UNS S31254 /254SMO/F44/1.4547
254SMO is a super Austenitic Stainless Steel. 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.
ASTM A182 F44 Duplex 254SMO S31254 Flange is a premium quality stainless steel product that offers high strength, durability, and corrosion resistance to a wide range of applications. This particular flange is made using ASTM A182 F44 254smo material, which is a type of austenitic stainless steel that contains a high level of molybdenum and nitrogen to provide enhanced resistance to pitting and crevice corrosion.
The A182 F44 steel flanges themselves are available in a variety of sizes and styles to meet the needs of different applications. They can be found in different pressure classes, including 150#, 300#, and 600#, with raised face or flat face options. The flanges can also come in different shapes, such as slip-on, blind, socket weld, and threaded etc.
The following sections will discuss in detail about Stainless Steel Grade 254SMO.
Chemical Composition, %
|
Ni
|
Fe
|
Cr
|
Cu
|
Mo
|
N
|
|
17.5~18.5
|
Balance
|
19.5~20.5
|
0.5~1.0
|
6.0~6.5
|
0.18~0.22
|
|
C
|
Mn
|
P
|
S
|
Si
|
|
0.002max
|
1.0max
|
0.030max
|
0.010max
|
0.80max
|
Mechanical Properties
|
Material Grade
|
Yield Strength,
Min(Mpa)
|
Tensile Strength, Min(Mpa)
|
Elongation,Min( %)
|
|
254SMO
|
300
|
650~820
|
28
|
ASTM SPECIFICATION
|
Pipe,
SMLS& Welded
|
Tube ,
SMLS&Welded
|
Sheet/Plate
|
Bar /Rod
|
Forging /Flange
|
BW Fittings
|
|
ASTM A312
|
ASTM A269
|
ASTM A240
|
ASTM A276/A479
|
ASTM A182
|
ASTM A403
|
ASTM A182 F44 Duplex 254SMO S31254 Flange is used in harsh environments, such as chemical processing, oil and gas production, and marine applications.
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