Products > Hastelloy C276

PMI STEEL Hastelloy Alloy C276 (also known as Alloy C276), is a nickel-molybdenum-chromium-iron-tungsten alloy which is among the most corrosion-resistant alloys currently available. The high molybdenum content imparts resistance to localized corrosion such as pitting. The low carbon minimizes carbide precipitation during welding to maintain resistance to intergranular attack in heat affected zones of welding joints.Typical applications of HASTELLOY C276 include equipment components in chemical and petrochemical organic chloride processes and processes utilizing halide or acid catalysts.

Steel Grade:

Alloy C 276 / N10276 / Wr. 2.4819, ASTM B 564, SAE J 470c-1976

PMI STEEL Hastelloy C276 Bar

Nickel Alloy C 276 / N10276 / Wr. 2.4819

Product Description

The PMI Hastelloy C276 Bar is a high-performance nickel alloy specifically engineered to resist corrosion and high-temperature conditions in extreme environments. Its higher molybdenum and chromium content enhances the alloy’s resistance to chloride ion attack, while tungsten further improves its corrosion resistance. Hastelloy C276 is one of the few materials that can withstand the corrosion of moist chlorine gas, hypochlorite, and chlorine dioxide solutions. This alloy exhibits remarkable corrosion resistance to high concentrations of chloride salt solutions, such as ferric chloride and cupric chloride. As a result, its applications in the global chemical, oil and gas, pharmaceutical, and power industries are extensive, making it a preferred material for harsh applications by engineers and the pharmaceutical industry.

Applications of Hastelloy C276 :

Hastelloy C276 alloy is widely used in the chemical and petrochemical sectors, particularly in components and catalytic systems that come into contact with chlorinated organic substances. This material is especially suitable for use in high-temperature environments as well as in corrosive conditions involving inorganic and organic acids (such as formic and acetic acids) and seawater.

Material Properties

Corrosion Resistance:

- Exceptional resistance to strong acids (such as sulfuric acid, hydrochloric acid, and hydrofluoric acid) and chlorides.

- Exhibits outstanding stress corrosion cracking resistance in environments containing chloride ions, effectively preventing aging and damage of the material.

Thermal Stability:

- Capable of withstanding temperatures up to 1100°C, with stable mechanical properties and oxidation resistance.

- Maintains good strength and toughness in high-temperature working environments.

Machinability:

- Excellent machinability, suitable for various nickel alloy fabrication processes.

- Good weldability, allowing compatibility with multiple welding methods (such as TIG and MIG welding).

Main Chemical Composition

The elemental composition of PMI Hastelloy C276 is as follows:

- Nickel (Ni): Balance

- Molybdenum (Mo): 15.0% - 17.0%

- Chromium (Cr): 14.5% - 16.5%

- Iron (Fe): 4.0% - 7.0%

- Tungsten (W): 3.0% - 4.5%

- Other Elements: Strict control of elements like manganese, silicon, and cobalt to ensure the alloy’s superior stability.

This composition enables C276 to perform excellently in many corrosive environments and adapt to complex working conditions.

Mechanical Properties

- Tensile Strength: ≥ 620 MPa

- Yield Strength: ≥ 240 MPa

- Elongation: ≥ 40%

- Hardness: Brinell hardness approximately 150-300 HB

The above mechanical properties indicate that Hastelloy C276 possesses not only good mechanical strength but also high ductility. It exhibits high strength and toughness, making machining somewhat challenging; the deformation rate at 15% is approximately twice that of 18-8 stainless steel. Hastelloy alloys also exhibit a medium-temperature sensitization zone, with the tendency to sensitize increasing with the deformation rate. At elevated temperatures, Hastelloy alloys are prone to absorbing harmful elements that can decrease their mechanical properties and corrosion resistance.

Physical Properties

- Density: 8.89 g/cm³

- Melting Point: 1300°C - 1350°C

- Thermal Conductivity: 12.5 W/m·K

- Thermal Expansion Coefficient: 14.0 × 10⁻⁶ /K

- Resistivity: 1.0 × 10⁻⁶ Ω·m

These physical properties ensure material stability under thermal loads and effectively mitigate the impact of heating or cooling.

Key Performance Features

- Exceptional Stress Corrosion Cracking Resistance: Particularly outstanding in high-temperature environments with chloride ions, significantly reducing the likelihood of equipment failure.

- Wear Resistance: Maintains good surface integrity even under prolonged wear conditions.

- Heat Resistance: Preserves relatively stable mechanical properties and corrosion resistance in high-oxidative temperature environments.

The PMI Hastelloy C276 is widely used in harsh corrosive environments, such as in the chemical, petrochemical, flue gas desulfurization, pulp and paper, and environmental protection industries.

Functionality and Appearance

Functionality:

- Suitable for the fabrication of piping, containers, heat exchangers, and other equipment used in the chemical, petroleum, and pharmaceutical industries.

- Exhibits excellent performance in highly corrosive and high-temperature environments, ensuring the safety and reliability of equipment operation.

Appearance and Dimensions:

- Color: Metallic silver-gray, with a smooth appearance and metallic luster.

- Dimensions: Diameter ranges from 10mm to 350mm, with lengths customizable (0.5m to 6m) to meet varying customer needs.

Packaging Information

- Internal Packaging: Utilizes high-quality moisture-resistant materials to ensure products remain unaffected by humidity during transport and storage.

- External Packaging: Each alloy bar is packaged in reinforced wooden crates to facilitate storage and transportation.

- Labeling: Each package is labeled with the product type, specifications, production batch number, and inspection certificate to ensure traceability.

Product Applications

- Chemical Industry: Used for manufacturing corrosion-resistant reactors, evaporators, and pipelines, ensuring process safety.

- Oil and Gas: Applied in drilling, oil extraction, and transportation pipelines, maintaining corrosion resistance in high-temperature and high-pressure environments.

- Pharmaceutical and Food Processing: Complies with hygiene regulations, suitable for the production of drones, packaging, and pharmaceutical ingredients.

Best-Selling Attributes / Specifications

- Popular Specifications: Alloy bars with diameters of 15mm, 45mm, and 110mm are very popular in the market.

- Custom Options: Customers can select different lengths, diameters, and surface treatments according to specific requirements.

Product Comparison

Compared to other high-temperature alloys (such as Hastelloy C22 and Inconel 625), PMI Hastelloy C276 offers several significant advantages:

1. Superior Resistance to Copper Chloride: C276 exhibits enhanced stress corrosion cracking resistance in chloride environments, providing improved safety in fluctuating working conditions.

2. Broader Range of Applications: Suitable for a wider variety of chemical compositions, meeting more industrial standards.

3. Ease of Welding: Better machinability and weldability, allowing for quick assembly and replacement in various environments.

User Experiences

Linda S., Quality Control Manager, Aerospace Dynamics (Canada)

"The Hastelloy C-276 bars supplied by PMI have performed admirably in our chemical processing applications, with a corrosion rate of less than 0.01 mm/year in aggressive environments."

Desciption

Hastelloy C276 Chemical Component

Hastelloy C276 Mechanical Properties

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