What are the differences between Hastelloy G30 and C276?
What are the differences between Hastelloy G30 and C276?
Both Hastelloy G30 and C276 are nickel-based alloys, but G30, due to its higher chromium content (approximately 30%) and copper content, exhibits superior corrosion resistance in oxidizing, sulfuric, and phosphoric acid environments, making it ideal for acid processing. C276, on the other hand, with its higher molybdenum content (approximately 15-17%) and tungsten content (approximately 3-4.5%), performs exceptionally well in reducing environments, chlorine-rich media, and seawater, exhibiting better resistance to pitting and crevice corrosion, making it a benchmark material for harsh chemical processing environments. The main difference between the two lies in their elemental balance: G30's oxidation resistance primarily relies on chromium, while C276 relies on molybdenum and tungsten to enhance its corrosion resistance in reducing/chlorinated environments.
What is the maximum operating temperature of Hastelloy C276?
Hastelloy C-276 is a nickel-molybdenum-chromium alloy with excellent corrosion resistance. This alloy is resistant to pitting corrosion, crevice corrosion, and stress corrosion cracking. Hastelloy C-276 can only be hardened through cold working. Its operating temperature range is from low temperatures to 750°F (400°C).
What is Hastelloy G30?
Hastelloy G30 is renowned for its exceptional corrosion resistance in phosphoric acid environments. Composed of nickel, chromium, and molybdenum, it is primarily used in the chemical processing and petrochemical industries. G30 alloy exhibits extremely strong resistance to pitting, crevice corrosion, and stress corrosion cracking. It also demonstrates excellent corrosion resistance in chloride environments. Hastelloy G30 is commonly used in environments containing sulfuric acid, hydrochloric acid, and hydrofluoric acid, making it ideal for pharmaceuticals, pulp and paper manufacturing, and flue gas desulfurization.
What is Hastelloy C276?
Hastelloy C276 is a commonly used alloy widely applied in the chemical processing and oil and gas industries. Composed of nickel, molybdenum, and chromium, it possesses excellent resistance to oxidation, reduction, alkalis, and chlorides. C276 alloy has been used in wet chlorine environments and exhibits excellent resistance to stress corrosion cracking and localized corrosion. It is also suitable for components subjected to high mechanical stress and high-temperature environments, such as industrial processes containing large amounts of sulfur dioxide.
Chemical Composition of Hastelloy G30 vs Hastelloy C-276
| Element | Hastelloy G30 (UNS N06030) Content (%) | Hastelloy C-276 (UNS N10276) Content (%) |
|---|---|---|
| Nickel (Ni) | 50 | 57 |
| Chromium (Cr) | 29 | 16 |
| Iron (Fe) | 14 | 5 |
| Cobalt (Co) | 5.8 | 2.5 |
| Molybdenum (Mo) | 2.5 | 16 |
| Copper (Cu) | 2.5 | trace |
| Tungsten (W) | 1.5 | 3.5 |
| Manganese (Mn) | trace | 0.5 |
Mechanical Properties of Hastelloy G30 vs Hastelloy C-276
| Property | Hastelloy G30 (UNS N06030 / Werkstoff 2.4603) | Hastelloy C-276 (UNS N10276 / Werkstoff 2.4819) |
|---|---|---|
| Tensile Strength | 750 MPa (109 ksi) | 760 MPa (110 ksi) |
| Yield Strength | 305 MPa (44 ksi) | 355 MPa (52 ksi) |
| Elongation | 50% | 40% |
| Hardness (Rockwell B) | 89 HRB | 100 HRB |
Key Characteristics and Applications: Hastelloy G30 vs Hastelloy C-276
| Aspect | Hastelloy G30 (Nickel Alloy G30) | Hastelloy C-276 (Nickel Alloy C-276) |
|---|---|---|
| Corrosion Resistance | Outstanding resistance to oxidizing acids, especially nitric acid and mixed acid environments containing phosphoric acid, hydrochloric acid, and fluorides. | Exceptional resistance to a wide range of corrosive environments, including oxidizing and reducing acids, chlorine-containing media, seawater, and brine solutions. |
| Localized Corrosion | Excellent resistance to pitting and crevice corrosion. | High resistance to stress corrosion cracking and pitting. |
| High-Temperature Performance | Can be used in high-temperature environments up to 1800°F. | Can be used in high-temperature environments up to 1900°F. |
| Primary Applications | Widely used in chemical processing industries, especially in nitric acid production, pickling operations, and scrubbers. | Versatile alloy used in various industries such as chemical processing, pollution control, pulp and paper production, and waste treatment. |
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.