Stainless Steel 321 is a type of austenitic stainless steel that is stabilized with the addition of titanium. This material is known for its excellent resistance to high temperatures. It is commonly used in applications with high temperatures, such as in the aerospace, chemical processing, and power generation industries. Stainless Steel 321 sheet is a flat-rolled sheet product made from this material. It is typically available in a range of thicknesses and sizes and can be supplied in either a cold-rolled or hot-rolled condition. The sheet is often used for applications requiring high strength, corrosion resistance, and heat resistance. 321 Stainless Steel Sheets is a titanium-stabilized austenitic stainless steel that contains 18% chromium, 8% nickel, and 0.08% carbon. This alloy is heat resistant up to 1500°F (816°C) and can be used in oxidizing and reducing environments. It has an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800–1500°F (427–816°C). Stainless Steel 904L Sheets, Stainless Steel 310S Plates and many more grades are also available.

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AISI Steel 321 Plate has great weldability and formability properties and exceptional strength at elevated temperatures. It is commonly used in applications such as pressure vessels, aircraft exhaust systems, chemical process equipment, food processing machinery, and others where both formability and strength are needed. Stainless Steel 321H Plate is another variation of alloy 321 but with higher carbon content for better-elevated temperature strength. Adding carbon also allows this material to be heat treated at lower temperatures than other grades of stainless steel while providing good corrosion resistance at normal temperatures.

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SS 321/321H Sheets & Plates

Stainless Steel 321/321H Sheets & Plates

This makes it ideal for use in applications that require higher strength but do not require frequent changes in temperature or exposure to corrosive environments. Some common services for ASME SA240 SS 321H Sheets include exhaust manifolds on industrial boilers, turbine blades on jet engines, and other components exposed to high-temperature environments with occasional exposure to corrosive elements like salt water spray or fumes from flue gasses. Different types of products are available, such as Duplex Steel UNS S32205 Forged Fittings, Incoloy 825 Flanges, etc.

Stainless Steel 321 Coils have many benefits that make them attractive choices for projects requiring superior performance characteristics. These include excellent formability allowing these alloys to be bent or formed into complex shapes with minimal effort, and good weldability, eliminating the need for expensive welding processes. Exceptional resistance against oxidation, and very good creep resistance, meaning they retain their shape even under extreme pressure. Outstanding toughness means they can handle bumps and impacts without breaking. Excellent corrosion resistance makes them suitable for use even in highly corrosive environments. Low permeability gives them superior protection against leaks when used in pipes or tanks that contain liquids or gasses under pressure.

What are stainless steel 321 sheets?

Stainless Steel 321 Sheet is normally used for aerospace, thermal, electrical, and structural applications. 321 stainless is reinforced with titanium, this alloy excels in high-temperature environments, providing resistance to cracking and corrosion.

What is the difference between stainless steel 321 and 321H sheets?

The difference between 321 and 321H grades lies in the amount of carbon contained within each metal. 321 has at most 0.08% while 321H contains between 0.04% and 0.10% carbon. They both contain at most 2.0% manganese, 0.75% silicon and 0.045% phosphorous.

What are the benefits of using stainless steel 321/321H sheets?

These grades are stabilized by the addition of Titanium. These grades are often utilized for applications in temperatures up to 1,650 ℉. These grades of plate combine high strength, resistance to scaling & phase stability, with resistance to subsequent aqueous corrosion.

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Stainless Steel 321/321H Sheets, Plates & Coils Specification

Standard ASTM A240 / ASME SA240, JIS4304-2005, ASTM A167, EN10088-2-2005, GB/T3280-2007, etc

Range 0.5 mm To 150 mm thick in 1000 mm TO 2000 mm width & 2500 mm to 6000 mm Length available with NACE MR 01-75.

Surface Finishing Hot rolled plate (HR), Cold rolled sheet (CR),2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, Chequered, embossed, hair line, sand blast, Brush, etching, SATIN (Met with Plastic Coated) etc

Form Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc.

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SUS 321/321H Steel Sheet, Plate, Coil Equivalent Indian Standard

SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H X12CrNiTi18-9

ASTM A240 Stainless Steel 321/321H Hot rolled Sheets, Plates & Coils Chemical Composition

Grade C Mn Si P S Cr N Ni Ti
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 0.10 max 9.00 - 12.00 5(C+N) – 0.70 max
SS 321H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 0.10 max 9.00 – 12.00 4(C+N) – 0.70 max

ASME SA240 SS 321/321H Cold Rolled Sheets, Plates & Coils Mechanical Properties

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Other Types of 321/321H Stainless Steel Sheets, Plates and Coils

  • SS 321 Shim Sheets
  • SS 321H Chequered Plates
  • Stainless Steel 321 Coils
  • SS 321H Perforated Sheets
  • Hard Stainless Steel 321/321H Slit Coils

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