We specialize in the production of a wide range of Hastelloy alloys, including Hastelloy C, C-276, C-2000, C-22, B-2, B-3 and more. Our Hastelloy alloys provide outstanding corrosion resistance and thermal stability, making them widely used in severe industrial environments like aerospace, chemical processing, and etc. Among them, Hastelloy B2 and C276 are two popular nickel-based alloys. While both are high-performance materials, they differ significantly in chemical composition, corrosion resistance, mechanical strength, toughness, and weldability. Below, we’ll take a closer look at the key differences between these two alloys.

Introduction to Hastelloy B2 vs C276

Hastelloy B-2 (UNS N10665, Werkstoff 2.4617) is a nickel-molybdenum alloy primarily composed of nickel (Ni) and molybdenum (Mo), with very low carbon and silicon content. It provides outstanding resistance to reducing environments, particularly strong hydrochloric acid and other highly corrosive reducing media. Its excellent corrosion resistance, combined with good mechanical strength and weldability, makes it ideal for many applications involving severe chemical conditions, like chemical reactors, heat exchangers, marine vessels, petroleum refining, and wastewater treatment plants, especially where strong reducing acids are present.

Hastelloy C-276 (UNS N10276, W. Nr. 2.4819) is nickel-molybdenum-chromium alloy. It contains nickel, molybdenum, chromium, and small amounts of iron and tungsten. They have excellent corrosion resistance, high-temperature performance, and mechanical strength, as well as outstanding toughness, strength, and good weldability. It is designed to resist corrosion in strong acids, chlorides, oxides, and other extreme environments. It is widely used in industries such as petrochemicals, chemical processing, energy, and metallurgy. Therefore, it is particularly suitable for environments with both oxidizing and reducing substances, including flue gas desulfurization systems, chemical processing plants, and nuclear waste treatment sectors.

Chemical Composition of Hastelloy B2 vs C276

As can be seen from the following table, As shown in the table, C-276 contains more chromium and tungsten, giving it excellent resistance to oxidation and crevice corrosion, making it ideal for oxidizing environments. B2, with high molybdenum and low chromium, is designed for strong reducing acids like hydrochloric and hydrofluoric acid, but it can corrode in oxidizing conditions. So, C-276 offers better overall corrosion resistance and wider use, while B-2 is better for specific reducing environments.

Physical Properties of Hastelloy B2 vs C276

Hastelloy B2 is denser and has a fixed melting point, which helps with temperature control and energy efficiency. C276 is lighter and has a wider melting range, offering better thermal stability, making it more suitable for high-temperature and weight-sensitive applications like aerospace.

Mechanical properties of Hastelloy B2 vs C276

Hastelloy B2 is denser and has a fixed melting point, which helps with temperature control and energy efficiency. C276 is lighter and has a wider melting range, offering better thermal stability, making it more suitable for high-temperature and weight-sensitive applications like aerospace.

Corrosion Resistance of Hastelloy B2 vs C276

Hastelloy B2 alloy offers excellent corrosion resistance in many reducing environments, especially hydrochloric acid of any concentration and temperature under normal pressure. In oxygen-free conditions, it also performs well against moderate sulfuric acid, all levels of phosphoric acid, and high-temperature organic acids like acetic and formic acids. It also resists bromic acid, hydrogen chloride gas, and halide catalysts. Therefore, Hastelloy B-2 is widely used in tough chemical and petrochemical processes, such as hydrochloric acid distillation, ethylbenzene alkylation, and low-pressure acetic acid production.

Hastelloy C276 exhibits excellent corrosion resistance to most corrosive media in both oxidizing and reducing atmospheres. It has outstanding resistance to pitting, crevice corrosion, and stress corrosion. It is one of the few materials capable of withstanding corrosion from moist chlorine, hypochlorite, and chlorine dioxide solutions. It also shows remarkable corrosion resistance to high-concentration chloride salt solutions, such as ferric chloride and cupric chloride.

Features of Hastelloy B2 vs C276

Hastelloy B2:

• Controls iron and chromium at minimum levels to prevent β phase Ni₄Mo formation.
• Excellent corrosion resistance in reducing environments.
• Very good resistance to moderate concentrations of sulfuric acid and many non-oxidizing acids.
• Strong resistance to chloride-induced stress corrosion cracking (SCC).
• Outstanding resistance to various organic acids.

