Our products conform to GB, AISI, ASTM, DIN, EN, JIS standard for stainlesss steel coil, sheet and plate.
254SMO, UNS S31254, W.Nr. 1.4547
Note that the designation “254SMO®” is registered trademarks of theOutokumpu.
254SMO is a super austenitic stainless steel with the specific levels of Cr, Ni, Mo, and N. It is designed with a combination of impact toughness resistance to chloride stress corrosion cracking, and pitting and crevice corrosion with strength that is twice that of the stainless steel 300 series. 254SMO is often referred to as a“6% Moly”grade due to the molybdenum content, the 6% Moly family has the ability to withstand high temperatures and maintain strength under volatile conditions. In some applications, 254SMO has been a more cost effective substitute for high nickel and titanium alloys.
|
Material |
Cr |
Mo |
S |
Ni |
Si |
C |
Mn |
N |
|
254SMO |
19.5-20.0 |
6.00-6.50 |
1.01max |
17.5-18.0 |
0.80max |
0.02max |
1.00max |
0.18-0.20 |
|
Material |
Tensile strength |
Yield strength 0,2 |
Elongation |
Hardness HB30 |
|
254SMO |
650N/mm² |
300N/mm² |
35% |
270HB |
Oil and Gas: Offshore platforms, subsea equipment, pipelines, and process equipment
Chemical Processing: Reactors, heat exchangers, pumps, and valves
Pulp and Paper: Bleach plants, digesters, and evaporators
Desalination Plants: Heat exchangers, evaporators, and brine heaters
Power Generation: Flue gas desulfurization systems, cooling water systems, boilers, and steam condensers
Food Processing: Tanks, piping systems, and heat exchangers
Marine Applications: Seawater piping, heat exchangers, and offshore structures
254SMO offers excellent resistance to pitting and crevice corrosion due to its high chromium, molybdenum, and nitrogen content. The low carbon content, which means there is very little risk of carbide precipitation during heating. It also has high resistance to corrosion cracking and have excellent ductility and impact strength at both ambient and sub-zero temperatures. Also, 254SMO material possesses very good resistance in water containing chlorides, therefore, it is suitable for use in seawater as it can be exposed to it for prolonged periods without suffering from crevice corrosion.
254 SMO is quite tough to machine due to the extremely high work hardening rate and lack of sulfur content. However using sharp tools, overpowered machine tools, positive feeds, good amount of lubrication, and slow speeds tend to provide good machining results.
Welding of 254SMO stainless steel requires filler material without which it results in poor strength properties. Filler metals such as AWS A5.14ERNiCrMo-3, and alloy 625 are recommende.
Ø Bar & Rod
Ø Plate & Sheet
Ø Coil & Strip
Ø Pipe & Tube
Ø Fitting: Flange, Tee, Elbow, Reducer etc.
Ø Forging: Ring, Shaft, Circle, Block etc.
Ronsco is a supplier with more than 27 years of experience in the stainless steel and nickel alloy field, we always adheres to the business phiosophy of "customer-centered", tries its best to meet the requirements of customers and pursues win-win cooperation with customers. Are you looking for metal products one-stop supplier! Contact Us Now! Email: service@ronsteel.com
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