Monel 400 Flanges

Monel 400 Flanges are precision-engineered nickel-copper components built to perform where corrosion resistance and mechanical strength matter most. Made from an alloy of roughly 63% nickel and 28–34% copper, along with controlled amounts of iron, manganese, silicon, and carbon, these flanges combine outstanding toughness with excellent ductility. Metracore Alloys manufactures each flange under strict quality control to serve industries where reliability under extreme conditions is non-negotiable.

Monel 400 Flange Supplier, Monel 400 Flange Manufacturer, Monel 400 flanges price

We at Metracore Alloys are a well established Monel 400 flange manufacturer and supplier, and we supply high quality flanges to the requirements of UNS N04400 and ASTM B564 / ASME SB564. The flanges are cold-rolled for exceptional resistance to seawater, steam, pitting and high velocity erosion; mechanical strength across a wide temperature range and low magnetic permeability. Every flange is forged, machined, heat treated & quality checked meticulously. All shipments come with EN 10204 3.1B certification, raw material test results, radiography, and third-party inspection documents, which guarantee full material traceability and compliance in critical industrial uses.

These Monel flanges are primarily used in offshore and marine industries where resistance to seawater is important. They are utilized in offshore construction, seawater desalination facilities and shipbuilding. Monel 400 flanges are a reliable option for harsh chemical conditions because they can easily handle hydrochloric acid, sulfuric acid, and hydrofluoric acid in chemical and hydrocarbon processing. Additionally, they are used in boiler feedwater heaters, pumps, valves, condensers, heat exchangers and other devices where corrosion and heat resistance are necessary. Ring Type Joint (RTJ) flanges provide safe, leak-proof connections for high-pressure applications. Monel 400 raw materials are forged or machined during the manufacturing process, then heat treated, final machined, and surface finished before quality assurance and packaging.

Monel 400 flat face flange, UNS N04400 Pipe Flange, B564 N04400 Flange

Each of our flanges come with certifications such as EN 10204/3.1B, raw material certificates, 100% radiography reports, and third-party inspection reports. Packaging is done carefully to prevent damage, using wooden cases, crates, or custom protective wrapping as per client requirements. As a trusted Monel 400 flange manufacturer and supplier, we deliver products that meet global standards with reliable performance across industries.

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Why Choose Monel 400 Flanges

Constant exposure to corrosive environments wears down standard piping components fast. Monel 400 flanges don’t follow that pattern. Their resistance to seawater, chemicals, acids, alkalis, and chloride-induced corrosion holds up where other materials fail, and that resistance pairs with solid mechanical strength, weldability, and stable performance across a wide temperature range. The result: longer service life and fewer maintenance cycles. Marine, offshore, oil & gas, chemical processing, power generation, and shipbuilding operations depend on these flanges for critical connections. Manufactured to ASTM B564 / ASME SB564 and available across multiple flange types and face forms, Metracore Alloys’ flanges cover a wide range of project specifications. Explore our flange solutions to find the right fit for your application.

Monel 400 Flanges Specification

Review the table below for detailed technical specifications and dimensional standards of Monel 400 flanges.

Types of Monel 400 Flanges

Manufacturing Types of Monel 400 Flanges

Monel 400 Flanges Face Forms

Reach out to Metracore Alloys for reliable Monel 400 Flanges solutions

Technical Details of Monel 400 Flanges

Equivalent Grades of ASTM B564 Monel 400 Flanges

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
Monel 400	2.4360	N04400	NW 4400	NA 13	МНЖМц 28-2,5-1,5	NU-30M	NiCu30Fe

Monel 400 Flange Chemical Composition

Nickel and copper form the main content of Monel 400’s chemical composition, with iron, manganese, silicon, carbon, and sulfur content held to tight limits. This balance is what drives the alloy’s corrosion resistance in demanding service environments. Find the full composition breakdown in the table below.

Grade	C	Mn	Si	S	Cu	Fe	Ni
Monel 400	0.30 max	2.00 max	0.50 max	0.024 max	28.00 – 34.00	2.50 max	63.00 min

Monel 400 Flanges Mechanical Properties

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2% Offset)	Elongation
Monel 400	8.8 g/cm³	1350 °C (2460 °F)	Psi – 80,000 , MPa – 550	Psi – 35,000 , MPa – 240	40 %

Dimensions of Monel 400 Flanges

Monel 400 Flanges Dimensions ‘DN’ (Nominal Diameter) in mm
INCH	DN	INCH	DN
1/2	15	12	300
3/4	20	14	350
1	25	15	375
1 1/4	32	16	400
1 1/2	40	18	450
2	50	20	500
2 1/2	65	24	600
3	80	28	700
4	100	30	750
5	125	32	800
8	200	36	900
10	250

