Stainless Steel 316H Flanges Supplier in India

Stainless Steel 316H Flanges are high-carbon versions of the 316 family, designed to serve at higher temperatures above 550 °C and where the normal 316 or 316L grades cannot be used anymore. The most notable feature of SS 316H is the increased carbon content of min 0.04%, max 0.10% which dramatically increases the creep strength and tensile strength at very high operating temperatures which makes it the material of choice in power plants, petrochemical furnaces, and superheater piping systems. These stainless steel flanges are manufactured to ASTM A182 / ASME SA182 F316H standards and equivalent grades UNS S31609 / DIN 1.4436 available in WNRF, SORF, BLRF, RTJ, and others, with pressure classes of 150 -2500 # and sizes of 1 /2 -48 in. Amardeep Steel manufactures SS 316H Flanges to ASTM A182 / ASME SA182 F316H with full EN 10204 3.1 mill test certificates, third-party inspection support, and export-ready packaging serving power generation and petrochemical clients across India and internationally.

Specification of Stainless Steel 316H Flanges

Category	Specification Details
Material Specifications	ASTM A182 & ASME SA182
Dimensional Standards	ANSI/ASME B16.5, B16.47 (Series A & B), B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Standard Types	ANSI, ASME, BS, DIN, EN Flanges, etc.
Size Range	1/2″ (15 NB) to 48″ (1200 NB)
Pressure Ratings (Class)	150#, 300#, 600#, 900#, 1500#, 2500#
Pressure Ratings (PN)	PN6, PN10, PN16, PN25, PN40, PN64, etc.
Flange Face Types	Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Forming Process	Forged (ASTM A182 / ASME SA182 F316H)

Chemical Composition of SS 316H Flanges

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	Fe
SS 316H	0.10 max	2.0 max	0.75 max	0.045 max	0.030 max	16.0 – 18.0	2.0 – 3.0	10.0 – 14.0	68.89 min

316H Stainless Steel Mechanical Properties

Density	Melting Point	Tensile Strength	Yield Strength (0.2% Offset)	Elongation
8.0 g/cm³	1400 °C (2550 °F)	75,000 Psi (515 MPa)	30,000 Psi (205 MPa)	35 %

ASME SA182 316H Flanges Equivalent Grades

Grade	USA (UNS)	France (AFNOR)	European (W.N.)	Japan (JIS)	USA (AISI)
SS 316H	S31609	2 CND 17-12	1.4436	SUS 316H	AISI 316H

Different Types of Stainless Steel 316H Flanges

ASTM A182 Stainless Steel 316H Slip On Flanges

SS 316H Slip On Flanges

ASME SA182 Stainless Steel 316H Weld Neck Flanges

SS 316H Weld Neck Flanges

SS 316H Blind Flanges

SS 316H Lap Joint Flanges

SS 316H Threaded Flanges

ASTM A182 Stainless Steel 316H Socket Weld Flanges

SS 316H Socket Weld Flanges

ASME SA182 Stainless Steel 316H Long Weld Neck Flanges

SS 316H Long Weld Neck Flanges

SS 316H Orifice Flanges

SS 316H Reducing Flanges

ASME SA182 Stainless Steel 316H RTJ Flanges

SS 316H RTJ Flanges

SS 316H SORF Flanges

SS 316H Tongue & Groove Flanges

ASME B16.5 Class 150 Flange Dimensions Chart

Nom. Pipe Size	O.D. (O)	Thk (T)	RF Dia (R)	Hub Dia (X)	No./Dia of Holes	Bolt Circle	Hub Len (L2)	Bore (B2)
1/2″	3.50	0.44	1.38	1.19	4 - 0.62	2.38	0.62	0.88
3/4″	3.88	0.50	1.69	1.50	4 - 0.62	2.75	0.62	1.09
1″	4.25	0.56	2.00	1.94	4 - 0.62	3.12	0.69	1.36
1-1/4″	4.62	0.62	2.50	2.31	4 - 0.62	3.50	0.81	1.70
1-1/2″	5.00	0.68	2.88	2.56	4 - 0.62	3.88	0.88	1.95
2″	6.00	0.75	3.62	3.06	4 - 0.75	4.75	1.00	2.44
2-1/2″	7.00	0.88	4.12	3.56	4 - 0.75	5.50	1.12	2.94
3″	7.50	0.94	5.00	4.25	4 - 0.75	6.00	1.19	3.57
3-1/2″	8.50	0.94	5.50	4.81	8 - 0.75	7.00	1.25	4.07
4″	9.00	0.94	6.19	5.31	8 - 0.75	7.50	1.31	4.57
5″	10.00	0.94	7.31	6.44	8 - 0.88	8.50	1.44	5.66
6″	11.00	1.00	8.50	7.56	8 - 0.88	9.50	1.56	6.72
8″	13.50	1.12	10.62	9.69	8 - 0.88	11.75	1.75	8.72
10″	16.00	1.19	12.75	12.00	12 - 1.00	14.25	1.94	10.88
12″	19.00	1.25	15.00	14.38	12 - 1.00	17.00	2.19	12.88
14″	21.00	1.38	16.25	15.75	12 - 1.12	18.75	2.25	14.14
16″	23.50	1.44	18.50	18.00	16 - 1.12	21.25	2.50	16.16
18″	25.00	1.56	21.00	19.88	16 - 1.25	22.75	2.69	18.18
20″	27.50	1.69	23.00	22.00	20 - 1.25	25.00	2.88	20.20
22″	29.50	1.81	25.25	24.25	20 - 1.38	27.25	3.13	22.22
24″	32.00	1.88	27.25	26.12	20 - 1.38	29.50	3.25	24.25

