Inconel 718 Flanges Manufacturer

Midland Alloys Inc. is a trusted Indian manufacturer and global supplier of Inconel 718 Flanges, offering reliable solutions for critical applications. These flanges are crafted from a high-strength, corrosion-resistant nickel-chromium alloy known for excellent performance in extreme environments. Inconel 718, also identified as UNS N07718, Werkstoff Nr. 2.4668, and JIS NCF 718, is a precipitation-hardenable alloy containing niobium that delivers outstanding tensile, fatigue, and rupture strength. Available under standards such as ASME SB564, EN 1092, and DIN 2.4668, these flanges are used where high mechanical performance and resistance to oxidation are essential. Often known as Alloy 718 Flanges, these flanges are perfect for the nuclear, marine and aerospace industries, as they can withstand temperatures of up to 700°C without losing their integrity. Each product satisfies the requirements of Inconel 718 Flanges, which include chemical composition (Ni 50–55%, Cr 17–21%, Mo 2.8–3.3%, Nb 4.75–5.5%), tensile strength (≥965 MPa), yield strength (≥758 MPa), elongation (≥12%), and area reduction (≥30%).

Benefits of Inconel 718 Flanges

Inconel N07718 Flanges offer superior value for demanding industrial environments where heat, pressure and corrosion are persistent challenges. They are a suitable option for systems that require high performance due to their superior mechanical and thermal qualities.

Resists extreme temperatures up to 700°C
High resistance to intergranular corrosion, pitting and crevices
Provides exceptional mechanical strength and long-term durability
Maintain structure under high stress, and creep conditions
Prevents cracking when welding, and machining
Provides longer service life and lower maintenance costs
Used in various engineering requirements and configurations

Difference between Inconel 718 Flanges vs. Inconel 625 Flanges

Inconel 718 Flanges and Inconel 625 Flanges are both nickel alloys but are quite different in terms of strength, hardening behavior, and temperature ranges. Alloy 718 is a precipitation-hardenable alloy with niobium and molybdenum and has better tensile and rupture strength, particularly in the range of 600–700°C. On the other hand, Inconel 625 is dependent on solid-solution strengthening and performs well in terms of corrosion resistance in lower to moderate temperatures. While 625 is preferred due to its superior weldability and ductility. 718 provides superior fatigue strength and is more appropriately used in high-stress aerospace and turbine applications.

Inconel 718 Flanges Standard Size & Specification

Types of Inconel 718 Flanges

Manufacturing Types

SORF (Slip-On Raised Face)

Slides over the pipe and gets welded for easy installation in low-pressure systems.
BLRF (Blind Raised Face)

Closes off pipe ends; used for testing or sealing flow in a system.
SWRF (Socket Weld Raised Face)

Pipe fits into a recessed area and is welded around the edge. Ideal for small-bore, high-pressure lines.
WNRF (Weld Neck Raised Face)

Has a long, tapered hub and welds to the pipe for strong, leak-proof joints under high pressure.

Face Forms

Raised Face (RF)

The most common type has a raised surface that improves gasket sealing in medium to high pressure.
Ring Type Joint (RTJ)

Uses a metal ring for sealing and works well in high-pressure, high-temperature services.
Flat Face (FF)

Flat surface flange used with cast iron or low-pressure piping where full face gasket is needed.
Lap-Joint Face (LJF)

Used with stub ends and are easy to align and install. Good for systems that need frequent dismantling.

Contact Midland Alloys Inc. for Your Inconel 718 Flanges Needs

Contact us today to discuss how Inconel 718 Flanges can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.

