321 Stainless Steel Bar, an economical stainless steel ideal for all applications requiring strength and excellent corrosion resistance. 321 Stainless Steel Bar has a durable matte finish and is widely used in all types of fabrication projects that are exposed to elements such as chemical, acidic, freshwater, and saltwater environments. Contact Us For The 321 Stainless Steel Bar Price!
321 Stainless Steel Bars
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321 Stainless Steel Bar Supplier | Manufacturer | Exporter
Introducing Shanghai Huaxiao Metal – Your Trusted 321 Stainless Steel Round Bar Supplier, Manufacturer, and Exporter!
Welcome to Shanghai Huaxiao Metal, your one-stop destination for buying high-quality 321 stainless steel bars. As a reputed supplier, manufacturer, and exporter, we take pride in offering a wide range of high-quality Stainless Steel products to meet the diverse needs of our clients across the globe.
321 Stainless Steel Bar Specification
Available Sizes
- Diameter Range: 1/16″ (1.588 mm) to 12″ (304.8 mm) and above
- Length: Random or custom-cut lengths, typically up to 20 feet (6.1 meters)
- Surface Finish: Bright, Smooth, or Polished
- Shape: Round, Angle, Square, Hexagon, Flat, etc.
Standard Specifications:
The standard specifications for 321 stainless steel bars can vary based on the industry and the specific standards followed. However, here are some commonly referenced standards for 321 stainless steel bars:
ASTM Standards:
- ASTM A276: Standard Specification for Stainless Steel Bars and Shapes. This standard covers various types of stainless steel bars, including hot-finished or cold-finished rounds, squares, hexagons, and other shapes. It specifies the requirements for chemical composition, mechanical properties, heat treatment, and more.
- ASTM A479: Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels. This specification covers hot- or cold-finished bars, except bars for reforging. It includes requirements for chemical composition, mechanical properties, heat treatment, and more.
Other Standards:
- EN Standards: In the European Union, the EN standards provide specifications for stainless steel products. For example, EN 10088-3 covers technical delivery conditions for semi-finished products, bars, rods, and sections for general purposes. EN 10272 specifies dimensions and tolerances for stainless steel bars for pressure purposes.
- ISO Standards: The International Organization for Standardization (ISO) also offers standards for stainless steel products. ISO 683-13 provides heat-treatable steels, alloy steels, and free-cutting steels – bars and heat-treated steels for specialized applications.
- DIN Standards: In Germany, Deutsches Institut für Normung (DIN) standards are widely used. For example, DIN EN 10058 covers hot-rolled flat bars with round edges and special bars for general purposes. DIN EN 10272 specifies stainless steel bars for pressure purposes.
Please note that these are just a few examples of the standards available for stainless steel bars, and the specific requirements may differ between them. It’s important to consult the relevant standard for the precise specifications you require for 321 stainless steel bars. Always refer to the latest version of the standard to ensure accurate and up-to-date information.
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321 Stainless Steel Bar Data Sheet
General Description:
321 Stainless Steel Bar, also known as UNS S32100 and Grade 321, principally 17% to 19% Chromium, 12% Nickel, 0.25% to 1% Silicon, up to 2% Manganese, traces of Phosphorus and Sulfur, 5 x (c + n ) .70% titanium, balance iron. In terms of corrosion resistance, 321 is equivalent to Grade 304 in the annealed condition and is superior if the application involves use in the 797°F to 1652°F range. Grade 321 combines high strength, scale resistance, and phase stability with resistance to subsequent aqueous corrosion.
