Alloy Steel Flanges

Alloy Steel Blind Flanges, ANSI B16.5 Alloy Steel Slip On Flange, Alloy Steel Blind Flanges Alloy Steel Weld Neck Flange, Alloy Steel Socket Weld Flanges, Alloy Steel Slip on Flanges Alloy Steel Threaded Flanges Supplier & Exporter in India

Solitaire Overseas specializes in ASTM / ASME A182 Alloy Steel Flanges, including grades F1, F5, F9, F11, F22, and F91. These flanges are designed to work in high performance in various sectors which are very demanding like oil and gas, chemical processing, power generation and military vehicle production. By utilizing premium raw materials, we ensure our products comply with stringent international standards like ASME B16.5, providing the enhanced hardness and mechanical strength required for heavy-duty commercial operations.

Our product range is designed to maintain structural integrity in extreme high-temperature and high-pressure environments. Compared to standard carbon steel, these alloy steel components offer superior tensile and compressive strength along with exceptional resistance to corrosion. Available in both forged and cast forms, our flanges are suitable for everything from food processing to specialized structural applications, ensuring a long service life even in the most rigorous industrial settings.

We have a large range of configurations, such as threaded, socket weld, and forged flanges, of a great variety of shapes, sizes and pressure ratings. Although our high-alloy grades are also designed to be used with corrosive fluids, our low-alloy steel alternatives have better toughness and hardenability and are more affordable. All flanges have customizable protective coating to ensure long durability and are manufactured in different diameters and thicknesses to fulfill the needs of a particular project.

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Alloy Steel Flanges Specifications
Alloy Steel Flange Material Chemical Composition
Mechanical Properties of ANSI B16.5 Alloy Steel Flange
ASTM A182 Flanges Size Chart
Dimensions Table of AS Flange
Alloy Steel Pipe Flanges Faces
Pressure Ratings Of High Alloy Steel Screwed Flange
ASME SA 182 Alloy Steel Pipe Flange Weight
Alloy Steel Pipe Flanges Surface Finish
Types of Alloy Steel Flanges
Applications of Alloy Steel Pipe Flanges
Related Products

Alloy Steel Flanges Specifications

Our alloy steel flanges are manufactured to meet the highest industrial benchmarks, ensuring compliance with global standards for safety and performance.

Category	Specification Details
Standards	ANSI Flanges, ASME Flanges, API, MSSP, BS Flanges, DIN Flanges, EN Flanges, NACE etc.
Dimension	150#, 300#, 600#, 900#, 1500#, 2500#. PN6, PN10, PN16, PN25, PN40, PN64 etc.
Grade	ASTM / ASME A182 F1 / F5 / F9 / F11 / F22 / F91.
Class/ Pressure	150#, 300#, 400 #, 600#, 900#, 1500# & 2500#
Size	½” to 36″
Wall Thickness	SCH.10, 20, 30, 40, 80, 120, 160, STD, XS, XXS.
Type	Slip on Flanges – SORF, Weld neck Flanges – WNRF, Socket weld Flanges – SWRF, Blind Flanges – BLRF Lapped joint Flanges, Screwed Flanges, Long weld neck Flanges, Reducing Flanges, Spectacle Flanges, Ring joint Flanges

Alloy Steel Flange Material Chemical Composition

The precise concentration of elements like chromium and molybdenum determines the specific grade’s resistance to heat and chemical degradation.

Grade	C	Mn	Si	P	S	Cr	Mo
F1	0.15 max	0.3-0.6	0.5	0.03	0.03	4-6	0.44-0.65
F5	0.15 max	0.3-0.6	0.5-1.0	0.03	0.03	4-6	0.44-0.65
F9	0.15 max	0.3-0.6	0.5-1.0	0.03	0.03	8-10	0.9-1.1
F11	0.5-0.15	0.3-0.6	0.5-1.0	0.03	0.03	1.0-1.5	0.44-0.65
F12	0.15 max	0.3-0.6	0.5	0.03	0.03	4-6	0.44-0.65
F22	0.50.15 max	0.3-0.6	0.5	0.03	0.03	4-6	0.44-0.65
F91	0.15 max	0.3-0.6	0.5-1.0	0.03	0.03	8-10	0.9-1.1

Mechanical Properties of ANSI B16.5 Alloy Steel Flange

These mechanical ratings highlight the superior tensile strength and yield capacity that make alloy steel a robust alternative to standard carbon steel.

Grade	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
F1	275	485	20 %
F5	275	485	20 %
F9	380	585	20 %
F11	205	415	20 %
F12	275	485	20 %
F22	205	415	20 %
F91	380	585	20 %

ASTM A182 Flanges Size Chart

We provide a comprehensive range of sizes to ensure a perfect fit for any piping architecture, from small-bore instrumentation to large-scale industrial pipelines.

