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SS 309S Flange - Low Carbon Heat Resistant Stainless Steel Flange | Sakshi Forge

Quick Summary (AI Overview)

SS 309S Flange (UNS S30908 / ASTM A182 F309S): Low-carbon heat-resistant stainless steel flange designed for welded high-temperature service. Sizes 1/2" to 24" NB, Class 150-600.

SS 309S (UNS S30908) is a low-carbon version of 309, reducing the risk of carbide precipitation during welding while retaining excellent high-temperature oxidation resistance for heat resistant flange applications.

Key Features

Low carbon content reduces weld sensitization
Excellent oxidation resistance at high temperature
Good weldability compared to standard 309
Retains strength at elevated temperature
Custom sizes, classes and face finishes

Technical Specifications

ProductSS 309S Flange
StandardASME B16.5 / ASME B16.47
UNS NoS30908
Size Range1/2" - 24" NB
Pressure Class150 / 300 / 600 LBS
Flange TypesWeld Neck, Slip-On, Blind, Socket Weld
Face TypeRF / FF
Base SpecASTM A182 Grade F309S
Available GradesUNS S30908 / Grade F309S

Target Application Industries

Power GenerationFurnace & Kiln EquipmentPetrochemical

Applications & Service Areas

Welded High Temperature PipingFurnace & Exhaust Systems
SS 309S Flange
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 SS 309S Flange.

Available in UNS S30908 (ASTM A182 F309S), size 1/2"-24" NB, pressure class 150-600 LBS, in Weld Neck, Slip-On, Blind and Socket Weld types.

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