Why is 254 SMO called "6Mo"?

The name refers to its approximately 6% molybdenum content, which is central to its exceptional resistance to pitting and crevice corrosion in chloride-rich environments.

Does Sakshi Forge provide Material Test Certificates (MTC) for the 254 SMO Flange?

Yes, MTC as per EN 10204 3.1 is provided with every dispatch along with PMI test reports.

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254 SMO (6Mo) Flange - Super Austenitic High Alloy Flange | Sakshi Forge

Quick Summary (AI Overview)

254 SMO (6Mo) Flange (UNS S31254 / ASTM A182 F44): 6% Mo super-austenitic flange for extreme seawater, desalination and chloride service. Sizes 1/2" to 24" NB, Class 150-900.

254 SMO (UNS S31254), also known as 6Mo, is a super-austenitic stainless steel with high molybdenum, chromium and nitrogen content, providing exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in aggressive chloride environments.

Key Features

High molybdenum (6%) super-austenitic composition

Exceptional pitting and crevice corrosion resistance

High PREN (Pitting Resistance Equivalent Number)

Excellent performance in seawater and chloride service

Custom sizes, classes and face finishes

Technical Specifications

Product	254 SMO (6Mo) Flange
Standard	ASME B16.5 / ASME B16.47
UNS No	S31254
Size Range	1/2" - 24" NB
Pressure Class	150 / 300 / 600 / 900 LBS
Flange Types	Weld Neck, Slip-On, Blind, Socket Weld
Face Type	RF / FF
Base Spec	ASTM A182 Grade F44
Available Grades	UNS S31254 / Grade F44

Target Application Industries

Offshore & MarineDesalinationChemical ProcessingPulp & Paper

Applications & Service Areas

Seawater Piping SystemsDesalination Plant PipingFGD Systems

Quick Quotation

Request Price & Specs

MTC EN 10204 3.1 & Inspection provided

Pan-India & global sea-freight dispatch

Custom dimensions/drawings supported

Response time: Less than 2 hours

Frequently Asked Questions

Read commonly asked questions about specifying and ordering 254 SMO (6Mo) Flange.

Available in UNS S31254 (ASTM A182 F44), size 1/2"-24" NB, pressure class 150-900 LBS, in Weld Neck, Slip-On, Blind and Socket Weld types.

Partner with Sakshi Forge for Reliable Industrial Steel Solutions

Delivering precision-engineered flanges, pipes, and forged steel components designed for strength, durability, and performance in critical high-pressure industrial applications.

254 SMO (6Mo) Flange - Super Austenitic High Alloy Flange | Sakshi Forge

Key Features

Technical Specifications

Target Application Industries

Applications & Service Areas

Request Price & Specs

Frequently Asked Questions

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Partner with Sakshi Forge for Reliable Industrial Steel Solutions