Gnee Steel is a professional manufacturer of various Hastelloy C276 alloys, nickel-based alloys, Hastelloy alloys, and high-temperature alloy materials. Founded in 2008, the company specializes in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and the company can provide customized alloy material solutions according to customer needs. If you need to inquire about alloy material prices or customized solutions, please feel free to contact our sales staff.
Difference Between Hastelloy C22 and C276 Alloy
Difference Between Hastelloy C22 and C276 Alloy
Hastelloy C22 (22Cr-13Mo) and C276 (16Cr-16Mo) are both nickel-chromium-molybdenum alloys with excellent corrosion resistance, but C22 exhibits superior resistance to pitting and crevice corrosion (due to its higher chromium content), while C276 generally performs better in reducing environments and is typically more cost-effective. C22 is more suitable for oxidizing environments and applications requiring superior weldability.
What are the differences between Hastelloy C276 and Monel alloy 400?
The properties of Monel alloy 400 largely depend on the copper content in its composition, while Hastelloy C276 contains molybdenum, chromium, and tungsten, which provide stronger solid-solution strengthening effects, resulting in higher tensile strength.
Hastelloy C22
Hastelloy C22 (UNS N06022) is an advanced nickel-based high-temperature alloy composed of nickel, chromium, molybdenum, and tungsten. It is designed to enhance corrosion resistance, especially in strongly oxidizing and strongly reducing acidic environments.
Hastelloy C276
Hastelloy C276 (UNS N10276) is a versatile nickel-molybdenum-chromium alloy containing tungsten, designed to resist a wide range of corrosive environments. C276 is particularly effective in extreme conditions where problems such as pitting corrosion, stress corrosion cracking (SCC), and crevice corrosion are prevalent. For decades, it has been widely used in various industries exposed to harsh chemical environments.
Chemical Composition: Hastelloy C22 vs C276
| Element | Hastelloy C22 (%) | Hastelloy C276 (%) |
|---|---|---|
| Nickel (Ni) | 55 min | 57 min |
| Chromium (Cr) | 20.0–22.5 | 14.5–16.5 |
| Molybdenum (Mo) | 12.5–14.5 | 15.0–17.0 |
| Tungsten (W) | 2.5–3.5 | 3.0–4.5 |
| Iron (Fe) | 2.0–6.0 | 4.0–7.0 |
| Cobalt (Co) | 2.5 max | 2.5 max |
Corrosion Resistance Comparison of Hastelloy C22 and C276
Corrosion Resistance of Hastelloy C22
Hastelloy C22 exhibits excellent corrosion resistance to a wide range of chemical environments, including both oxidizing and reducing acids. It has superior resistance to oxidizing agents such as nitric acid and ferric ions, making it particularly suitable for environments where such oxidizers are present. Its high chromium content ensures excellent protection against the following types of corrosion:
Aqueous corrosion
Pitting and crevice corrosion
Stress corrosion cracking (SCC)
Corrosion Resistance of Hastelloy C276
Hastelloy C276 has long been a benchmark corrosion-resistant alloy in the industry. Its corrosion resistance in harsh environments, including wet chlorine, hypochlorites, chlorine dioxide, hydrochloric acid, sulfuric acid, and phosphoric acid, is well-established. The molybdenum and tungsten in C276 enhance its resistance to pitting and crevice corrosion. It also performs well in reducing environments where localized corrosion can be a problem, such as:
Sulfuric acid
Hydrochloric acid
Hydrogen chloride gas
High-temperature contaminated media
Mechanical Properties: Hastelloy C22 vs C276
| Property | Hastelloy C22 | Hastelloy C276 |
|---|---|---|
| Tensile Strength (MPa) | 690 | 655 |
| Yield Strength (MPa) | 310 | 283 |
| Elongation (%) | 50 | 40 |
| Density (g/cm³) | 8.69 | 8.89 |
| Melting Point (°C) | 1399–1421 | 1370–1400 |
Applications of Hastelloy C22 and C276
Typical Applications of Hastelloy C22:
Oil and Gas Industry: Equipment exposed to highly corrosive fluids, such as acid gas processing with high concentrations of hydrogen sulfide (H₂S), benefits from C22's excellent corrosion resistance.
Chemical Processing: C22 is resistant to oxidizing environments, making it ideal for reactors, heat exchangers, and piping systems handling mixed acids or chlorine-containing chemicals.
Marine Engineering: Due to its superior resistance to seawater corrosion, Hastelloy C22 is used in desalination systems and offshore platforms.
Aerospace: The combination of corrosion resistance and mechanical strength makes C22 an ideal material for components exposed to harsh atmospheric and chemical environments.
Applications of Hastelloy C22 and C276
Typical Applications of Hastelloy C276:
Chemical Processing Plants: Hastelloy C276 is used in equipment handling reducing acids such as hydrochloric and sulfuric acid.
Pharmaceutical Industry: C276 is widely used by pharmaceutical manufacturers because its high purity and corrosion resistance are crucial for preventing contamination.
Pollution Control: For flue gas desulfurization (FGD) systems, engineers often choose C276 because of its strong resistance to acidic gases and sulfur compounds.
Pulp and Paper Industry: C276 performs well in environments where bleaching agents (such as chlorine dioxide and sulfites) would severely corrode other materials.
Gnee Steel also supplies custom Hastelloy C276 products in various sizes and specifications. Please send us your drawings for a quote!
Gnee Steel is a professional manufacturer of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions according to customer needs. For alloy material price inquiries or to request customized alloy material solutions, please feel free to contact us at ru@gneesteelgroup.com for a quote.