If you need some help deciding if this is the right material for you, consult our new Product Guides. There is a wealth of both technical and non-technical material that will help you in deciding which materials to buy. Click here for the Stainless guide.

More information about these items can be found below the list of products.


    Need a little help converting decimals to fractions? So do we. Click here or on the button on the left to convert this list to fractions or use our fraction conversion chart

See this category displayed in inches

Please note that any measurements in metric units are not guaranteed to be exact. The dimensions are provided in metric units for your convenience only. Click here for more information on our metric size policy.
Click on any item below to view and continue shopping:

Types 321 (S32100) and 347 (S34700) are stabilized stainless steels which offer as their main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). Type 321 is stabilized against chromium carbide formation by the addition of titanium. Type 347 is stabilized by the addition of columbium and tantalum.

While Types 321 and 347 continue to be employed for prolonged service in the 800 to 1500°F (427 to 816°C) temperature range, Type 304L has supplanted these stabilized grades for applications involving only welding or short time heating.

Types 321 and 347 stainless steels are also advantageous for high temperature service because of their good mechanical properties. Types 321 and 347 stainless steels offer higher creep and stress rupture properties than Type 304 and, particularly, Type 304L which might also be considered for exposures where sensitization and intergranular corrosion are concerns. This results in higher elevated temperature allowable stresses for these stabilized alloys for ASME Boiler and Pressure Vessel Code applications.

The Types 321 and 347 alloys have maximum use temperatures of 1500°F (816°C) for code applications like Type 304, whereas T304L is limited to 800°F (426°C). Applications for Types 321 and 347 include those for welded construction and parts subjected to heating in the carbide precipitation range, aircraft collector rings, aircraft exhaust stacks, boiler casings, cabin heaters, carburetor air intensifier tubes, exhaust manifolds, fasteners, fire walls, flash boilers, flexible couplings, furnace heating elements, jet engine parts, large mufflers for stationary diesel engines, pressure vessels, stack liners, all-welded tank car for carrying chemicals, annealing box inner covers, collector rings, expansion joints, heat resistors, heavy wall welded equipment, welded tanks for storing organic chemicals, wire cloth and screens (industrial).

Types 321 and 347 alloys offer similar resistance to general, overall corrosion as the unstabilized chromium nickel Type 304. Heating for long periods of time in the chromium carbide precipitation range may affect the general resistance of Types 321 and 347 in severe corrosive media.

Your Cart

Total: $0.00

View Cart