NPS	Outside Dia	Flange Thickness	Diameter of Hub	Raised Face Dia	Bore		Fillet Radius	Dia of Hub	Socket Depth
	Outside Dia	Flange Thickness	Diameter of Hub	Raised Face Dia	Lap Joint	Slip-on Socket	Fillet Radius	Dia of Hub	Socket Depth
	O	Q	X	R	B	W	r	H	Z
1/2	3-1/2	7/16	1-3/16	1-3/8	.90	.88	1/8	.84	3/8
4	9	15/16	5-5/16	6-3/16	4.60	4.57	7/16	4.50	15/16
5	10	15/16	6-7/16	7.5/16	5.69	5.66	7/16	5.56	15/16
3-1/2	8-1/2	15/16	4-13/16	5-1/2	4.10	4.07	3/8	4.00	7/8
8	13-1/2	1-1/8	9-11/16	10-5/8	8.75	8.72	1/2	8.63	1-1/4
10	16	1-3/16	12	12-3/4	10.92	10.88	1/2	10.75	1-5/16
6	11	1	7-9/16	8-1/2	6.75	6.72	1/2	6.63	1-1/16
14	21	1-3/8	15-3/4	16-1/4	14.18	14.14	1/2	14.00	1-5/8
2	6	3/4	3-1/16	3-5/8	2.46	2.44	5/16	2.38	11/16
2-1/2	7	7/8	3-9/16	4-1/8	2.97	2.94	5/16	2.88	3/4
16	23-1/2	1-7/16	18	18-1/2	16.19	16.16	1/2	16.00	1-3/4
1	4-1/4	9/16	1-15/16	2	1.38	1.36	1/8	1.32	1/2
3	7-1/2	15/16	4-1/4	5	3.60	3.57	3/8	3.50	13/16
1-1/2	5	11/16	2-9/16	2-7/8	1.97	1.95	1/4	1.90	5/8
12	19	1-1/4	14-3/8	15	12.92	12.88	1/2	12.75	1-9/16
3/4	3-7/8	1/2	1-1/2	1-11/16	1.11	1.09	1/8	1.05	7/16
20	27-1/2	1-11/16	22	23	20.25	20.20	1/2	20.00	2-1/8
1-1/4	4-5/8	5/8	2-5/16	2-1/2	1.72	1.70	3/16	1.66	9/16
24	32	1-7/8	26-1/8	27-1/4	24.25	24.25	1/2	24.00	2-1/2
18	25	1-9/16	19-7/8	21	18.20	18.18	1/2	18.00	1-15/16

Dimensions Table of AS Flange

Detailed dimensional accuracy is maintained across all classes to guarantee seamless alignment and leak-proof connections during installation.

Standard	Class	Bolt Circle Dia	Dia	Bolt Size	Dia of Bolt Hole	No of Bolts
AS 2129 Flange	Table D	67	95	13	14	4
	Table C	67	95	13	14	4
	Table F	67	95	13	14	4
	Table J	83	114	16	17	4
	Table H	83	114	16	17	4
	Table E	67	95	13	14	4
AS4087	PN14	67	95	M12	14	4
ISO 7005 (DIN) Flange	PN16	65	95	M12	14	4
	PN10	65	95	M12	14	4
	PN25	65	95	M12	14	4
	PN20	60.5	90	M14	16	4
	PN6	55	80	M10	11	4
	PN40	65	95	M12	14	4
ANSI B16.5	ANSI 150	60	89	13	16	4
	ANSI 900	83	121	19	22	4
	ANSI 600	67	95	13	16	4
	ANSI 1500	83	121	19	22	4
	ANSI 300	67	95	13	16	4

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Alloy Steel Pipe Flanges Faces

Depending on your sealing requirements, we offer various flange face designs optimized for different gasket types and pressure levels.

Raised Face
Flat Face
Ring Type Joint
Tounge & Groove
Lap Joint

Pressure Ratings Of High Alloy Steel Screwed Flange

Understanding the temperature-pressure relationship is critical for selecting the appropriate flange grade for high-stress environments.

Temp °F	# 900	# 300	# 600	# 400	# 2500	# 150	# 1500
-20 to 100	2085	695	1390	925	5785	265	3470
400	1920	640	1280	855	5330	200	3200
300	1955	655	1305	870	5435	230	3260
500	1865	620	1245	830	5180	170	3105
1000	495	165	330	220	1370	20	825
950	845	280	560	375	2345	35	1405
700	1705	570	1135	755	4730	110	2840
200	2035	680	1360	905	5660	260	3395
650	1765	590	1175	785	4905	125	2940
800	1525	510	1015	675	4230	80	2540
750	1595	530	1065	710	4430	95	2660
600	1815	605	1210	805	5040	140	3025
900	1350	450	900	600	3745	50	2245
850	1460	485	975	650	4060	65	2435

