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SS 309 Flange - Heat Resistant Austenitic Stainless Steel Flange | Sakshi Forge

Quick Summary (AI Overview)

SS 309 Flange (UNS S30900 / ASTM A182 F309): Heat-resistant stainless steel flange offering oxidation resistance up to 980°C. Sizes 1/2" to 24" NB, Class 150-600 LBS.

SS 309 (UNS S30900) is a heat-resistant austenitic stainless steel with higher chromium and nickel content than 304, providing excellent oxidation resistance for elevated temperature flange applications.

Key Features

High chromium-nickel content for heat resistance
Excellent oxidation resistance up to ~980°C
Good strength retention at high temperature
Standard austenitic weldability
Custom sizes, classes and face finishes

Technical Specifications

ProductSS 309 Flange
StandardASME B16.5 / ASME B16.47
UNS NoS30900
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 F309
Available GradesUNS S30900 / Grade F309

Target Application Industries

Power GenerationFurnace & Kiln EquipmentPetrochemicalHeat Treatment

Applications & Service Areas

High Temperature Furnace PipingHeat Treatment Equipment
SS 309 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 309 Flange.

Available in UNS S30900 (ASTM A182 F309), size 1/2"-24" NB, pressure class 150-600 LBS, in Weld Neck, Slip-On, Blind and Socket Weld types.

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