About Alloy
254 SMO is a high end, molybdenum and nitrogen alloyed super austenitic stainless steel with low carbon content. It demonstrates outstanding resistance to pitting, crevice corrosion stress cracking, and corrosion fatigue uniform corrosion. 254 SMO is substantially stronger than the common austenitic grades, with strength nearly twice that of 300 series stainless steel. It is also characterized by high ductility and impact strength. With high levels of chromium, molybdenum, and nitrogen, 254 SMO is frequently used in high chloride environments, such as brackish water, seawater, pulp mill bleach plants, and other chloride process streams. In some applications it has even been found to be a more cost effective substitute for high nickel and titanium alloys.
Product Form & Standard
Plate/Sheet/Strip
Pipe/Tube
Round/Square/Hexangular/Flat bar
Forgings
Chemical Composition
| % | C | Cr | Mn | Mo | N | Ni | P | Si | S |
| 254 SMO | 0.02 max | 19.5- 20.0 | 1.00 max | 6.0- 6.5 | 0.18- 0.20 | 17.5- 18.0 | 0.03 max | 0.80 max | 1.01 max |
Mechanical Properties
| Alloy | Tensile Strength MPa | Yield Strength (0.2% Offset) MPa | Elongation (%) |
| 254SMO | 650-850 | 300 | 35 |
Application
Due to its high levels of molybdenum and nickel, Alloy 254 SMO is frequently used in high chloride environments. Examples of applications that call for the used of Alloy 254 SMO include:
Petroleum production
Saltwater handling
Food and chemical processing equipment
Pulp mill bleach systems
Flue gas desulphurization scrubbers
Tall oil distillation columns
Offshore oil & gas production equipment
Desalination equipment
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