Hastelloy C276 is an alloy that stands out due to its unique combination of elements: its main components are nickel, molybdenum, and chromium, with trace amounts of iron, tungsten, cobalt, and other elements. This combination of elements gives Hastelloy C276 exceptional properties, which are extended to the flanges made from it. The two most commonly used thread standards globally are BSP and NPT threads. Although their purposes are similar, they have different characteristics and applications.

Specifications of Hastelloy C276 Flanges

Hastelloy C276 Flange Standards

Material Standards: ASTM B564 (forged flanges), UNS N10276, Werkstoff Nr. 2.4819, etc.

Dimension Standards:

ASME B16.5 (for pipe flanges and flange fittings from NPS 1/2“ to NPS 24”)

ASME B16.47 (for large-diameter steel flanges from NPS 26“ to NPS 60”)

EN 1092 (European flange standard)

DIN (German standard)

JIS (Japanese standard)

Common Types of Hastelloy C276 Flanges

Chemical Composition of ASME SB 564 N10276 Flanges

· High nickel (Ni) content: Ensures the stability of the alloy in reducing media, forming the foundation for corrosion resistance;

· Chromium (Cr): Provides oxidation resistance and corrosion resistance in oxidizing media (such as nitric acid);

· Molybdenum (Mo) + Tungsten (W): Significantly enhances resistance to localized corrosion (pitting corrosion, crevice corrosion), especially in chloride-containing environments;

· Low carbon (C): Prevents the formation of carbides between carbon and chromium, thereby preventing intergranular corrosion.

ASTM B564 Hastelloy C276 Mechanical Properties

Equivalent Grades of Hastelloy C276 Flanges

Key Features

✅ Exceptional corrosion resistance: exhibits outstanding resistance to strong oxidizing and reducing media such as hydrochloric acid, sulfuric acid, chlorides, and chlorine gas.

✅ Superior mechanical properties: maintains stable strength and toughness even under high-temperature, high-pressure conditions or in strongly acidic environments.

✅ Strong resistance to localized corrosion: Effectively resists pitting corrosion, crevice corrosion, and intergranular corrosion.

✅ Good weldability: Easy to process and weld, with no reduction in corrosion resistance in the welded area.

✅ High-temperature performance: Hastelloy C276 exhibits excellent stability, particularly maintaining strength and structural integrity at high temperatures around 700°C.

Hastelloy C276 Flanges Dimension

Application Scenarios

Hastelloy C276 flanges, renowned for their exceptional corrosion resistance, are primarily used in extreme environments where conventional materials cannot withstand the conditions. Typical applications include:

Chemical and Petrochemical Industries

Environmental Protection Industry

Pharmaceutical and Food Industries

Marine Engineering

Nuclear Industry

Installation and Maintenance Guidelines

Avoid contact between dissimilar metals: When in contact with metals of lower potential, such as carbon steel, galvanic corrosion may occur. Insulating gaskets (e.g., PTFE) or coatings should be used to isolate the metals;

Gaskets selection: Prioritize gaskets with matching corrosion resistance, such as PTFE or metal-backed gaskets, to prevent gasket material corrosion by the medium and subsequent leakage;

Cleaning and Pre-Treatment: Before installation, remove oil stains and oxide scale from the flange surface using a stainless steel wire brush or specialized cleaner to prevent impurities from affecting sealing performance;

Torque Control: Apply tightening torque according to flange specifications and pressure ratings in accordance with standards to avoid over-tightening, which can cause flange deformation or bolt breakage.

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

Hastelloy C276 Flanges Exported Countries

We Export  Hastelloy C276 Flanges to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc

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