Monel K500 Flanges – Manufacturer

Midland Alloys Inc. is a trusted Indian manufacturer and global supplier of Monel K500 Flanges, offering precision-engineered solutions built for extreme operating conditions. These flanges are made from nickel-copper alloy K500, a precipitation-hardened grade known for its excellent corrosion resistance, enhanced tensile strength, and superior fatigue performance. Monel K500 complies with DIN 2.4375, WERKSTOFF Nr. 2.4375 and UNS N05500 standards and is designed to function in challenging chemical, and marine environments. With a chemical composition of roughly 63% nickel, 27–33% copper, 2.3–3.15% aluminum and 0.35–0.85% titanium, monel K500 has remarkable hardening properties. Key mechanical properties include tensile strength up to 965 MPa, yield strength around 690 MPa, elongation of 20%, and a reduction of area up to 45%, depending on tempering. These characteristics make ASTM B564 Monel K500 Flanges a reliable choice for critical systems exposed to corrosion, pressure, and mechanical wear.

Benefits of Monel K500 Flanges

The strong mechanical and chemical features of Monel K500 Flanges, which offer enduring performance in demanding service conditions.

Resists corrosion from salt spray, and seawater.
Maintains its high strength, when subjected to heat and mechanical stress.
prevents stress cracking in marine systems caused by chloride.
Provides outstanding resistance to wear in assemblies, that are moving or bearing loads.
Works effectively in connections with high vibration and pressure.
It is non-magnetic in the annealed and quenched states
Suitable for harsh acidic and alkaline media
Allows for steady operation under various flow and temperature conditions.

Monel K500 Flanges Specification

Types of Monel 400 Flanges

There are numerous varieties of Monel 400 flanges to accommodate different piping systems and pressure ratings. Depending on the sealing technique, load capacity and installation style each type provides unique advantages.

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 Monel K500 Flanges Needs

Contact us today to discuss how Monel K500 Flange 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

Monel Alloy K500 Flanges Equivalent Grade

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
Monel K500	2.4375	N05500	–	–	–	–	–

Chemical Composition of K500 Monel Flange

Grade	C	Mn	Si	Cu	S	Ti	Ni	Al	Fe
Monel K500	0.25 max	1.5 max	0.5 max	27.0 – 33.0	0.010 max	0.35 – 0.85	63.0 min	2.3 – 3.15	0.5 – 2

Monel K500 Flanges Mechanical Properties

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Monel K500	8.44 g/cm3	1350 °C (2460 °F)	Psi – 160000 , MPa – 1100	Psi – 115000 , MPa – 790	20 %

Monel K500 BLIND Flange Dimension

Size in Inch	Size in mm	Outer Diameter	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	Bore	RF Diameter	RF Height	PCD	Weld Face
		A	B	C	D	E	F	G	H	I	J
1/2	15	90	9.6	30	21.3	46	Refer Note	34.9	2	60.3	1.6
3/4	20	100	11.2	38	26.7	51		42.9	2	69.9	1.6
1	25	110	12.7	49	33.4	54		50.8	2	79.4	1.6
1 1/4	32	115	14.3	59	42.2	56		63.5	2	88.9	1.6
1 1/2	40	125	15.9	65	48.3	60		73	2	98.4	1.6
2	50	150	17.5	78	60.3	62		92.1	2	120.7	1.6
2 1/2	65	180	20.7	90	73	68		104.8	2	139.7	1.6
3	80	190	22.3	108	88.9	68		127	2	152.4	1.6
3 1/2	90	215	22.3	122	101.6	70		139.7	2	177.8	1.6
4	100	230	22.3	135	114.3	75		157.2	2	190.5	1.6
5	125	255	22.3	164	141.3	87		185.7	2	215.9	1.6
6	150	280	23.9	192	168.3	87		215.9	2	241.3	1.6
8	200	345	27	246	219.1	100		269.9	2	298.5	1.6
10	250	405	28.6	305	273	100		323.8	2	362	1.6
12	300	485	30.2	365	323.8	113		381	2	431.8	1.6
14	350	535	33.4	400	355.6	125		412.8	2	476.3	1.6
16	400	595	35	457	406.4	125		469.9	2	539.8	1.6
18	450	635	38.1	505	457.2	138		533.4	2	577.9	1.6
20	500	700	41.3	559	508	143		584.2	2	635	1.6
24	600	815	46.1	663	610	151		692.2	2	749.3	1.6