ASME SA 182 Alloy Steel Pipe Flange Weight

CLASS	Nominal Pipe Size	Threaded Flange	Slip On Flange	Socket Weld Flange	Blind Flange	Lap Joint Flange	Weld Neck Flange
150 lb	½	1	1	2	2	1	2
	2	5	5	5	5	5	6
	2½	8	8	8	7	8	10
	16	98	106	98	180	140	140
	22	185	185	185	355	245	225
	18	130	130	130	220	160	165
	1¼	3	3	3	3	3	3
	1½	3	3	3	4	3	4
	3	9	9	9	9	9	11.5
	4	13	13	13	17	13	16.5
	5	15	15	15	20	15	21
	3½	12	11	11	13	11	12
	6	19	19	19	27	19	26
	12	64	64	64	123	64	88
	¾	2	2	2	2	2	2
	1	2	2	2	2	2	3
	20	165	165	165	285	195	197
	14	90	90	90	140	105	114
	8	30	30	30	47	30	42
	10	43	43	43	70	43	54

Alloy Steel Pipe Flanges Surface Finish

Serrated Finish
Spiral Serrated Finish
Stock Finish
Concentric Serrated Finish
Smoothed Finish

Types of Alloy Steel Flanges

Alloy steel flanges come in various types, each designed for specific applications that require high strength, durability, and resistance to pressure, heat, and corrosion. Below are the most common types used across industries.

Alloy Steel Reducing Flange

Chromoly Aisi 4130 Lap Joint Flange

Low Alloy Steel Spectacle Blind Flanges

4130 Alloy Steel SORF Flanges

Chrome Moly Weldo Flange

Low Alloy Steel Square Flanges

Low Alloy Steel High Hub Blind Flanges

High Alloy Steel BLRF Flanges

4130 Alloy Steel Forged Flanges

As Weld Neck Flanges Series A or B

Chromoly Expander Flange

Scm415 Chromoly RTJ Flanges

Chromoly 4130 Screwed Flanges

Chromium Alloy Steel Threaded Flange

4150 Alloy Steel WNRF Flanges

Low Alloy Steel tongue and groove Flange

Chromoly Alloy Ring Joint Flanges

Alloy Steel Socket Weld Flanges

Chromoly Orifice Flange and Plate

4145 Alloy Steel Nipo Flange

Chromium Alloy Steel SWRF Flanges

Applications of Alloy Steel Pipe Flanges

Alloy steel flanges are the backbone of critical infrastructure, providing reliable connections across the world’s most demanding industrial sectors.

Oil and Gas Industry: Alloy steel flanges are extensively used for pipeline and valve connections in the oil and gas sector, where exceptional strength, corrosion resistance, and long-term durability are essential.
Petrochemical Industry: In the petrochemical industry, alloy steel flanges are employed for connecting pipelines and equipment that operate in highly corrosive and chemically aggressive environments.
Chemical Industry: Alloy steel flanges play a vital role in the chemical industry, providing reliable pipeline and equipment connections that require high mechanical strength, resistance to corrosion, and consistent performance.
Power Generation Industry: In power generation applications, alloy steel flanges are used for steam and gas turbine connections, as well as high-pressure piping systems, where they must withstand extreme temperatures and operating pressures.

Chromoly Alloy Pipe Flanges Testing

Purchase PMI, Hardness, and Mechanical Testing from a Leading Alloy Steel Flanges Manufacturer in India at Competitive Prices

Pitting Resistance Test
Micro and Macro Testing
Flattening Test
Intergranular Corrosion Test
Hardness Testing
Mechanical Testing
PMI Testing
Chemical Composition Analysis

Alloy Steel Flanges Price List In India

Description	Price In INR (Per Piece)
Alloy Steel Socket Weld Flange
3/4" X 150# X SCH XS	100.00
1” X 150# X SCH XS	140.00
1-1/2” X 150# X SCH XS	200.00
2 X 150# X SCH XS	250.00
1 X 300# X SCH XS	260.00
1-1/2 X 300 X SCH XS	300.00
Alloy Steel Blind Flange
3/4 X 150#	100.00
1 X 150#	120.00
1-1/2 X 150#	200.00
2 X 150#	240.00
3 X 150#	350.00
4 X 150#	700.00
6 X 150#	1100.00
8 X 150#	1700.00
10 X 150#	2500.00
12 X 150#	3000.00
Alloy Steel Slip On Flange
2 X 150#	210.00
3 X 150#	350.00
4 X 150#	550.00
6 X 150#	700.00
8 X 150#	1500.00
10 X 150#	2100.00
Alloy Steel Weld Neck Flange
2 X 150# X SCH STD	400.00
3 X 150# X SCH STD	600.00
4 X 150# X SCH STD	700.00
6 X 150# X SCH STD	1400.00
8 X 150# X SCH STD	2300.00
10 X 150# X SCH STD	3700.00
12 X 150# X SCH STD	4300.00

Please note: This is an incomplete price list. For the most up-to-date and comprehensive pricing details for Alloy Steel Flanges, please contact us directly.