254 SMO UNS S31254 Seamless Stainless Steel Pipe
Design Features
*High resistance to pitting and crevice corrosion
*Very high resistance to chloride stress corrosion cracking
*50% stronger than 300-series austenitic stainless steels
*Excellent impact toughness
*Excellent workability and weldability
Applications
Seawater handling equipment
Pulp mill bleach systems
Tall oil distillation columns and equipment
Chemical processing equipment
Food processing equipment
Desalination equipment
Flue gas desulfurization scrubbers
Oil and Gas production equipment
General Characteristics
254 SMO® is an austenitic stainless steel designed for maximum resistance to pitting and crevice corrosion. With high levels of chromium, molybdenum, and nitrogen, 254 SMO is especially suited for high-chloride environments such as brackish water, seawater, pulp mill bleach plants, and other high-chloride process streams.
254 SMO offers chloride resistance superior to that of Alloy 904L, Alloy 20, Alloy 825, and
Alloy G. 254 SMO is compatible with the common austenitic stainless steels. It is often used as a replacement in critical components of larger constructions where Type 316L or 317L has failed by pitting, crevice attack, or chloride stress corrosion cracking. In new construction, 254 SMO has been found in many cases to be a technically adequate and much less costly substitute for nickel-base alloys and titanium.
254 SMO is substantially stronger than the common austenitic grades, and it is also characterized by high ductility and impact strength.254 SMO is readily fabricated and welded.
254SMO
Chemical Composition %
|
C |
Cr |
Cu |
Mn |
Mo |
N |
Ni |
P |
Si |
S |
|
Max |
|
|
Max |
|
|
|
Max |
Max |
Max |
|
0.02 |
19.5-20.5 |
0.5-1.0 |
1.0 |
6.0-6.5 |
0.18-0.22 |
17.5-18.5 |
0.03 |
0.80 |
1.01 |
