AISI 321 Stainless Steel Plate SUS321 1.4541

321 Stainless Steel Plate/Sheet Details

Overview

321 stainless steel plate/sheet is an austenitic stainless steel that contains titanium as a stabilizing element. This grade is known for its excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800–1500°F (427–816°C). 321 stainless steel offers excellent mechanical properties and is suitable for high-temperature environments.

Key Characteristics

Corrosion Resistance: Provides excellent resistance to intergranular corrosion, making it ideal for use in high-temperature applications.

Stabilization with Titanium: Titanium addition helps prevent carbide precipitation, maintaining corrosion resistance and mechanical properties at elevated temperatures.

Mechanical Properties: Exhibits high strength and good toughness even at elevated temperatures.

Formability: Can be readily formed and welded, making it suitable for a wide range of fabrication processes.

Chemical Composition

Carbon (C): ≤ 0.08%

Manganese (Mn): ≤ 2.00%

Silicon (Si): ≤ 0.75%

Phosphorus (P): ≤ 0.045%

Sulfur (S): ≤ 0.03%

Chromium (Cr): 17.0-19.0%

Nickel (Ni): 9.0-12.0%

Titanium (Ti): ≥ 5x(C) and ≤ 0.70%

Common Applications

Aerospace Industry: Used in the manufacture of aircraft exhaust manifolds and other high-temperature components.

Chemical Processing: Employed in chemical processing equipment that requires resistance to high-temperature corrosion.

Thermal Expansion Joints: Suitable for use in thermal expansion joints due to its stability at high temperatures.

Furnace Parts: Ideal for components exposed to high temperatures such as furnace parts and heat exchangers.

Petroleum Refining: Utilized in petroleum refining equipment where high-temperature resistance is crucial.

Advantages

High-Temperature Resistance: Retains strength and resists oxidation at elevated temperatures, making it suitable for high-heat environments.

Excellent Intergranular Corrosion Resistance: Titanium stabilization prevents carbide precipitation, maintaining corrosion resistance after exposure to high temperatures.

Good Mechanical Properties: Offers high strength and toughness, even in challenging conditions.

Versatile Fabrication: Can be easily formed, welded, and machined, allowing for a wide range of manufacturing processes.

Summary

321 stainless steel plate/sheet is a high-performance material designed for high-temperature applications. Its excellent resistance to intergranular corrosion, combined with good mechanical properties and ease of fabrication, makes it an ideal choice for industries such as aerospace, chemical processing, and petroleum refining.

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Common Surfaces

Stainless Steel Standards Comparison Table