Sizes of Monel K500 Flanges

Normal Sizes In inch	Dimension	Flanges Dimensional Sizes 1/2 inch. to 2 1/2 inch.
		Class 125 Class 150		Class 300		Class 400		Class 600		Class 900		Class 1500		Class 2500
		inch.	mm	inch.	millimeter	inch.	mm	inch.	mm	inch.	mm	inch.	mm	inch		mm
1/2	A	3 1/2	88.9	3 3/4	95.2	3 3/4	95.2	3 3/4	95.2	4 3/4	121	4 3/4	121	5 1/4	133.4
	b	7/16	11.1	9/16	14.3	9/16	14.3	9/16	14.3	7/8	22.2	7/8	22.2	1 3/16	30.2
	D2	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9
	D1	2 3/8	60.3	2 5/8	66.7	2 5/8	66.7	2 5/8	66.7	3 1/4	82.6	3 1/4	82.6	3 1/2	88.9
	n	4	4	4	4	4	4	4	4	4	4	4	–	4	44
	d	5/8	15.9	5/8	15.9	5/8	15.9	5/8	15.9	7/8	22.2	7/8	22.2	7/8	22.2
3/4	A	3 7/8	98.4	4 5/8	117.5	4 5/8	117.5	4 5/8	117.5	5 1/8	130	5 1/8	130	5 1/2	139.7
	b	1/2	12.7	5/8	15.9	5/8	15.9	5/8	15.9	1	25.4	1	25.4	1 1/4	31.8
	D2	1 11/16	42.9	1 11/16	42.9	1 11/16	42.9	1 11/16	42.9	1 11/16	42.9	1 11/16	42.9	1 11/16	42.9
	D1	2 3/4	69.8	3 1/4	82.5	3 1/4	82.5	3 1/4	82.5	3 1/2	88.9	3 1/2	88.9	3 3/4	95.2
	n	4	4	4	4	4	4	4	4	4	4	4	–	4	44
	d	5/8	15.9	3/4	19	3/4	19	3/4	19	7/8	22.2	7/8	22.2	7/8	22.2
1	A	4 1/4	108	4 7/8	123.8	4 7/8	123.8	4 7/8	123.8	5 7/8	149.2	5 7/8	149.2	6 1/4	159
	b	9/16	14.3	11/16	17.5	11/16	17.5	11/16	17.5	1 1/8	28.6	1 1/8	28.6	1 3/8	34.9
	D2	2	50.8	2	50.8	2	50.8	2	50.8	2	50.8	2	50.8	2	50.8
	D1	3 1/8	79.4	3 1/2	88.9	3 1/2	88.9	3 1/2	88.9	4	102	4	102	4 1/4	108
	n	4	4	4	4	4	4	4	4	4	4	4	4	4	4
	d	5/8	15.9	3/4	19	3/4	19	3/4	19	1	25.4	1	25.4	1	25.4
1 1/4	A	4 5/8	117.5	5 1/4	133.4	5 1/4	133.4	5 1/4	133.4	6 1/4	159	6 1/4	159	7 1/4	184.2
	b	5/8	15.9	3/4	19	13/16	20.6	13/16	20.6	1 1/8	28.6	1 1/8	28.6	1 1/2	38.1
	D2	2 1/2	63.5	2 1/2	63.5	2 1/2	63.5	2 1/2	63.5	2 1/2	63.5	2 1/2	63.5	2 1/2	63.5
	D1	3 1/2	88.9	3 7/8	98.4	3 7/8	98.4	3 7/8	98.4	4 3/8	111	4 3/8	111	5 1/8	130
	n	4	4	4	4	4	4	4	4	4	4	4	4	4	4
	d	5/8	15.9	3/4	19	3/4	19	3/4	19	1	25.4	1	25.4	1 1/8	28.6
1 1/2	A	5	127	6 1/8	155.6	6 1/8	155.6	6 1/8	155.6	7	177.8	7	177.8	8	203
	b	11/16	17.5	13/16	20.6	7/8	22.2	7/8	22.2	1 1/4	31.8	1 1/4	31.8	1 3/4	44.5
	D2	2 7/8	73 98	2 7/8	73	2 7/8	73	2 7/8	73	2 7/8	73	2 7/8	73	2 7/8	73
	D1	3 7/8	4	4 1/2	114	4 1/2	114	4 1/2	114	4 7/8	124	4 7/8	124	5 3/4	146
	n	4	4	4	4	4	4	4	4	4	4	4	4	4	4
	d	5/8	. 15.9	7/8	22.2	7/8	22.2	7/8	22.2	1 1/8	28.6	1 1/8	28.6	1 1/4	31.8
2	A	6	152.4	6 1/2	165.1	6 1/2	165.1	6 1/2	165.1	8 1/2	215.9	8 1/2	215.9	9 1/4	234.9
	b	3/4	19	7/8	22.2	1	25.4	1	25.4	1 1/2	38.1	1 1/2	38.1	2	50.8
	D2	3 5/8	92.1	3 5/8	92.1	3 5/8	92.1	3 5/8	92.1	3 5/8	92.1	3 5/8	92.1	3 5/8	92.1
	D1	4 3/4	121	5	127	5	127	5	127	6 1/2	165.1	6 1/2	165.1	6 3/4	171
	n	4	4	8	8	8	8	8	8	8	8	8	8	8	8
	d	3/4	19	3/4	19	3/4	19	3/4	19	1	25.4	1	25.4	1 1/8	28.6
2 1/2	A	7	177.8	7 1/2	190.5	7 1/2	190.5	7 1/2	190.5	9 5/8	244	9 5/8	244	10 1/2	266.7
	b	7/8	22.2	1	25.4	1 1/8	28.6	1 1/8	28.6	1 5/8	41.3	1 5/8	41.3	2 1/4	57.2
	D2	4 1/8	104.8	4 1/8	104.8	4 1/8	104.8	4 1/8	104.8	4 1/8	105	4 1/8	105	4 1/8	105
	D1	5 1/2	139.7	5 7/8	149.2	5 7/8	149.2	5 7/8	149.2	7 1/2	190.5	7 1/2	190.5	7 3/4	197
	n	4	4	8	8	8	8	8	8	8	8	8	8	8	8
	d	3/4	19	7/8	22.2	7/8	22.2	7/8	22.2	1 1/8	28.6	1 1/8	28.6	1 1/4	31.8

