Why is SS 303 not typically supplied as a Weld Neck flange?

Its added sulfur content improves machinability but reduces weld quality, so it's generally limited to non-welded or lightly welded flange types.

Does Sakshi Forge provide Material Test Certificates (MTC) for the SS 303 Flange?

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

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SS 303 Flange - Free-Machining Austenitic Stainless Steel Flange | Sakshi Forge

Quick Summary (AI Overview)

SS 303 Flange (UNS S30300): Free-machining austenitic stainless steel flange in 1/2" to 12" NB, Class 150-600. Precision machined features with EN 10204 3.1 MTC.

SS 303 (UNS S30300) is a free-machining austenitic stainless steel with added sulfur, offering excellent machinability for flanges requiring precision machined features, at the cost of reduced weldability and corrosion resistance versus 304.

Key Features

Excellent machinability (sulfur-added)

Good general corrosion resistance

Ideal for precision machined flange features

Not recommended for heavy welding

Custom sizes, classes and face finishes

Technical Specifications

Product	SS 303 Flange
Standard	ASME B16.5 / ASME B16.47
UNS No	S30300
Size Range	1/2" - 12" NB
Pressure Class	150 / 300 / 600 LBS
Flange Types	Slip-On, Blind, Socket Weld, Threaded
Face Type	RF / FF
Base Spec	ASTM A182
Available Grades	UNS S30300

Target Application Industries

Precision EngineeringInstrumentationFasteners & Components

Applications & Service Areas

Machined Component FlangesInstrumentation Fittings

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 303 Flange.

Available in UNS S30300, size 1/2"-12" NB, pressure class 150-600 LBS, in Slip-On, Blind, Socket Weld and Threaded types per ASME B16.5.

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.

SS 303 Flange - Free-Machining Austenitic Stainless Steel Flange | Sakshi Forge

Key Features

Technical Specifications

Target Application Industries

Applications & Service Areas

Request Price & Specs

Frequently Asked Questions

Related Products

Flanges

Weld Neck Flanges

Slip On Flanges

Blind Flanges

Partner with Sakshi Forge for Reliable Industrial Steel Solutions