Chemical Composition:
| Element | C | Cr | Ni | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|
| Percentage | 0.08% max | 17.0 – 19.0% | 9.0 – 12.0% | 2.0% max | 0.75% max | 0.045% max | 0.030% max |
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Mechanical Properties:
| Tensile Strength | Yield Strength (0.2% Offset) | Elongation | Hardness (Rockwell B) |
|---|---|---|---|
| 515 – 720 MPa (74,700 – 104,400 psi) | 205 – 275 MPa (29,700 – 39,900 psi) | 40% minimum | 85 max |
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Physical Properties:
| Physical Property | Value |
|---|---|
| Density | 7.93 g/cm³ (0.286 lb/in³) |
| Melting Point | 1398 – 1420°C (2550 – 2590°F) |
| Specific Heat Capacity | 0.50 J/g°C (0.12 Btu/lb°F) |
| Thermal Conductivity | 16.3 W/m°C (113 Btu-in/h-ft²-°F) |
| Electrical Resistivity | 72 µΩ-cm (28.5 µΩ-in) at 20°C (68°F) |
| Modulus of Elasticity | 193 GPa (28 x 10^6 psi) |
| Poisson’s Ratio | 0.3 |
| Coefficient of Thermal Expansion | 16.5 µm/m°C (9.2 µin/in°F) at 20-100°C (68-212°F) |
| Magnetic Properties | Austenitic stainless steels like 321 are generally non-magnetic in the annealed condition. However, they can become slightly magnetic after cold working or exposure to certain environments. |
Corrosion Resistance:
321 stainless steel offers excellent corrosion resistance in various environments, especially in applications involving exposure to mild to moderate concentrations of oxidizing agents. Its resistance to intergranular corrosion after exposure to elevated temperatures makes it a suitable choice for specific applications. Here are some key points:
- Oxidation Resistance: 321 stainless steel performs well in high-temperature environments due to its chromium and nickel content. It forms a stable oxide layer on the surface that protects against oxidation at elevated temperatures.
- Intergranular Corrosion Resistance: The addition of titanium to the alloy composition helps prevent the formation of chromium carbides at grain boundaries, making 321 stainless steel resistant to intergranular corrosion after exposure to high temperatures. This property makes it particularly useful in applications where welding or exposure to elevated temperatures might occur.
- Sensitization: Sensitization is the formation of chromium carbides at grain boundaries, which can reduce the material’s corrosion resistance. 321 stainless steel’s composition minimizes the risk of sensitization, enhancing its performance in corrosive environments.
- Applications: Due to its corrosion resistance properties, 321 stainless steel is used in industries such as aerospace, chemical processing, automotive, high-temperature processing, oil and gas, food and beverage, and more.
- Limitations: While 321 stainless steel is suitable for a wide range of environments, it might not be the best choice for highly acidic or chloride-rich environments where more corrosion-resistant stainless steel grades, such as 316 or 904L, might be preferred.
It’s important to consider the specific corrosive environment and application requirements when selecting a stainless steel grade. Always refer to the manufacturer’s datasheets or consult with materials experts to ensure the appropriate material choice for your intended use.
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Fabrication and Weldability:
- Machinability: 321 stainless steel has good machinability, but it tends to work hard quickly. Therefore, appropriate cutting speeds, tool geometry, and adequate cooling are important to prevent excessive tool wear and work hardening.
- Formability: 321 stainless steel has good formability and can be easily formed using a variety of techniques, such as bending, deep drawing, and spinning.
- Weldability: 321 stainless steel is readily weldable using common welding methods, such as TIG (GTAW), MIG (GMAW), and SMAW. However, it’s important to consider the following points:
- Preventing Sensitization: While 321 stainless steel is designed to resist sensitization and intergranular corrosion, prolonged exposure to high temperatures during welding can still potentially lead to sensitization. To minimize this risk, interpass temperature control and post-weld heat treatment may be employed.
- Filler Material: Using a filler metal with a titanium content similar to that of the base material is recommended to maintain the stability of the alloy during welding. Standard austenitic stainless steel filler metals, such as AWS E308L, are commonly used.
- Avoiding Heat Concentration: Avoid excessive heat concentration during welding, which can lead to overheating and potential distortion. Proper welding techniques and short welding cycles can help control heat input.
- Post-Weld Heat Treatment: While not always necessary, post-weld heat treatment can be performed to restore the full corrosion resistance and mechanical properties of the welded joints.
- Surface Finishing: 321 stainless steel can be polished, brushed, or otherwise finished to achieve the desired surface appearance.
- Annealing After Cold Working: If the material undergoes cold working, it should be annealed afterward to restore its corrosion resistance properties.