Technical Details & Delivery Condition

Chemical Composition of Inconel 718 Flanges

Grade	C	Mn	Si	S	Cu	Fe	Ni	Cr
Inconel 718	0.08 max	0.35 max	0.35 max	0.015 max	0.30 max	–	50.00 – 55.00	17.00 – 21.00

Mechanical & Physical Properties of Alloy 718 Flanges

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2% Offset)	Elongation
Inconel 718	8.2 g/cm3	1350 °C (2460 °F)	Psi – 1,35,000 , MPa – 930	Psi – 75,000 , MPa – 482	45 %

Equivalent Grades Of Inconel 718 Flanges

STANDARD	WERKSTOFF NR.	UNS
Inconel 718	2.4668	N07718

Inconel 718 Flanges Dimension

Size

Hub at Base Dia.

Raised Face Dia.

Length Thru Hub

Hub at Bevel Dia.

Bore And Dia.

Socket Depth

Fillet Radius

Loose (Lap Joint)

Weld Neck (WN)

SORF, NPT, SWRF

SORF, SWRF

Loose (Lap Joint)

3/4

3-7/8

1/2

1-1/2

1-11/16

5/8

2-1/16

5/8

1.05

1.11

1.09

7/16

1/8

1/2

3-1/2

7/16

1-3/16

1-3/8

5/8

1-7/8

5/8

.84

.90

.88

3/8

1/8

4-1/4

9/16

1-15/16

11/16

2-3/16

11/16

1.32

1.38

1.36

1/2

1/8

1-1/2

11/16

2-9/16

2-7/8

7/8

2-7/16

7/8

1.90

1.97

1.95

5/8

1/4

1-1/4

4-5/8

5/8

2-5/16

2-1/2

13/16

2-1/4

13/16

1.66

1.72

1.70

9/16

3/16

3/4

3-1/16

3-5/8

2-1/2

2.38

2.46

2.44

11/16

5/16

7-1/2

15/16

4-1/4

1-3/16

2-3/4

1-3/16

3.50

3.60

3.57

13/16

3/8

2-1/2

7/8

3-9/16

4-1/8

1-1/8

2-3/4

1-1/8

2.88

2.97

2.94

3/4

5/16

3-1/2

8-1/2

15/16

4-13/16

5-1/2

1-1/4

2-13/16

1-1/4

4.10

4.07

7/8

3/8

15/16

6-7/16

7.5/16

1-7/16

3-1/2

1-7/16

5.56

5.69

5.66

15/16

7/16

15/16

5-5/16

6-3/16

1-5/16

4.50

4.60

4.57

15/16

7/16

7-9/16

8-1/2

1-9/16

3-1/2

1-9/16

6.63

6.75

6.72

1-1/16

1/2

1-3/16

12-3/4

1-15/16

10.75

10.92

10.88

1-5/16

1/2

13-1/2

1-1/8

9-11/16

10-5/8

1-3/4

8.63

8.75

8.72

1-1/4

1/2

1-1/4

14-3/8

2-3/16

4-1/2

2-3/16

12.75

12.92

12.88

1-9/16

1/2

23-1/2

1-7/16

18-1/2

3-7/16

2-1/2

16.19

16.16

1-3/4

1/2

1-3/8

15-3/4

16-1/4

3-1/8

2-1/4

14.18

14.14

1-5/8

1/2

1-9/16

19-7/8

3-13/16

5-1/2

2-11/16

18.20

18.18

1-15/16

1/2

1-7/8

26-1/8

27-1/4

4-3/8

3-1/4

24.25

2-1/2

1/2

27-1/2

1-11/16

4-1/16

5-11/16

2-7/8

20.25

20.20

2-1/8

1/2

Sizes of Inconel 718 Flanges

Standard	Size (Inches)	Outside Diameter (OD)	Bolt Circle Diameter (BCD)	Number of Bolt Holes	Bolt Hole Diameter	Thickness
ANSI B16.5	1/2″	95 mm	75 mm	4	14 mm	16 mm
ANSI B16.5	1″	120 mm	90 mm	4	14 mm	18 mm
ANSI B16.5	2″	165 mm	125 mm	4	18 mm	20 mm
ANSI B16.5	3″	200 mm	150 mm	4	22 mm	22 mm
ANSI B16.5	4″	250 mm	200 mm	8	22 mm	25 mm
ANSI B16.5	6″	300 mm	250 mm	8	25 mm	30 mm
ANSI B16.5	8″	350 mm	300 mm	8	25 mm	35 mm
ANSI B16.5	10″	400 mm	350 mm	8	28 mm	40 mm
ANSI B16.5	12″	450 mm	400 mm	12	30 mm	45 mm
ANSI B16.5	14″	500 mm	450 mm	12	30 mm	50 mm
ANSI B16.5	16″	550 mm	500 mm	12	33 mm	55 mm
ANSI B16.5	18″	600 mm	550 mm	12	33 mm	60 mm
ANSI B16.5	20″	650 mm	600 mm	12	36 mm	65 mm
ANSI B16.5	24″	750 mm	700 mm	16	36 mm	70 mm
ANSI B16.5	30″	900 mm	850 mm	16	39 mm	75 mm
ANSI B16.5	36″	1050 mm	1000 mm	16	42 mm	80 mm
