Re: [MW:8096] (NAS144M) equivalent of this material??

Hi i have found some info for you from net.

 

I understand this high alloy stainless steel. This is not typical 316 L, because, please not Moly content 6.0 to 6.5, Hope this will help you, but you have to search for Standard for 254 MSO

 

Thanks

 

Murugesan

 

 

 

 

 

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

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