Stainless Steel 321H – Material Guide


Type Stainless steel 321H is a general-purpose austenitic stainless steel that is known for its general corrosion resistance designed to work within the carbide precipitation temperature range 427 to 816°C (800 to 1500°F). It contains high nickel contents and stabilized with titanium. This grade responds well to hardening by cold working. It has good welding features, and post-weld annealing is not normally required to restore its excellent performance in various corrosive conditions.

Type 321H stainless steel offers a wide variety of benefits including:

  • Responds well to hardening by cold working
  • Good welding characteristics
  • Excellent corrosion resistance in a wide variety of corrosive media
  • High creep & stress rupture properties
  • Very ductile and forms easily

Because of Type 321H’s features and properties, it can be used in a number of industries and critical applications including:

  • Chemical processing
  • Petrochemical
  • Pharmaceutical production
  • Waste treatment including thermal oxidizers
  • Food processing
  • Aerospace applications

What are forms of 321H Stainless Steel available at Jaydeep Steels?

  • Sheet
  • Plate
  • Bar
  • Pipe & Tube
  • Pipe Fittings (i.e. elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
  • Pipe Flanges (i.e. slip-on, blinds, weld-necks, lap joints)

Type 321H Stainless Steel has a much higher carbon content than Type 321. It must have the following chemical composition:

  • Fe balance
  • Cr 17-19%
  • Ni 9-12%
  • C 0.04-0.10%
  • Si 18-20%
  • Mn 2% max
  • P 0.045% max
  • S 0.03% max
  • N 0.10% max
  • Ti 0.70% max

Jaydeep Steels supplies 321H Stainless steel products that meet the most popular international standards including ASTM, ASME, AISI, JIS and many others.