Stainless 254SMO is a lean austenitic heat resistant alloy with high strength and outstanding oxidation resistance. 254SMO maintains its heat resistant properties by advanced control of micro alloy additions. The use of rare earth metals in combination with silicon gives superior oxidation resistance up to 2000. Nitrogen, carbon and a dispersion of rare earth and alkali metal oxides combine to provide creep rupture strength comparable to the nickel base alloys. A wide variety of components requiring high strength at elevated temperatures such as heat exchangers, kilns, stack dampers and oven components are common applications for 254SMO.

Chemical Composition, %

What are the  characteristics of 254SMO?

Excellent oxidation resistance to 2000

High creep-rupture strength

In what type of applications is 254SMO used?

Burners, Boiler Nozzles

Petrochemical and refinery tube hangers

Heat exchangers

Expansion bellow

Stack dampers

Mechanical Properties
Room Temperature

ASTM Specifications