless steel coils in different thicknesses, widths, lengths, and surface treatments to meet your needs. We also provide cutting, bending, and welding services, offering a one-stop solution to meet your production requirements without the need to find separate processing manufacturers.
Comprehensive Services: 24/7 online customer service, responding to inquiries within 1 minute and sending quotations within 1 hour; free sample delivery service so you can test product quality in advance; professional logistics team cooperation, supporting global delivery, with full tracking of logistics status to ensure safe and timely delivery of goods; after-sales team follow up throughout the process to solve any problems you encounter during use.
