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300 Series

300 Series stainless steels are classified as austenitic, and are hardenable only by cold working methods. These grades of stainless have chromium (approx. 18 to 30%) and nickel (approx. 6 to 20%) as their major alloying additions. Type 304  is the most widely used alloy of all stainless steels. 300 Series Stainless steel alloys resist corrosion, maintain their strength at high temperatures and are easy to maintain.

300 series grades  are inventoried in in stainless steel plate, sheet, bar, pipe, tube and structural products.

Product Forms

Penn Stainless stocks the following products in 300 series stainless steel:

Stainless Steel 300 Series Products
Stainless Steel Plate Plate Mill Plate, Diamond Plate More Information
Stainless Steel Sheet 2B/2D Finish, Polished Sheet, Perforated Sheet, Flat & Expanded More Information
Stainless Steel Bar Round Bar, Square Bar, Hex Bar, Rolled Flat. Sheared&Edged, Half Round More Information
Stainless Steel Structural Angles, Unequal Leg, Channel, Beams, Ornamental Square Tube, Ornamental Round Tube, Ornamental Rectangular Tube More Information
Stainless Steel Tubular Seamless Pipe, Welded Pipe, Seamless Tube, Seamless Tube More Information
Common Applications

The 300 series consist of austenitic chromium-nickel alloys. Austentic contains a maximum of 0.15% carbon and a minimum of 16% chromium, and nickel is the important alloying element. This creates superior corrosion resistance and ease of fabrication. Austentic stainless steel has a wide range of mechanical properties and can withstand a wide range of temperatures. Austenitic grades are the most commonly used stainless steels, and are not hardenable by heat treatment.

Stainless steel alloys are used predominantly in:

  • Automotive industry 
  • Aerospace industry
  • Construction industry

 

The table below shows common types of 300 series steel:

300 Series Applications
Type 301 High strength grade, with resistance to atmosphere corrosion. Its bright, attractive surface make it an excellent choice for decorative structural applications.
Type 302 Used for a wide variety of home & commercial applications. One of the most familiar & frequently used alloys in the stainless steel family. Examples include Refrigerators, Dishwashers, and Washing machines
Type 303 A non-magnetic austenitic stainless steel specifically designed to exhibit improved machinability. Medical and pharmaceutical components and parts are common applications.
Type 304 Used for a wide variety of home and commercial applications. One of the most familiar & frequently used alloys in the stainless steel family. Common applications include Sanitary, Cryogenic, and Pressure-containing applications, Home and commercial appliances, Tank structural parts and processing equipment
Type 305 Used for a wide variety of applications. Another frequently used alloy, including applications where good corrosion resistance & excellent drawing ability is needed. Examples include Writing instruments, Utensils, Tank covers and drawn housings
Type 309 Used for elevated temperature applications, including Furnace parts – conveyor belts, rollers, burner parts, refractory supports, retorts and oven linings, fans, tube hangers, baskets and trays to hold small parts; Containers for hot concentrated acids, ammonia and sulfur dioxide; contact with hot acetic and citric acid.
Type 310/S Corrosion resistant, including furnace parts such as conveyor belts, rollers, burner parts, refractory supports, retorts and oven linings, fans, tube hangers, and baskets and trays to hold small parts. Chemical process industry to contain hot concentrated acids, ammonia, and sulfur dioxide and in the food processing industry, they are used in contact with hot acetic and citric acid
Type 316 Used for elevated temperature applications, including handling hot organic and fatty acids, boat rails and hardware and facades of buildings near the ocean
Type 317 More resistant to general corrosion and pitting/crevice corrosion than the conventional chromium-nickel austenitic stainless steels. These alloys offer high tensile strength at elevated temperature
Type 321 A stabilized stainless steel which offers excellent resistance to corrosion following exposure to temperature between 800-1500 Deg F. Applications include Boiler and Pressure Vessels
Type 334 titanium- and aluminum-bearing austenitic stainless steel offering superior elevated temperature scaling resistance compared to the conventional chromium-nickel stainless steels. Heated electric heating elements
Type 347 Stabilized stainless steel which offers excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation rages from 800 to 1500 Deg F. Radiant heaters, Aerospace components and Oil Refining equipment
Type 348 Stabilized stainless steel offering excellent resistance to corrosion after exposure to temperatures between 800-1500 Deg F. Applications including Nuclear powers.
Advantages

The 300 Series Stainless Steel offers several advantages:

  • one of the most common steels, with the ability to be used in a variety of applications.
  • superior corrosion resistant properties
  • developed for applications requiring extensive machining operations
  • non-magnetic properties
  • scratch resistant
  • many Finishing options: polishing, beveling, etc
300 Series High Temp

Penn Stainless Products inventories a wide range of stainless steel heat resistant grades, including 309, 309S, 309H, 310, 310S, 310H, and 330. High temperature stainless grades are stocked in stainless steel plate, sheet, bar and tubular forms.

Do you need a non-standard pipe, tube or structural item manufactured from a high temperature stainless steel grade?  Contact our specialty pipe, tube & structural division—for rapid delivery of non-standard items!