Hastelloy C276:

• Excellent corrosion resistance
• Outstanding high-temperature performance
• Good mechanical properties
• Excellent weldability

Application of Hastelloy B2 vs C276

Hastelloy B2 nickel-based alloy is widely used in many harsh environments due to its excellent heat resistance and corrosion resistance. It has broad applications in chemical, petrochemical, energy production, and pollution control fields, especially in industries involving H₂SO₄, HCl, H₃PO₄, CH₃COOH, etc.

Hastelloy C-276 alloy is widely applied in chemical and petrochemical sectors, including in components and catalytic systems that contact chloride-based organic substances. It’s highly suitable for high-temperature environments, mixed-impurity inorganic/organic acids (e.g., formic acid, acetic acid), and seawater corrosion.

Cost of Hastelloy B2 vs C276

Overall, Hastelloy C276 generally has a higher cost than Hastelloy B2 under identical specifications and quality criteria. Still, the specific price may differ based on market volatility, order volume, processing demands, and other practical conditions.

Hastelloy B2 vs C276: Choose the Better One

While Hastelloy B2 and Hastelloy C276 are both high-performance corrosion-resistant nickel alloys with high nickel and molybdenum content, they have key differences in performance and uses:

• Hastelloy B2 excels at resisting reducing corrosion, making it ideal for chemicals like hydrochloric and sulfuric acid. It works well in medium or low-temperature settings.
• Hastelloy C276 protects against extreme corrosion and oxidation, handles heat up to ~1370°C, and is better at resisting pitting/crevice corrosion and easier to weld.
• You should choose between them by considering their specific environment (corrosion type, temperature) and budget to pick the best alloy.

Professional and Reliable Hastelloy B2 and C276 Supplier

We are specialized manufacturers of Hastelloy B2 and C276 materials, dedicated to producing a wide range of Hastelloy alloys. Our product lineup includes various forms, such as sheets, plates, pipes, bars, fittings, and forgings. We can customize products to comply with international standards (like ASTM, ASME, ISO). If you have any requirements, please contact us immediately.

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Hastelloy C22 and C276 are two crucial materials in the Hastelloy alloy series. They both have excellent corrosion resistance in severe environments. Although both alloys have high-performance characteristics, there are certain differences in chemical composition, corrosion resistance, mechanical properties, high-temperature resistance, application fields, and costs. We specializes in producing pipe fittings, flanges, bolts and other products with Hastelloy C22 and C276 materials. And we are committed to providing customers with reliable and excellent corrosion-resistant alloy solutions. Here, we will compare Hastelloy C22 and C276 in detail. This will help you understand their differences and choose the right alloy for actual application.

Hastelloy C22 and C276 Overview Difference

Hastelloy C276 is a high-performance nickel-chromium-molybdenum alloy. It contains about 57% nickel, 16% chromium, and 16% molybdenum, along with iron, tungsten, and cobalt. It is identified as UNS N10276. C276 is often used in strong acid environments like sulfuric acid, hydrochloric acid, and chloride solutions.

Hastelloy C22 was created to improve the corrosion resistance of C276 in the welded area. It is also a nickel – chromium – molybdenum alloy, containing about 56% nickel, 22% chromium, 13% molybdenum, and small amounts of iron, tungsten, and cobalt. Its standard designation is UNS N06022. Compared to C276, C22 has better and more complete corrosion resistance. It also resists pitting, crevice corrosion, intergranular corrosion, and stress corrosion cracking much better.

Hastelloy C22 and C276 Chemical Composition Difference

From the table, we can see that Hastelloy C22 has a higher chromium content, which makes it more resistant to corrosion in oxidizing environments. Meanwhile, Hastelloy C276 has more molybdenum, tungsten, and iron, giving it better corrosion resistance in reducing conditions and strong acids, especially at high temperatures.

Hastelloy C276 and C22 Physical Properties Difference

Hastelloy C276 and C22 have nearly identical densities, but C276 has a slightly higher melting point. This allows it to maintain excellent corrosion resistance in higher temperatures and more aggressive chemical environments, making it more stable and better suited for high-temperature applications.

