Alloy 254SMO Technical Information
Robert-James Sales, Inc.
Robert-James Sales, Inc.
Technical Information
  Piping Definitions Tube Stainless Steel Alloys Specifications Conversion Calculators 

 
Alloys

Alloy 20
2205
Alloy C-276
317L
310S
321/321H
347/347H
254SMO
AL-6XN
6061 T6
904L
410
304/304L
316/316L
Alloy 200
Alloy 400
Alloy 600
Alloy 625
Alloy 800/800H/800HP
Alloy 825

254SMO

Chemical Composition %

C Cr Cu Mn Mo N Ni P Si S
Max     Max       Max Max Max
0.02 19.5-20.5 0.5-1.0 1.0 6.0-6.5 0.18-0.22 17.5-18.5 0.03 0.80 1.01

AVAILABILITY
Weld Pipe 3/4"- 12"
Butt-Weld Fittings 3/4" - 12"
Flanges 3/4" - 12"
Bar 1" - 8"
SPECIFICATIONS
ASTM A312, A403, A182
ASME SA312, SA403, SA182

DESCRIPTION
254SMO is an austenitic stainless steel designed for maximum resistance to pitting and crevice corrosion. With high levels of chromium, molybdenum, and nitrogen, 254SMO is especially suited for high chloride environments such as brackish water seawater pulp mill bleach plants and other high chloride process streams. 254SMO offers chloride resistance superior to that of Alloy 904L Alloy 20, Alloy 825 and Alloy G. 254SMO is compatible with the common austenitic stainless steels. It is often used as a replacement in critical components of larger constructions where Type 316L or 317L has failed by pitting, crevice attack, or chloride stress corrosion cracking. In new construction, 254SMO has been found in many cases to be a technically adequate and much less costly substitute for nickelbased alloys and titanium. 254SMO is substantially stronger than the common austenitic grades, but is also characterized by high ductility and impact strength. 254SMO is readily fabricated and welded.
(R) 254SMO is A REGISTERED TRADEMARK OF AVESTA SHEFFIELD

DESIGN FEATURES
High resistance to pitting, crevice and general corrosion.
Very high resistance to chloride stress corrosion cracking.
50% stronger than 300-series austenitic stainless steels.
Excellent impact toughness.
Excellent workability and weldability.

TYPICAL APPLICATIONS
Seawater handling equipment
Pulp mill bleach systems
Tall oil distillation columns and equipment
Chemical processing equipment
Food processing equipment
Desalination equipment
Flue gas desulfurization scrubbers
Oil and gas production equipment

TENSILE REQUIREMENTS
Tensile Strength (KSI) 94
Yield Strength (KSI) 44
KSI can be converted to MPA (Megapascals) by multiplying by 6.895.

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Robert-James Sales, Inc.
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