Monel Flanges Grades We Offer

Monel Flanges

Monel 400 Flanges

Monel K500 Flanges

Manufacturing Process of Monel K500 Flanges

Plate

Shear

Press

Inspection

Lathe

Drilling

Cleaning

Flange

Inspection

Analytic

Marking

Packing & Shipping

Applications of Monel K500 Flanges

DIN 2.4375 Monel K500 flanges are suited for service in offshore platforms, marine propulsion systems, and seawater piping, where exposure to saltwater and turbulence is routine. In oil and gas, these flanges are used in sour gas processing, valve assemblies, and drilling hardware. The chemical sector employs Monel Alloy K500 Flanges in reactors, pumps, and pipe networks handling caustic, acidic, and chlorinated media. They are also usedin turbine blades, shafts, and storage tanks for power generation. Their durability under dynamic loads makes them suitable for defence, aerospace, and shipbuilding applications that require extended operational life.

Offshore Industry

Nuclear Industries

Refineries

Ship Building

Aerospace

Pharmaceutical

Difference between Monel K500 Flanges vs Monel 400 Flanges

Monel K500 Flanges differ from Monel 400 Flanges primarily in mechanical properties. Although both alloys are resistant to corrosion in the same environments, Monel K500 has considerably greater tensile and yield strength due to age-hardening from aluminium and titanium additions. K500 is also more resistant to erosion and wear in high-velocity applications. Monel 400, being more ductile and softer, can be shaped and welded but does not handle pressure and mechanical stress well. When strength and corrosion resistance are both needed in demanding applications, however, K500 is the material of choice.

Why Choose Midland Alloys Inc. for Monel Alloy UNS N05500 Flanges

Midland Alloys Inc. is a prominent Indian manufacturer and exporter of ASTM B564 UNS N05500 Blind Flange. As an ISO certified company we provide quality products along with advanced in-house testing. With the ability to customize face types, pressure classes, and end preparations, we ensure complete conformity to mechanical and dimensional standards for all of our Monel alloy UNS N05500 flanges. Each product is tested internally using PMI, UT, and tensile methods, and third-party inspection is available on request. Serving markets across Europe, the Gulf, Southeast Asia, and Africa, we provide full documentation, fast logistics, and batch-wise traceability. Our flanges come with Mill Test Certificates (MTC) as per ASTM/ASME standards, verifying both chemical composition and mechanical values. From small lots to bulk shipments, our project-specific solutions focus on durability, timely delivery, and trusted partnerships.

FAQs

What affects the Monel K500 flange price per kg in India?

Costs of raw materials, machining complexity, size range, and necessary certifications all affect the pricing. The higher strength and corrosion resistance of the Monel K500 flange are reflected in its price when compared to other nickel alloys.

Are Monel DIN 2.4360 spectacle blind flanges available in threaded design?

Although isolation systems are the main application for Monel DIN 2.4360 spectacle blind flanges, we also provide Monel Alloy K500 Threaded Flange versions according to project requirements.

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