Hastelloy C276 and C22 Mechanical properties Difference

In the annealed state, C276 has a yield strength of 41 ksi (345 MPa), but its strength can be increased through pilgering. It also maintains excellent toughness at low temperatures. C22 is typically supplied in the annealed condition with a minimum yield strength of 45 ksi. However, it can be cold worked to achieve even higher strength.

Hastelloy C276 and C22 Corrosion Resistance Difference

Hastelloy C-22 has high chromium and molybdenum content, providing excellent resistance to corrosion in oxidative environments. It is particularly resistant to localized corrosion from chlorides, such as pitting, crevice corrosion, and stress corrosion cracking. However, its resistance in high-temperature and reducing environments is slightly lower than that of C276.

Hastelloy C-276 has higher molybdenum, tungsten, and iron content, offering improved resistance to reducing corrosive environments, such as those containing hydrogen and hydrogen sulfide. It is ideal for a wider range of corrosive conditions, particularly in reducing and high-temperature environments.

Hastelloy C276 and C22 High-Temperature Resistance Difference

Hastelloy C276 has excellent oxidation resistance at high temperatures (up to 1900°F / 1038°C), making it ideal for extreme high-temperature and oxidative environments, such as in the chemical, oil, and aerospace industries. 

Hastelloy C22 is suitable for medium to high-temperature conditions (around 1500°F / 815°C), it excels in environments with chlorides or oxidizing acids. However, its high-temperature oxidation resistance is slightly lower than that of C276.

Hastelloy C276 and C22 Application Difference

Hastelloy C276 is mainly used in high – temperature, highly acidic, and reducing corrosive environments. It’s widely applied in the oil and gas, chemical processing, oil refining, pharmaceutical, and paper industries. In upstream oil and gas operations, it is commonly used for tubing, casing, and liners, as it can withstand severe corrosion from H₂S, CO₂, and chlorides.In addition, it is used in marine environments for components such as valves, pumps, and propellers. Its ability to resist biofouling also makes it ideal for heat exchangers.

Hastelloy C22 is more suitable for oxidizing media, particularly in high temperatures and chloride-containing conditions. In the chemical and petrochemical sectors, it’s frequently applied to parts that touch organic materials with chlorides and to catalytic systems. It is especially suitable for high temperatures and corrosive conditions involving impure acids like formic, acetic, and even seawater.

Hastelloy C276 and C22 Cost and Performance Difference

C276 is easier to source, with more stock and a wider range of sizes. C22 is harder to find, with only a few suppliers carrying it. While C22 offers better performance, C276 is also suitable for most applications. The chemical composition of C22 and C276 is similar, and since C22 has a lower density (8.7 vs. 8.9), it should be more affordable. But because C22 isn’t produced or supplied on a large scale, its price is higher than that of C276. C276 is more cost-effective in most cases. While C22 performs well in highly oxidizing conditions, its higher price and limited availability make it less economical overall.

Your Trustworthy Hastelloy C276 and C22 Supplier

Overall, both C276 and C22 offer distinct advantages, making them suitable for various applications depending on specific project or industry needs. Both alloys offer excellent corrosion resistance, but there are still some differences between them. Therefore, it’s important to do some research for you to choose the right grade that fits your needs and provides the best protection against corrosion or damage. We are a trusted and experienced manufacturer specializing in high-performance alloy materials. Our core products include pipe fittings, flanges, bolts, and custom components made from Hastelloy C22 and C276. All products are manufactured to meet international standards, with full customization available to suit specific project requirements. We welcome inquiries and cooperation worldwide.

The post Difference Between Hastelloy C22 and C276 appeared first on Quality Manufacturer of Industrial Pipe Fittings.

What is Hastelloy C276 material?

Hastelloy C276 is a nickel-molybdenum-chromium alloy with excellent corrosion resistance in severe environments. It is widely used in chemical processing, marine, and pollution control applications due to its exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking.

Key Features

✔ Superior Corrosion Resistance: Highly resistant to a wide range of aggressive chemicals, including oxidizing and reducing agents.
✔ Excellent Pitting and Crevice Corrosion Resistance: Ideal for harsh environments.
✔ Outstanding Stress Corrosion Cracking Resistance: Performs well in chloride-containing environments.
✔ Good Fabricability & Weldability: Can be welded using standard methods like TIG and MIG.
✔ High-Temperature Performance: Maintains mechanical strength in elevated temperatures.

