Stainless Steel 347H Flanges Supplier India | ASTM A182 F347H, UNS S34709

Stainless Steel 347H flanges are mainly based on niobium-stabilized steel, which is made in accordance with the ASTM A 182 F347H international standards. When it's come tro comparison between 347 and 347H, then 347H stainless steel flanges have more carbon percentage compare to 347 ranging from 0.04% to 0.10%, which provides better strength and stress resistance in high temperature environment upto 538°C. This feature makes it suitable for different applications, where the main structure is exposed in a harsh chemical environment for a long period of time, such as petroleum, oil processing, aerospace, or power plant services. Grade 347H also provides a resistance to polythionic acid stress and corrosion cracking which is very important to refinery environments. Amardeep Steel is the major manufacturer and supplier of SS 347H and other grades in different sizes from ½" to 48" across pressure classes 150# to 2500#, and all that are compliant with ASTM A182 F347H and EIL approved.

Specification of Stainless Steel 347H Flanges

Category	Specification Details
Material Standard	ASTM A182 / ASME SA182 (Forged Alloy & Stainless Steel)
Dimensional Standards	ANSI/ASME B16.5, B16.47 (Series A & B), B16.48, BS 4504, BS 10, EN-1092, DIN
Major Standards	ANSI, ASME, BS, DIN, EN Flanges
Size Range	1/2″ (15 NB) to 48″ (1200 NB)
ANSI Pressure Class	150#, 300#, 600#, 900#, 1500#, 2500#
European Pressure (PN)	PN6, PN10, PN16, PN25, PN40, PN64, etc.
Flange Face Types	Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
DIN Standards	2527, 2566, 2573, 2576, 2641-42, 2655-56, 2627-29, 2631-38, 2673
JIS Standards	JIS B2220 (5K, 10K, 16K, 20K)
BS Standards	BS 4504 (PN 6 to PN 250), BS 10 (Tables D, E, F, H)

SUS 347H Flanges Chemical Composition

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

Physical Properties of SS 347H Flanges

Density	Melting Point	Tensile Strength	Yield Strength (0.2% Offset)	Elongation
8.0 g/m³	1454 °C (2650 °F)	75,000 Psi (515 MPa)	30,000 Psi (205 MPa)	35%

ASME SA182 347H Flanges Equivalent Grades

Standard	Werkstoff Nr.	UNS	JIS	EN	UNI
SS 347H	1.4961	S34709	SUS 347H	X7CrNiNb18-10	—

Types of SS 347H Flanges

SS 347H Spectacle Blind Flanges

Stainless Steel 347H Ring Type Joint Flange

NOX 347H Orifice Flanges

ASTM A182 F347H Threaded Flange

WNR 1.4961 Socket Weld Flange

AISI 347H Lap Joint Flanges

SUS 347H Plate Flange

SS 347H Blind Flanges

Stainless Steel 347H Slip On Flange

UNS S34709 Weld Neck Flange

Size Chart of Stainless Steel 347H Flanges

NPS (Inch)	Flange Diameter (Inch)	Number of Bolts
1/4″	3-3/8	4
1/2″	3-1/2	4
3/4″	3-7/8	4
1″	4-1/4	4
1-1/4″	4-5/8	4
1-1/2″	5	4
2″	6	4
2-1/2″	7	4
3″	7-1/2	4
3-1/2″	8-1/2	8
4″	9	8
5″	10	8
6″	11	8
8″	13-1/2	8
10″	16	12
12″	19	12
14″	21	12
16″	23-1/2	16
18″	25	16
20″	27-1/2	20
24″	32	20
26″	41	16

AISI 347H Flanges Pressure Rating Chart

Temp (°F)	150#	300#	400#	600#	900#	1500#	2500#
-20 to 100	275	720	960	1440	2160	3600	6000
200	230	600	800	1200	1800	3000	5000
300	205	540	720	1080	1620	2700	4500
400	190	495	660	995	1490	2485	4140
500	170	465	620	930	1395	2330	3880
600	140	435	580	875	1310	2185	3640
650	125	430	575	860	1290	2150	3580
700	110	425	565	850	1275	2125	3540
750	95	415	555	830	1245	2075	3460
800	80	405	540	805	1210	2015	3360
850	65	395	530	790	1190	1980	3300
900	50	390	520	780	1165	1945	3240
950	35	380	510	765	1145	1910	3180
1000	20	320	430	640	965	1605	2675
1050	20	310	410	615	925	1545	2570
1100	20	255	345	515	770	1285	2145
1150	20	200	265	400	595	995	1655
1200	20	155	205	310	465	770	1285
1250	20	115	150	225	340	565	945
1300	20	85	115	170	255	430	715
1350	20	60	80	125	185	310	515
1400	20	50	65	95	145	240	400
1450	15	35	45	70	105	170	285
1500	10	25	35	55	80	135	230

INOX 347H Flanges HSN Code

Properties	Values
HSN Code	73072100

Application and Industrial Uses of SUS 347H Plate Flange

Power Generation
Heat Exchangers
Pulp & Paper Industry
Petrochemicals
Condensers
Pharmaceuticals
Gas Processing

Price List of SS 347H Flanges

Size (Inch)	Price (INR) Per Piece	Price (USD)
3/4″	₹347	$4.16
1″	₹642	$7.70
1-1/2″	₹823	$9.88
2″	₹1,032	$12.38
3″	₹1,233	$14.80
4″	₹1,591	$19.09
5″	₹1,581	$18.97
6″	₹1,689	$20.27
8″	₹1,531	$18.37

Frequently Asked Questions

What is Stainless Steel 347H flange?

A Stainless Steel 347H flange is a high-carbon, niobium (columbium) stabilized stainless steel pipe fitting designed for high-temperature applications requiring superior creep strength.

What is ASTM A182 F347H flange specification?

ASTM A182 F347H is a standard for forged stainless steel flanges used in high-temperature and high-pressure applications, offering enhanced strength and durability.

What is UNS S34709 material?

UNS S34709 is the material designation for Stainless Steel 347H, known for higher carbon content and improved high-temperature creep resistance.

What is DIN 1.4961 equivalent of SS 347H?

DIN 1.4961 is the European equivalent grade of Stainless Steel 347H, providing similar high-temperature strength and corrosion resistance.

What are the properties of SS 347H flanges?

SS 347H flanges offer high creep strength, excellent resistance to intergranular corrosion, good weldability, and stability at elevated temperatures due to niobium (columbium) addition.