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SMO 254 Stainless Steel- UNS S31254 – 1.4547

SMO 254 Fittings

SMO 254 is austenitic stainless which developed to be used in saltwater and other chloride content environment systems. It has very good resistance against pitting corrosion, crevice corrosion and stress corrosion cracking. Comparing with other conventional austenitic stainless steels like 304 and 316, SMO steels have very good mechanical strength and weldabilities are good.

SMO 254 steels can also be used as cost effective alternative of Nickel-Titanium alloys.

Designation of SMO 254 Stainless Steels

-UNS S31254

-Material Number: 1.4547

-EN: X1CrNiMoCuN20-18-7

Application Areas of SMO 254

-Systems which contact with seawater (Sea water desalination, marine/shipyards)

-Hydraulic piping systems

-Offshore gas platforms

-Highly corrosive chlorid or other halogen content tank and pipelines

-Desulphurisation scrubber units

-Petrochemical refineries

-Desalination units

-Pulp and paper production

-Heat exchangers

Chemical Composition:

C (%)

Si (%)

Mn (%)

Cr (%)

Ni (%)

Mo (%)

N (%)

Cu (%)









SMO 254 Mechanical Properties:

Yield Strength (MPa)

Tensile Strength (MPa)


Hardness (Brinell)





SMO 254 Stainless steels have better corrosion resistance against sulphuric acid or chlorid content environments comparing with 304, 316 and 904 grade steels.

304 and 316 conventional stainless steels can be sensitive against stress corrosion cracking at 80-100⁰C. SMO 254 steels show very good performance against this type of corrosion at high temperature levels.

Comparing with 904L steel, SMO 254 has also better crevice corrosion resistance.

Additionally, SMO 254 show better performance against intergranular corrosion than other stainless steel types.

SMO 254 steel has good toughness and can be used at cryogenic applications.

You can get an offer for SMO 254 stainless steel in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249)

-Fitting and Flange (ASTM A182)

-Round bar (ASTM A276, ASTM A479)

-Plate (ASTM A240, EN 10028-7)

Please contact with us for your SMO 254 product enquiries according to above standards:


DETRA Mühendislik San. ve Tic. Ltd. Sti.
A: Icerenkoy Mah. Umut Sk. No:10-12 Quick Tower K:16 34752 Atasehir/Istanbul-Turkey
T: +90 216 687 03 19
F: +90 216 628 63 68

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