321 Stainless Steel Sheet
What is 321 Stainless Steel Sheet?
321 stainless steel sheet is a versatile material primarily used in a range of demanding applications, from aerospace and thermal to electrical and structural projects. This alloy belongs to the austenitic family of stainless steel, similar to grade 304 but enhanced with titanium as a stabilizer. This key addition enables 321 stainless steel to excel in high-temperature environments, providing exceptional resistance to cracking and corrosion, making it an ideal choice for situations involving welding or sustained elevated temperature operations, up to 900 degrees Celsius — significantly higher than the 500 degrees Celsius limit of its 304 counterpart.
Non-heat treatable and non-magnetic in its annealed state, 321 stainless steel comprises a mix of chromium, nickel, and titanium. Its excellent forming and welding characteristics make it suitable for a wide array of applications, although it is not typically chosen for decorative purposes due to its lack of polishability. The inclusion of titanium not only offers stability under heat but also enhances the alloy’s overall durability and resistance, marking type 321 as a preferred material for advanced engineering needs where heat and corrosion resistance are paramount.
Features of 321 Stainless Steel Sheet
The 321 stainless steel sheet, often referred to as SS321, is a robust material known for its specific attributes that make it ideal for a variety of applications. Unlike some stainless steel grades, 321 steel cannot be hardened through heat treatment; instead, it gains strength through cold working. This alloy is distinguished by its ease of welding—requiring no post-weld annealing—and its remarkable ductility, allowing for easy forming.
SS321 stands out for its excellent corrosion resistance, particularly against dilute organic acids, though it's worth noting its vulnerability to pitting and crevice corrosion in chloride environments. When machining 321 stainless steel, the material's tendency to work harden, partly due to its titanium content, demands particular attention. For optimal machining outcomes, it's advised to use rigid and powerful equipment to minimize vibration, alongside high-quality lubricants, ensuring tools are consistently sharp to prevent undue work hardening and to facilitate smooth cuts.
Overall, 321 stainless plate is a preferred choice in industries where high-temperature resistance and good weldability are crucial, yet it requires careful handling during machining to maintain its integrity and performance.
321 Stainless Steel Chemical Composition & Technical Data Sheet
321 Stainless Steel Standards Comparison
| STS | USA | UNS | CHINA | EURONORM | RUSSIA | SWEDISH | JAPANESE | |
| GRADE | AISI/ASTM | NO | GB | NO | NAME | GOST | SS | JIS |
| 321 | 321 | S32100 | 0Cr18Ni10Ti | 1.4541 | X6CrNiTi18-10 | 12X18H10T | X6CrNiTi18-10 | SUS 321 |
321 Stainless Steel Chemical Composition
| Grade | Standard | Chemical Composition(%) | ||||||||
| C | Si | Mn | P | S | Cr | Ni | Ti | N | ||
| 321 | ASTM A240 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 17.00~19.00 | 9.00~12.00 | 5*(C%+N%)~0.70 | ≤0.10 |
321 Stainless Steel Mechanical Properties
| Grade | Standard | Tensile Test | Hardness Test | |||
| 0.2% Y.S(Mpa) | T.S(Mpa) | Elongation(%) | Hardness | HRB | ||
| 321 | ASTM | ≥205 | ≥515 | ≥40 | Annealed | ≤95 |
321 Stainless Steel Finish & Application
The 321 stainless steel sheet, known as SS321, serves as a versatile and durable option for various high-temperature applications. Its notable uses span across different industries, including the manufacturing of expansion joints, aircraft and furnace parts, and heat exchangers, as well as in mineral processing screens. This grade is recognized for its weldability by all standard methods, with the flexibility of being welded with or without filler metal, catering to a wide range of engineering requirements.
While 321 steel is acclaimed for its robust performance in demanding conditions, it is essential to note that it does not polish well, making it less suitable for decorative applications. Instead, the value of 321 stainless plate lies in its resistance to scaling and vibration fatigue, its high-temperature stability, and its overall durability, rather than in its aesthetic finish. This makes it the material of choice for critical components where functionality and longevity are paramount, underscoring its importance in sectors that require materials capable of withstanding harsh operational environments.
321 Stainless Steel Sheet Package & Loading Details
At Aoxing, as a premier provider of 321 stainless steel sheets, our dedication extends to the excellence of our packaging and shipping practices, developed from years of export experience. We are well-versed in the standards required for export packaging and take additional steps to reinforce our products within the container, ensuring they withstand the rigors of transportation without damage.
Our 321 stainless steel sheets are individually wrapped in robust, water-resistant materials to guard against environmental elements. To ensure the sheets remain immobile and maintain their pristine condition during transit, we employ strategic bracing within the container. This methodical approach to packaging guarantees that your stainless steel sheets arrive in perfect condition, ready for your project needs.
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.
321 Stainless Steel Sheet FAQ
1. Can you provide custom 321 stainless steel sheet?
Absolutely, we tailor 321 stainless steel sheet to your needs, ensuring your specifications for finishes, thickness, width, length and physical properties are met.
2. What's the delivery time?
Quick delivery for trial orders within a week, while regular orders range from 7-30 days.
3. How do you guarantee your 321 stainless steel plate/sheet quality?
Our 321 stainless steel plate/sheet undergo rigorous inspections during manufacturing, cutting, and packaging to ensure the highest quality. And 321 stainless steel sheet mill test certificate is also provided.
4. Can I get some 321 steel samples?
We can provide a 321 steel sample for you to check the quality. Sample is free and you just pay the freight.
5. What is the difference between them, 304 vs 321 stainless steel?
When comparing 321 and 304 stainless steel, several key factors come into play, including corrosion resistance, usability, and specific applications that highlight the strengths and limitations of each alloy.
Corrosion Resistance: Both 321 and 304 stainless steel offer commendable resistance to corrosion. However, 304 stainless steel stands out for its enhanced resistance, attributable to its higher nickel content, making it more adept at handling a broader spectrum of environments, including those that are more corrosive.
Usability and Popularity: 321 stainless steel is well-appreciated for its practical applications, ranking it as a widely used stainless steel variant. Meanwhile, 304 holds the title as the most prevalent type of stainless steel, prized for its exceptional versatility and superior corrosion resistance.
Formability and Weldability: 321 stainless steel is known for its malleability, allowing for easy shaping into various configurations, though it may present some welding challenges. On the other hand, 304 excels in both weldability and formability, facilitating a wider array of fabrication options without compromising material integrity.
Magnetism: The ferritic structure of 321 stainless steel often renders it magnetic, a characteristic that might be considered in specific applications. Conversely, 304 stainless steel is predominantly non-magnetic, making it an ideal choice in scenarios where avoiding magnetic interference is crucial.
Applications in Food Industry: 304 is distinguished as a food-grade stainless steel, making it a preferred choice for the food and beverage industry, where its high corrosion resistance and easy-to-clean surface are essential for maintaining hygiene standards.
In essence, while both 321 and 304 stainless steels provide durable and corrosion-resistant options, the choice between them hinges on the specific requirements of the application. 304’s superior corrosion resistance and non-magnetic qualities often make it a better fit for environments that demand a higher level of durability and are subject to more corrosive conditions.
6. How to choose a 321 stainless steel sheet / 321 stainless steel plate supplier?
Selecting a supplier for 321 stainless steel sheets 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 321 stainless steel sheet 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.