ANSI B16.5	42″	1200 mm	1150 mm	20	45 mm	85 mm
ANSI B16.5	48″	1350 mm	1300 mm	20	45 mm	90 mm

Inconel Flanges Grades We Offer

Inconel Flanges

Inconel 600 Flanges

Inconel 625 Flanges

Inconel 718 Flanges

Manufacturing Process of Inconel 718 Flanges

Plate

Shear

Press

Inspection

Lathe

Drilling

Cleaning

Flange

Inspection

Analytic

Marking

Packing & Shipping

Applications of Inconel 718 Flanges

Industries, which require strong materials that can withstand high temperatures and stress levels frequently use Inconel 718 Alloy Flanges. Due to their strength and thermal stability, these flanges are essential for thrust reversers, afterburner components and jet engines in the aerospace industry. Heat exchangers, steam turbines, and nuclear reactors all use ASME SB564 Inconel 718 Flanges Equivalent in the power generation industry. Ni-Cr-Mo Inconel 718 Flanges are used in the oil and gas industry, especially offshore, for high-pressure piping, valves and manifolds. These flanges are perfect for reactors and pressure vessels in chemical processing facilities as they are resistant to oxidation and corrosion caused by chloride. Their compatibility with ANSI B16.5 and EN 1092 standards allows smooth integration in global infrastructure projects.

Offshore Industry

Nuclear Industries

Refineries

Ship Building

Aerospace

Pharmaceutical

Why Choose Inconel 718 Flanges from Midland Alloys Inc.

Midland Alloys Inc. is a prominent Indian manufacturer and exporter of high-grade ASME SB564 Alloy 718 Lap Joint Flanges worldwide. As an ISO certified company, we follow strict manufacturing procedures and accurate dimensional conformity, with Inconel 718 Flanges specifications. We provide total customization, such as cut-to-length, surface treatment, special schedules and end treatments, to serve your engineering requirements. Our global presence extends from the Gulf, Europe, Africa and Southeast Asia, backed by solid logistics, and qualified project management. Each batch is tested in-house for destructive and non-destructive testing, supplied with Mill Test Certificates (MTCs) and inspected by third-party inspectors. Whether small orders of prototypes or large orders, we ensure quality consistency, immediate dispatch, and technical support on a continuing basis. Our Inconel 718 DIN Flanges are marked as per ASTM/ASME standards, and comply fully with mechanical and chemical specifications, building trust through reliability and long-term business relationships.

FAQs

What is the cost of Inconel 718 Flanges per kg in India?

The cost of Inconel 718 Flanges in India is usually determined by the particular needs, comprehensive specifications and quality of raw materials utilized during production.

Is Inconel passivation required?

No, Inconel alloys such as 718 Inconel Flanges are not normally passivated, due to their innate oxide coating, which is corrosion resistant. Surface cleaning can be done for particular uses.

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ISO Certificate