ASTM A182 F36 Flanges Supplier in India

ASTM A182 F36 Flanges are constructed from highly alloyed nickel-copper-molybdenum low alloy steel and are specifically designed for high temperature and high pressure applications in power boilers, hydro-crackers, and heavy industry pipelines. The special a182 f36 alloy composition which comprises of Nickel, Copper, Molybdenum and Columbium micro alloys offers high yield strength, thermal stability and creep resistance at temperatures reaching 600°C. Our production of various line connections conforming to ASME B16.5 and B16.47 standard includes high stress a182 f36 weld neck flange, low pressure f36 slip on flange and dead end f36 blind flange variants ranging in Class 150 to Class 2500 grades. Our range of a182 f36 flanges comprises of normalized-tempered a182 f36 class 1 flange and high tensile a182 f36 class 2 flanges which offer excellent mechanical properties corresponding to the international equivalent standards of uns k21001, Werkstoff 15NiCuMoNb5 flange (1.6368). Solitaire Overseas is a globally recognized stockist, manufacturer, and exporter of high-precision industrial forgings and alloy piping components. We supply fully certified high-pressure piping solutions to international markets with 100% EN 10204 3.1 material test report traceability.

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Technical Data

Specification Chemical Composition Mechanical Properties

ASTM A182 F36 Flange Specification

Parameter	Specification
Material	ASTM A182 or ASME SA182 F36 Class 1 and Class 2, UNS K21001
Also known as	1.15Ni 0.65Cu Mo Cb flange, nickel copper molybdenum columbium flange, Class 1 and Class 2 flange
Dimension Standards	ASME B16.5 for NPS 1/2 to 24, ASME B16.47 for large weld neck and blind sizes, MSS SP 44
Facing	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Types	Weld neck, long weld neck, slip on, blind, spectacle blind, spacer, socket weld, RTJ
Production	Forged and heat treated to Class 1 or Class 2
Testing	Hardness test, PMI for nickel, copper, molybdenum and columbium, impact test on request, hydrostatic test on request
Certification	Mill Test Certificate EN 10204 3.1, 3.2 on request, third party inspection on request

Chemical Composition of ASTM A182 F36 Flanges

Nickel and copper add strength and toughness, and columbium lifts yield strength. Values below are in percent, and every limit is a range or a maximum.

Element	Limit (percent)	Element	Limit (percent)
Carbon (C)	0.10 to 0.17	Chromium (Cr)	0.30 max
Manganese (Mn)	0.80 to 1.20	Molybdenum (Mo)	0.25 to 0.50
Phosphorus (P)	0.030 max	Columbium / Niobium (Nb)	0.015 to 0.045
Sulphur (S)	0.025 max	Nitrogen (N)	0.020 max
Silicon (Si)	0.25 to 0.50	Aluminium (Al)	0.050 max
Nickel (Ni)	1.00 to 1.30	Vanadium (V)	0.02 max
Copper (Cu)	0.50 to 0.80

Mechanical Properties of A182 F36 Class 1 and Class 2

Property	Class 1	Class 2
Tensile strength, min	620 MPa (90 ksi)	660 MPa (95.5 ksi)
Yield strength, min	440 MPa (64 ksi)	460 MPa (66.5 ksi)
Elongation, min	15 percent	15 percent
Hardness	252 HBW max	252 HBW max
UNS number	K21001	K21001

Applications of ASTM A182 F36 Flanges

ASTM A182 Grade F36 Ni-Cu-Mo low-alloy steel flanges are specified for high-strength, elevated-temperature severe service:

Power Generation Boilers: Connects superheaters and steam headers using a182 f36 weld neck flange units for superior yield strength.
Refineries & Hydrocrackers: Secures high-pressure hydrogen process lines matching uns k21001 and 15NiCuMoNb5 flange standards.
Petrochemical Vessels: Installed in heavy-wall reactors requiring a182 f36 class 2 flange ratings for high thermal stresses.
High-Pressure Piping: Directs and isolates severe-duty flows via f36 slip on flange and f36 blind flange components (Class 150–2500).

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Frequently Asked Questions

What is ASTM A182 F36 flange material?

It is a forged low alloy steel with about 1.15 percent nickel, 0.65 percent copper, molybdenum and columbium, supplied in Class 1 and Class 2.

Is A182 F36 stainless steel?

No. Chromium is held to 0.30 percent maximum, so F36 is a low alloy steel and not a stainless grade.

What is the UNS number of A182 F36?

The forging carries UNS K21001.

What is the difference between F36 Class 1 and Class 2?

Class 2 is the higher strength level. Class 1 needs 620 MPa tensile and 440 MPa yield, Class 2 needs 660 MPa and 460 MPa.

What is the equivalent of A182 F36?

The matching pipe grade is A335 P36, and the nearest European designation is 15NiCuMoNb5 6 4. Check your project code before treating any grade as exact.

Does an F36 flange need PWHT?

A welded joint on F36 normally needs preheat, controlled heat input and PWHT as set by your piping code and qualified welding procedure.

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