Corrosion Resistance – Hastelloy C276

Hastelloy C276 is one of the most corrosion-resistant alloys available, offering superior protection in highly aggressive environments, including oxidizing, reducing, acidic, and chloride-rich conditions.

1. Types of Corrosion Resistance

✔ Pitting & Crevice Corrosion Resistance

Outstanding resistance to pitting and crevice corrosion, even in highly acidic and chloride-containing solutions.

Performs better than stainless steel (316, 904L, Duplex, Super Duplex) in aggressive environments.

✔ Stress Corrosion Cracking (SCC) Resistance

Highly resistant to chloride-induced stress corrosion cracking (SCC).

Suitable for seawater, chemical plants, and offshore applications.

✔ Uniform Corrosion Resistance

Provides protection in strong acids (HCl, H₂SO₄, HNO₃, H₃PO₄, HF, etc.).

Resistant to both oxidizing and reducing agents, making it more versatile than stainless steels and other nickel alloys.

✔ Intergranular Corrosion Resistance

Low carbon content (C ≤ 0.01%) minimizes carbide precipitation, preventing intergranular attack in welded structures.

Does not require post-weld heat treatment (PWHT).

✔ Resistance to Wet Chlorine & Chlorine Dioxide

Exceptional resistance to chlorine gas, wet chlorine, and chlorine dioxide, making it ideal for chemical and pulp & paper industries.

What is the ASTM standard for Hastelloy C276?

Hastelloy C276 is covered by several ASTM standards, depending on the product form (plates, pipes, tubes, bars, etc.). Below is a list of relevant ASTM specifications:

Key Notes:

ASTM B575 is the most commonly referenced standard for Hastelloy C276 in plate form.

ASTM B622 & B619 are widely used for seamless and welded pipes, respectively.

ASTM B366 is crucial for fittings like elbows, tees, and reducers.

Hastelloy C276 Chemical Composition

Hastelloy C276 Physical Properties

Hastelloy C276 Mechanical Properties

Equivalent Grades

What is the grade of Hastelloy material?

1. Common Hastelloy Grades & Their Applications

Is Hastelloy harder than stainless steel?

Hastelloy and stainless steel are both widely used in corrosion-resistant applications, but Hastelloy is generally harder and stronger than most stainless steel grades.

1. Hardness Comparison (Brinell Hardness – HB & Rockwell Hardness – HRB/HRC)

Key Takeaways:

Hastelloy C-series (C276, C22) is harder than 304 and 316 stainless steel.

Hastelloy is softer than hardened martensitic stainless steels like 410 & 17-4 PH.

Hastelloy alloys are generally stronger, with superior mechanical properties.

2. Strength & Durability Comparison

Key Takeaways:

Hastelloy has a higher tensile & yield strength than stainless steel.

Better corrosion resistance, especially in harsh environments (acidic, chloride-rich, and high-temperature conditions).

Hastelloy is more expensive but provides longer durability and reliability in extreme environments.

Fabrication and Heat Treatment

Annealing

HASTELLOY(r) C276 is generally used in the solution treated condition. This alloy is soaked at 1121°C (2050°F) and then quenched in a rapid manner.

Cold Working

Conventional cold working procedures are used for cold working HASTELLOY(r).

Welding

HASTELLOY(r) C276 is capable of being welded by the commonly used welding methods. During the welding process excessive input of heat should be avoided. For corrosive applications this alloy is capable of being used in the “as-welded” condition without the need for more heat treatment.

Forging

Conventional methods are used to forge or hot-upset HASTELLOY(r) C276.

Forming

HASTELLOY(r) C276 can be formed by being cold worked using conventional techniques.

Machinability

HASTELLOY(r) C276 has good machinability characteristic.

Heat Treatment

HASTELLOY(r) C276 is solution heat treated at 1121°C (2050°F) and then quenched rapidly. In case of forging or hot forming, the parts should first be solution heat treated before usage.

Hardening

HASTELLOY(r) C276 is cold worked to be hardened.

Hot Working

Super alloy HASTELLOY(r) C276 is capable of being extruded or hot formed. After the hot forming process, this alloy should be solution heat treated.

Aging

Aging is not performed for HASTELLOY(r) C276 that is utilized in a solution treated condition.

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 Material Exported Countries

We Export Hastelloy C276 Material 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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