- Corrosion Protection: Depending on the application, it might be advisable to consider appropriate corrosion protection methods such as passivation.
Always follow recommended welding procedures and guidelines provided by the manufacturer or relevant standards when working with 321 stainless steel bars. Consulting with experienced welders and materials experts can also help ensure successful fabrication and welding processes.
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Applications:
- Aerospace: Engine components, exhaust systems.
- Chemical Processing: Equipment exposed to corrosive chemicals.
- Automotive: Exhaust systems, catalytic converters.
- High-Temperature Processing: Furnace parts, heat exchangers.
- Oil and Gas: Offshore platforms, pipelines.
- Food and Beverage: Processing equipment, tanks.
- Medical: Some medical devices and equipment.
- Welded Components: Resistance to intergranular corrosion in welded structures.
Availability:
321 stainless steel bars are available from various suppliers and manufacturers in different forms and sizes to meet the needs of various industries and applications. The availability of 321 stainless steel bars can include:
- Forms: 321 stainless steel bars can be found in various forms, including round bars, square bars, hexagonal bars, and more. The choice of form depends on the intended application and the specific requirements of the project.
- Sizes: Bars are available in a range of sizes, typically specified by their diameter or cross-sectional dimensions. The sizes offered can vary from small diameters suitable for precision applications to larger diameters for heavy-duty industrial use.
- Lengths: Stainless steel bars are commonly available in standard lengths, such as 10 feet or 12 feet. Custom lengths might also be available upon request from suppliers.
- Surface Finish: Depending on the supplier and the intended application, 321 stainless steel bars can come in various surface finishes, including polished, brushed, or mill-finished.
- Customization: Some suppliers offer customization options, such as cutting bars to specific lengths, providing specific surface finishes, or even producing bars with unique shapes for specialized applications.
When sourcing 321 stainless steel bars, consider factors such as the quantity needed, specific dimensions, surface finish requirements, and any additional specifications. It’s advisable to work with reputable suppliers who can provide certified material with reliable quality and adherence to industry standards. Be sure to check the supplier’s product catalog or contact their sales representatives for information about the availability of 321 stainless steel bars in the desired forms and sizes.
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321 Stainless Steel Bar Stock
321 Stainless Steel Bar Stock – Extensive and Comprehensive Inventory, Ready for Immediate Orders with Fast Delivery！
At Shanghai Huaxiao Metal, we take pride in maintaining a vast and diverse stock of 321 stainless steel bars, making us your reliable source for all your stainless steel needs. Our extensive inventory ensures that you can find the perfect solution for your specific requirements, while our commitment to customer satisfaction guarantees a seamless ordering experience.
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Why Choose Us As Your 321 Stainless Steel Bar Supplier?
1. Unparalleled quality: At Shanghai Huaxiao Metal, we adhere to strict quality standards to ensure that each 321 stainless steel bar is crafted with precision and excellence. Our rods offer exceptional durability, corrosion resistance, and strength, making them ideal for a variety of industrial applications.
2. Extensive product range: We can meet your requirements whether you need standard sizes or customized specifications. Our diverse inventory includes a variety of diameters and lengths, giving you the flexibility to meet your unique project requirements.
3. State-of-the-Art Manufacturing: Our focus on cutting-edge technology and modern machinery employs an efficient manufacturing process that guarantees the highest precision and consistency with every 321 stainless steel bar we produce.
4. Global export scope: As a customer-oriented company, we serve customers from all over the world. With our reliable export service, you can trust that your order will reach you safely and on time, no matter where you are in the world.
5. Dedicated customer support: Our team of experts is dedicated to providing exceptional customer support, guiding you through the selection process, and providing personalized solutions to meet your specific needs. Your satisfaction is our top priority.
6. Competitive Pricing: We understand the importance of affordability without compromising quality. Our 321 Stainless Steel Bar is competitively priced to provide excellent value for your investment.
Partner with Shanghai Huaxiao Metal for all your 321 Stainless Steel Bar needs and experience the difference top-tier products and unparalleled service can make for your projects. Contact us today to explore our product range or request a quote. Let’s work together to take your stainless steel solutions to new heights!
