254 SMO is a high-performance austenitic stainless steel. Due to its high molybdenum content, it has extremely high resistance to point corrosion and crevice corrosion. It is developed specifically for resisting the corrosion of acids containing halides, such as hydrochloric acid, hydrofluoric acid, phosphoric acid, and sulfuric acid mixed with chlorides. 254 SMO also has good resistance to uniform corrosion. In some cases, it can be comparable to expensive nickel and titanium alloys.
Equivalent brand:
UNS S31254
DIN W. Nr. 1.4547
Products | ASTM |
Bars, bolts and nuts | A 276, A 484 |
Forging | A 473, A 484 |
Chemical composition
% | Fe | Cr | Ni | Mo | C | Mn | Si | P | S | Cu | N |
Min | Bal | 19.5 | 17.5 | 6.0 |
|
|
|
|
| 0.50 | 0.18 |
Max | 20.5 | 18.5 | 6.5 | 0.020 | 1.00 | 0.80 | 0.030 | 0.010 | 1.00 | 0.22 |
Physical property
Density | 7.94 g/cm3 |
Melting point | 1320-1390℃ |
Features:
254 SMO is a high-performance austenitic stainless steel. Due to its high molybdenum content, it has extremely high resistance to point corrosion and crevice corrosion. It is developed specifically for resisting the corrosion of acids containing halides, such as hydrochloric acid, hydrofluoric acid, phosphoric acid, and sulfuric acid mixed with chlorides. 254 SMO also has good resistance to uniform corrosion. In some cases, it can be comparable to expensive nickel and titanium alloys.
Application:
Ocean: marine structures in the marine environment, desalination, aquaculture, and heat exchange of seawater.
Environmental protection field: flue gas desulfurization devices for thermal power generation, wastewater treatment, etc.
Energy sector: Atomic power generation, comprehensive utilization of coal, tidal power generation, etc.
Petrochemical industry: refining, chemical equipment, etc.
Food industry: salt production, soy sauce brewing, etc.
High concentration chloride ion environment: papermaking industry, various bleaching devices.