Product Forms

Penn Stainless stocks the following products in 300 Series High Temp stainless steel:

Stainless Steel 300 Series Products
Stainless Steel Plate Plate Mill Plate, Diamond Plate More Information
Stainless Steel Sheet 2B/2D Finish, Polished Sheet, Perforated Sheet, Flat & Expanded More Information
Stainless Steel Bar Round Bar, Square Bar, Hex Bar, Rolled Flat. Sheared&Edged, Half Round More Information
Stainless Steel Structural Angles, Unequal Leg, Channel, Beams, Ornamental Square Tube, Ornamental Round Tube, Ornamental Rectangular Tube More Information
Stainless Steel Tubular Seamless Pipe, Welded Pipe, Seamless Tube, Seamless Tube More Information
Common Applications
High Temp Series Applications
Type 309 Used for elevated temperature applications, including Furnace parts – conveyor belts, rollers, burner parts, refractory supports, retorts and oven linings, fans, tube hangers, baskets and trays to hold small parts; Containers for hot concentrated acids, ammonia and sulfur dioxide; contact with hot acetic and citric acid.
Type 310/S Corrosion resistant, including furnace parts such as conveyor belts, rollers, burner parts, refractory supports, retorts and oven linings, fans, tube hangers, and baskets and trays to hold small parts. Chemical process industry to contain hot concentrated acids, ammonia, and sulfur dioxide and in the food processing industry, they are used in contact with hot acetic and citric acid
Type 330 Combines excellent resistance to carburization and oxidation at temperatures up to 2200 F(1200 C) with high strength.Used in a variety of furnace components as well as in gas turbines, heat exchangers, general heat treating equipment and neutral and cyanide salt pots.
Type 334 titanium and aluminum bearing austenitic stainless steel offering superior elevated temperature scaling resistance compared to the conventional chromium nickel stainless steels. Heated electric heating elements
Advantages

Advantages of High Temp Stainless Steel

  • Oxidation resistance up to 2100°F
  • Resistant to carburization and nitriding
  • Resistant to thermal Shock
  • Good strength at elevated temperature
  • Chloride ion stress corrosion cracking resistance
  • Superior Creep strength (ability to resist distortion over long term exposure to a high temperature).

 

GradeDesciption
301Penn Stainless inventory now includes Alloy 301 (UNS S30100) in sheet and sheet coil with short delivery. This grade is inventoried in three coniditoins: 1/4 hard, 1/2 hard, Full hard.More Information
302Penn Stainless inventory now includes Alloy 302 (UNS S30200) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.More Information
303Penn Stainless inventory includes 303 grade stainless steel (UNS S30300) in plate, round bar, square bar, hex bar, and rolled flat bar.More Information
304Penn Stainless inventory includes 303 grade stainless steel (UNS S30300) in plate, round bar, square bar, hex bar, and rolled flat bar.More Information
304/LPenn Stainless inventory includes Alloy 304L ( S30403), in sheet, sheet coil, plate, plate coil, round bar, processed flat bar and tubular products. Alloy 304L is ideally suited for home and commercial applications.More Information
304/304L ProdecPenn Stainless inventory includes Prodec 304/304L (UNS S30400 / S30403) in stainless steel plate products.More Information
304/HSpecialty testing can be utilized to upgrade sheet and other 304 stainless products with a .04 min carbon.More Information
316/LPenn Stainless inventory includes 316/316L (UNS S31600 / S31603), in sheet, sheet coil, plate, plate coil, bar, structural and tubular products.More Information
316/316L ProdecPenn Stainless inventory includes PRODEC Alloy 316/316L (UNS S31600 / S31603), plate and round bar. PRODEC 316/316L is ideally suited for machining applications.More Information
317/LPenn Stainless inventory now includes stainless steel 317L (UNS S31703) in stainless plate, round bar, processed flat bar and tubular products.More Information
317LMNPenn Stainless inventory now includes Alloy 317LMN (UNS S31726) in plate and processed flat bar.More Information
321/321HPenn Stainless inventory now includes Alloy 321 (UNS S32100) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.More Information
347/347HPenn Stainless inventory now includes Alloy 347/347H (UNS S34700/S34709) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.More Information
309/309SPenn Stainless inventory now includes Alloy 309/309S (UNS S30900/S30908) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.More Information
310/SPenn Stainless inventory now includes 310/ 310S Plate and Processed Flat Bar (Alloy 310 UNS S31000 / Alloy 310S UNS S31008), ideally suited for high-temperature applications such as heat treatment and chemical processing equipment.More Information
310HPenn Stainless inventory now includes 310H Plate and Processed Flat Bar (Alloy 310H UNS S31009), ideally suited for high-temperature applications such as heat treatment and chemical processing equipment.More Information
330Penn Stainless inventory now includes 330 stainless steel Plate and Processed Flat Bar (Alloy 330 UNS N08330), ideally suited for demanding, high-temperature, high-pressure applications such as chemical and petrochemical processing, thermal processing, ore processing, and power generation.More Information