Weight Chart of Stainless Steel 316H Flanges

Size	Dim	Class 125	Class 150	Class 300	Class 600	Class 1500	Class 2500
1/2″	A	3.50 (88.9)	3.50 (88.9)	3.75 (95.2)	3.75 (95.2)	4.75 (121.0)	5.25 (133.4)
	b	0.44 (11.1)	0.44 (11.1)	0.56 (14.3)	0.56 (14.3)	0.88 (22.2)	1.19 (30.2)
	n-d	4 - 0.62	4 - 0.62	4 - 0.62	4 - 0.62	4 - 0.88	4 - 0.88
3/4″	A	3.88 (98.4)	3.88 (98.4)	4.62 (117.5)	4.62 (117.5)	5.12 (130.0)	5.50 (139.7)
	b	0.50 (12.7)	0.50 (12.7)	0.62 (15.9)	0.62 (15.9)	1.00 (25.4)	1.25 (31.8)
	n-d	4 - 0.62	4 - 0.62	4 - 0.75	4 - 0.75	4 - 0.88	4 - 0.88
1″	A	4.25 (108.0)	4.25 (108.0)	4.88 (123.8)	4.88 (123.8)	5.88 (149.2)	6.25 (159.0)
	b	0.56 (14.3)	0.56 (14.3)	0.69 (17.5)	0.69 (17.5)	1.12 (28.6)	1.38 (34.9)
	n-d	4 - 0.62	4 - 0.62	4 - 0.75	4 - 0.75	4 - 1.00	4 - 1.00
1 1/4″	A	4.62 (117.5)	4.62 (117.5)	5.25 (133.4)	5.25 (133.4)	6.25 (159.0)	7.25 (184.2)
	b	0.62 (15.9)	0.62 (15.9)	0.75 (19.0)	0.81 (20.6)	1.12 (28.6)	1.50 (38.1)
	n-d	4 - 0.62	4 - 0.62	4 - 0.75	4 - 0.75	4 - 1.00	4 - 1.12
1 1/2″	A	5.00 (127.0)	5.00 (127.0)	6.12 (155.6)	6.12 (155.6)	7.00 (177.8)	8.00 (203.0)
	b	0.69 (17.5)	0.69 (17.5)	0.81 (20.6)	0.88 (22.2)	1.25 (31.8)	1.75 (44.5)
	n-d	4 - 0.62	4 - 0.62	4 - 0.88	4 - 0.88	4 - 1.12	4 - 1.25
2″	A	6.00 (152.4)	6.00 (152.4)	6.50 (165.1)	6.50 (165.1)	8.50 (215.9)	9.25 (234.9)
	b	0.75 (19.0)	0.75 (19.0)	0.88 (22.2)	1.00 (25.4)	1.50 (38.1)	2.00 (50.8)
	n-d	4 - 0.75	4 - 0.75	8 - 0.75	8 - 0.75	8 - 1.00	8 - 1.12
2 1/2″	A	7.00 (177.8)	7.00 (177.8)	7.50 (190.5)	7.50 (190.5)	9.62 (244.0)	10.50 (266.7)
	b	0.88 (22.2)	0.88 (22.2)	1.00 (25.4)	1.12 (28.6)	1.62 (41.3)	2.25 (57.2)
	n-d	4 - 0.75	4 - 0.75	8 - 0.88	8 - 0.88	8 - 1.12	8 - 1.25

Application and Industrial Uses of Stainless Steel 316H Flanges

Oil & Gas Industry
Petrochemical Industry
Chemical Processing Industry
Power Generation Industry
Water Treatment Industry
Marine & Shipbuilding Industry
HVAC Industry
Construction Industry
Food & Beverage Industry
Pharmaceutical Industry
Pulp & Paper Industry

Testing and Certification of SS 316H Flanges

The Stainless Steel 316H goes through rigorous testing and different tests to ensure that it will perform well in difficult and harsh conditions.

Positive Material Identification (PMI) Testing
Chemical Composition Analysis (Spectro Analysis)
Mechanical Testing (Tensile Strength, Elongation, Reduction of Area)
Microstructure Examination (Micro Test)
Macrostructure Examination (Macro Test)
Hardness Testing
Pitting Corrosion Resistance Test
Intergranular Corrosion (IGC) Testing
Flaring Test
Flattening Test
Hydrostatic Pressure Test
Hydrogen-Induced Cracking (HIC) Test – NACE TM0284
Sulfide Stress Corrosion Cracking (SSC) Test – NACE TM0177
Radiographic Examination (RT)
Dye Penetrant Inspection (DPT)

Frequently Asked Questions

What is 316H stainless steel?

316H stainless steel is a high-carbon version of 316 grade designed for improved strength and creep resistance at elevated temperatures.

What is ASTM A182 F316H flange specification?

ASTM A182 F316H is a standard specification for forged stainless steel flanges used in high-temperature and high-pressure applications.

What is the difference between 316, 316L, and 316H flanges?

The main difference between them is that 316L has low carbon for better weldability, 316 is the standard grade, and 316H has higher carbon for enhanced high-temperature strength.

What are the applications of SS 316H flanges?

They are used in power plants, petrochemical industries, heat exchangers, and high-temperature process piping systems.

What is the temperature range of SS 316H flanges?

SS 316H flanges are typically used in elevated temperature applications above 550°C, where higher creep strength is required.