254SMO Characteristics
254 SMO is a high end molybdenum and nitrogen alloyed super austenitic stainless steel with low carbon content. It can withstand a wide range of acids due to the high alloying content of chromium and molybdenum. Resistance to pitting and crevice corrosion is determined mainly by the chromium, molybdenum, and nitrogen content. 254 SMO has high amounts of these elements and is suitable for demanding environments like chlorinated sea water. Resistance to stress corrosion cracking increases with increased content of nickel and molybdenum in particular. This means that 254 SMO has very good resistance to stress corrosion cracking. It is also characterized by high ductility and impact strength,with strength nearly twice that of 300 series stainless steel.
Stainless steel S31254 Chemical Composition, %
|
Grade |
C≤ |
Mn≤ |
P≤ |
S≤ |
Si≤ |
Cr |
Mo |
Ni |
Cu |
N |
|
254SMO |
0.02 |
1 |
0.03 |
0.01 |
0.8 |
19.5-20.5 |
6.0-6.5 |
17.5-18.5 |
0.5-1.0 |
0.18-0.25 |
Stainless steel 254SMO Mechanical Properties
|
Mechanical properties |
Tensile, min, ksi[MPa] |
Yield, min, ksi[MPa] |
Elongation, %(min) |
Hardness, HB(max) |
|
S31254 |
100【690】 |
45【310】 |
35 |
223 |
Physical properties
Density: 8 g/cm3
Stainless steel 254SMO Equivalent Grades
|
STANDARD |
WERKSTOFF NR. |
UNS |
AFNOR |
EN |
|
SMO 254 |
1.4547 |
S31254 |
Z1 CNDU20.18.06AZ |
X1CrNiMoCuN20-18-7 |
ASTM Specifications
|
Pipe, |
Tube, |
Tube, |
Sheet/Plate |
Bar /Rod |
Forging /Flange |
BW Fittings |
|
ASTM A312 |
ASTM A269 |
ASTM A213 |
ASTM A240 |
ASTM A276/A479 |
ASTM A182 |
ASTM A403 |
Stainless steel 254SMO Application
1.Tanks and pipelines for chemicals with high halide contents.
2.Flue gas desulfurization.
3.Equipment in pulp bleaching plants.
4.Components in gas cleaning systems.
5.Hydraulic and instrumentation tubing.
6.Equipment for handling of seawater, such as seawater cooling, cooling water pipes, ballast water systems, firefighting systems etc.
Hot Tags: stainless steel 254smo / f44 / uns s31254 / 1.4547, China stainless steel 254smo / f44 / uns s31254 / 1.4547 manufacturers, suppliers, ,
