GB/T 20878 AISI 321 Stainless Steel Coil – Product Overview

The GB/T 20878 AISI 321 Stainless Steel Coil is a high-performance, titanium-stabilized austenitic stainless steel alloy that offers exceptional resistance to intergranular corrosion and excellent high-temperature strength. AISI 321 is commonly used in applications that require excellent corrosion resistance and high strength at elevated temperatures. The addition of titanium prevents carbide precipitation, making it ideal for use in welding applications where the risk of sensitization (grain boundary corrosion) is a concern.

Yuanchi Metal offers premium GB/T 20878 AISI 321 Stainless Steel Coils with excellent mechanical properties, available in different thicknesses, widths, and surface finishes to meet the specific needs of our clients across various industries.GB/T 20878 AISI 321 stainless steel coilGB/T 20878 AISI 321 stainless steel coilGB/T 20878 AISI 321 stainless steel coilGB/T 20878 AISI 321 stainless steel coilGB/T 20878 AISI

Unique Features of GB/T 20878 AISI 321 Stainless Steel Coil

• High-Temperature Resistance: AISI 321 stainless steel offers excellent resistance to oxidation and corrosion at high temperatures, making it suitable for use in environments exposed to continuous high heat.
• Titanium Stabilization: The addition of titanium (around 0.5% to 0.7%) ensures stability in high-temperature applications by preventing chromium carbide precipitation, which can cause corrosion.
• Outstanding Weldability: AISI 321 stainless steel is highly weldable, with no risk of sensitization, making it ideal for applications that involve welding, such as heat exchangers and pressure vessels.
• Corrosion Resistance: AISI 321 provides outstanding resistance to corrosion in a wide range of environments, including acidic and chloride-containing media, while offering better resistance than the commonly used AISI 304.
• Excellent Durability: This stainless steel grade is tough, durable, and resistant to stress-corrosion cracking and is suitable for harsh conditions, such as chemical processing and marine environments.

Technical Specifications of GB/T 20878 AISI 321 Stainless Steel Coil

Applications of GB/T 20878 AISI 321 Stainless Steel Coil

1. Heat Exchangers and Boilers: AISI 321’s excellent high-temperature resistance makes it perfect for use in heat exchangers, boilers, and furnaces, where temperatures can exceed 500°C (932°F).
2. Exhaust Systems: This alloy’s resistance to corrosion and oxidation at high temperatures makes it ideal for use in exhaust systems in industries such as automotive, power generation, and petrochemical.
3. Aerospace Components: AISI 321 is widely used in the aerospace industry for manufacturing components such as aircraft exhaust systems, turbine blades, and engine parts due to its resistance to heat and stress-corrosion cracking.
4. Chemical Processing: Due to its superior resistance to corrosion in aggressive chemical environments, AISI 321 is commonly used in chemical reactors, pressure vessels, and pipelines.
5. Pressure Vessels: The alloy’s ability to withstand high pressures and temperatures makes it a popular choice for the construction of pressure vessels in chemical, petrochemical, and pharmaceutical industries.

Packaging and Shipping

At Yuanchi Metal, we take great care in packaging and shipping our GB/T 20878 AISI 321 Stainless Steel Coils to ensure that they arrive in perfect condition. Each coil is carefully wrapped in protective plastic film or paper to prevent corrosion and damage during transport. For larger orders, the coils are securely packaged on wooden pallets or steel crates to prevent shifting during shipment. We offer flexible shipping options, including both air and sea freight, ensuring timely and reliable delivery to domestic and international locations. Our dedicated logistics team ensures that your order reaches you safely and on schedule.

Frequently Asked Questions (FAQ)

1. What is the primary benefit of using AISI 321 stainless steel over AISI 304?
   • AISI 321 offers superior resistance to intergranular corrosion, especially in high-temperature environments, and has better weldability due to the addition of titanium. It is the ideal choice for applications that require enhanced heat resistance.
2. Can AISI 321 stainless steel withstand high temperatures?
   • Yes, AISI 321 is well-suited for high-temperature applications. It can withstand temperatures up to 900°C (1652°F) in continuous service and up to 925°C (1697°F) for intermittent service.
3. Is AISI 321 stainless steel magnetic?
   • AISI 321 is non-magnetic in the annealed condition. However, it may become slightly magnetic when cold-worked or after significant deformation.
4. Can AISI 321 stainless steel be welded?
   • Yes, AISI 321 is highly weldable. The titanium content prevents carbide precipitation during welding, ensuring strong, durable welds without the risk of sensitization.
5. What is the tensile strength of AISI 321 stainless steel?
   • The tensile strength of AISI 321 stainless steel is typically between 520 MPa and 720 MPa, making it suitable for high-strength applications in harsh environments.
6. What are the common surface finishes for AISI 321 stainless steel?
   • AISI 321 stainless steel coils are available in several surface finishes, including 2B (matte finish), BA (bright annealed), No.4 (brushed finish), and No.8 (mirror finish), depending on the specific requirements of the application.