Stainless Steel 347 Flanges

Stainless Steel 347 Flanges

Arrow Piping Solutions is a trusted manufacturer, supplier, and exporter of high-quality Stainless Steel 347 Flanges in India. We offer a wide variety of ASTM A182 SS 347 Pipe Flanges including Plate Flanges, SORF Flanges, Socket Weld Flanges, Threaded Flanges, Spectacle Blind Flanges, and Lap Joint Flanges at competitive prices.

Stainless Steel 347 is a Columbium/Tantalum stabilized austenitic stainless steel that exhibits superior resistance to intergranular corrosion and maintains excellent weldability and mechanical strength at elevated temperatures. SS 347 is a high-carbon version of 347, providing improved creep resistance, making it suitable for applications in the 450°C to 900°C temperature range.

Arrow Piping Solutions fabricates SS 347 Flanges in compliance with various international standards to serve diverse industries like chemical processing, power plants, pharmaceuticals, marine, and energy sectors. We ensure custom and standard sizes are available in different pressure classes, thicknesses, and flange face types.

Specifications of Stainless Steel 347 Flanges

• Specification: ASTM A182 / ASME SA182
• Dimension Standard: ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, JIS
• Size: 1/2" (15 NB) to 48" (1200 NB)
• Class / Pressure: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6 to PN64
• Flange Face Type: Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	JIS	EN
SS 347	1.4550	S34700	SUS 347	X6CrNiNb18-10
SS 347H	1.4961	S34709	SUS 347H	X6CrNiNb18-12

Chemical Composition

Grade	C	Mn	Si	P	S	Cr	Cb	Ni	Fe
SS 347	0.08 max	2.0 max	1.0 max	0.045 max	0.030 max	17.00 - 20.00	10xC – 1.10	9.00 - 13.00	62.74 min
SS 347H	0.04 – 0.10	2.0 max	1.0 max	0.045 max	0.030 max	17.00 - 19.00	8xC – 1.10	9.00 – 13.00	63.72 min

Mechanical Properties

Density	Melting Point	Tensile Strength	Yield Strength (0.2% Offset)	Elongation
8.0 g/cm³	1454 °C (2650 °F)	75000 psi / 515 MPa	30000 psi / 205 MPa	35%

Standard Sizes and Dimensions

Standard	Class	Diameter	Bolt Circle Diameter	No. of Bolts	Bolt Size	Bolt Hole Dia
ANSI 150	150	89	60	4	13	16
ANSI 300	300	95	67	4	13	16
ANSI 600	600	95	67	4	13	16
ANSI 900	900	121	83	4	19	22
PN10	10	95	65	4	M12	14
PN16	16	95	65	4	M12	14

Application Industries