Pressure Ratings of Monel ASTM B564 UNS N04400 Alloy Flanges

Nominal Diameter of ASTM B564 UNS N04400 Flange	Pressure Rating (PN) of Monel 400 Pipe Flange
Nominal BSP Pipe Size	PN6	PN10	PN16	PN25	PN40
DN 10	75	90	90	90	90
3/8″	50	60	60	60	60	Bolt circle (PCD)
	4 x 11	4 x 14	4 x 14	4 x 14	4 x 14	*
DN 15	80	95	95	95	95
1/2″	55	65	65	65	65	Bolt circle (PCD)
	4 x 11	4 x 14	4 x 14	4 x 14	4 x 14	*
DN 20	90	105	105	105	105
3/4″	65	75	75	75	75	Bolt circle (PCD)
	4 x 11	4 x 14	4 x 14	4 x 14	4 x 14	*
DN 25	100	115	115	115	115
1″	75	85	85	85	85	Bolt circle (PCD)
	4 x 11	4 x 14	4 x 14	4 x 14	4 x 14	*
DN 32	120	140	140	140	140
1 1/4″	90	100	100	100	100	Bolt circle (PCD)
	4 x 14	4 x 18	4 x 18	4 x 18	4 x 18	*
NOTE:*# of holes x diam. of holes “PCD” – Pitch Circle Diameter

Size of Monel 400 Flanges

Size in (In)	Size in (Mm)	No of Bolts	Bolt UNC Size	RF Stud Length	Stud ISO Size	Machine Flange Bolt Len
1/2	15	4	1/2	55	M14	50
3/4	20	4	1/2	65	M14	50
1	25	4	1/2	65	M14	55
1 ^1/2	40	4	1/2	70	M14	65
2	50	4	5/8	85	M16	70
3	80	4	5/8	90	M16	75
3 ^1/2	90	8	5/8	90	M16	75
6	150	8	3/4	100	M20	85
8	200	8	3/4	110	M20	90
10	250	12	7/8	115	M24	100
1 ^1/4	32	4	1/2	70	M14	55
2 ^1/2	65	4	5/8	90	M16	75
5	125	8	3/4	95	M20	85
16	400	16	1	135	M27	115
18	450	16	1 1/8	145	M30	125
20	500	20	1 1/8	160	M30	140

UNS N04400 Flanges Latest Price List

Product	FOB Price
Monel Flange ASTM B564	US $10–30 / Kilogram
Monel Blind Flanges	US $0.00001–999999 / Piece
Monel Flat Flange	—
Monel Forged Flanges	US $100–300 / Piece
Monel Weld Neck Flange 1.4 inch 150# RF Facing	—
Monel Nickel Alloy Flanges	US $0.00001–999999 / Piece
DIN 2656 ASTM B564 ASME SB564 Monel Flange	US $1–150 / Piece
Monel Threaded Flanges	US $10–118 / Piece
ASME B564 Monel Flange	—
ASTM B564 Monel Alloy Rings	US $0.00001–999999 / Piece
ASTM B564 Monel Industry Flange	US $1–500 / Piece
ASME B16.5 Forged Monel Flange	US $1–999 / Piece

Manufacturing Process of Monel 400 Flanges

Monel 400 Flanges Application

Monel 400 flanges deliver exceptional corrosion resistance and high-pressure reliability across the following demanding industrial applications and sectors.

Exporter, Manufacturer & Supplier of Monel 400 Flanges in various material and sizes.

FAQs

What are Monel 400 Flanges?

Monel 400 Flanges are pipe connectors made up of a unique alloy of nickel and copper, they are designed to give high tensile strength and excellent corrosion resistance in severe environments such as seawater, acids and chemical processing systems.

Which Monel 400 Flange types does Metracore Alloys supply?

Slip-on, socket weld, blind, weld neck, threaded/screwed, lap joint, long weld neck, spectacle blind, and reducing.

Do Monel 400 Flanges meet international standards?

Yes ASTM B564 / ASME SB564 and UNS N04400, with dimensional compliance to ANSI/ASME B16.5, B16.47, B16.48, BS4504, BS10, EN-1092, and DIN.

What face types come with Monel 400 Flanges?

Flat Face (FF), Raised Face (RF), Ring-Type Joint (RTJ), and Lap-Joint Face (LJF).

What size range is available?

1/2″ NB to 60″ NB, across Class 150# to 2500# and PN6 to PN64 pressure ratings.

Can Metracore Alloys produce custom Monel 400 Flanges?

Yes, custom dimensions, pressure ratings, and face types built to your project’s exact requirements.