Specifications

Duplex steel is our strength, forms include welded tube, seamless pipe, bar, wire, strip, plate,etc.

 

 

 

Characters:

254 SMO (UNS S31254) is an austenitic stainless steel which due to its high molybdenum content possesses very high resistance to pitting and crevice corrosion. The metal was developed for use in halide-containing environments such as seawater. 254 SMO also shows good resistance to uniform corrosion and is superior to conventional stainless steels especially in acids containing halides.

Chemical composition:

Item Brand

Ni

Cr

Mo

Cu

N

C

Mn

Si

P

S

254SMo

17.5- 18.5

19.5- 20.5

6.0-6.5

0.5- 1.0

0.18- 0.22

≤0.02

≤1.0

≤0.8

≤0.03

≤0.01

Standard

Sheet/Plate

Round bar/Wire

Pipe

Tube

ASTM A240

ASTM A276 ASTM A479

ASTM A269 ASTM A213 ASTM A312

ASTM A249 ASTM A269 ASTM A312 ASTM A358 ASTM A409

254SMO Physical properties :

Density	8.0 g/cm3
Melting point	1320-1390 °C

254SMO minimum mechanical properties in the room temperature:

Status	Tensile strength Rm N Rm N/mm2	Yield strength RP0.2N/mm2	Elongation A5 %
254 SMO	650	300	35

254 SMO is used in the following applications:

1)Equipment for handling of seawater, such as, seawater cooling, cooling water pipes, ballast water systems, firefighting systems etc.

2) Hydraulic and instrumention tubing

3) Equipment in pulp bleaching plants

4) Components in gas cleaning systems

5) Tanks and pipelines for chemicals with high halide contents