Hastelloy G30 is a nickel-chromium-molybdenum alloy that has excellent corrosion resistance in a wide range of aggressive media. The alloy was designed to resist localized corrosion such as pitting, crevice corrosion and stress corrosion cracking (SCC). Its chemical composition and mechanical properties make it ideal for use in severe environments where other alloys would fail.
Chemical Composition
The chemical composition of Hastelloy G30 is as follows:
- Nickel (Ni) – 46%
- Chromium (Cr) – 28%
- Molybdenum (Mo) – 22%
- Iron (Fe) – 2.5%
- Cobalt (Co) – 1.5%
- Tungsten (W) – 1%
The high nickel content provides excellent resistance to reducing acids, while the molybdenum and chromium provide resistance to oxidizing acids. The tungsten and cobalt increase the alloy’s overall toughness and strength.
Mechanical Properties
Hastelloy G30 has impressive mechanical properties that make it suitable for use in high-stress applications. The mechanical properties of Hastelloy G30 are summarized below:
- Density: 8.22 g/cm³
- Melting point: 1370 – 1430 °C
- Yield strength: 360 MPa
- Tensile strength: 620 MPa
- Elongation at break: 40%
- Hardness: 200 HB
Application
Hastelloy G30 is used in various industries such as chemical processing, petrochemicals, pharmaceuticals, and pollution control. The alloy is often used in applications where resistance to both reducing and oxidizing acids is required.
- Chemical Processing: Hastelloy G30 is used in chemical processing equipment such as reactor vessels, distillation columns, heat exchangers, and piping systems.
- Petrochemicals: The alloy is used in the production of ethylene, styrene, and other petrochemicals where it provides excellent resistance to a wide range of corrosive environments.
- Pharmaceuticals: Hastelloy G30 is used in pharmaceutical manufacturing equipment such as reaction vessels, piping systems, and filtration equipment.
- Pollution Control: The alloy is used in pollution control applications such as scrubbers and flue gas desulfurization (FGD) systems where it can resist highly corrosive environments.
Process Standard
Hastelloy G30 is manufactured according to various international standards such as ASTM, ASME, DIN, and ISO. These standards ensure that the alloy meets specific requirements for chemical composition, mechanical properties, and dimensional tolerances.
Plate, Round Bar, Pipe, Strip, and Wire Rod
Hastelloy G30 is available in various forms such as plate, round bar, pipe, strip, and wire rod. These forms have different sizes and dimensions to suit various applications.
- Plate: Hastelloy G30 plate is available in thicknesses ranging from 0.1875″ to 1.000″.
- Round Bar: Hastelloy G30 round bar is available in diameters ranging from 0.125″ to 6.000″.
- Pipe: Hastelloy G30 pipe is available in sizes ranging from 0.25″ to 8.000″.
- Strip: Hastelloy G30 strip is available in thicknesses ranging from 0.020″ to 0.125″.
- Wire Rod: Hastelloy G30 wire rod is available in diameters ranging from 0.031″ to 0.750″.
Heat Treatment
Hastelloy G30 can be heat treated to improve its mechanical properties. The most common heat treatment process for Hastelloy G30 is annealing. Annealing involves heating the alloy to a specific temperature and holding it at that temperature for a specified time. This process helps to relieve stress within the alloy, improve its ductility, and reduce the risk of cracking during fabrication.
Conclusion
In conclusion, Hastelloy G30 is an excellent alloy for use in aggressive environments where other alloys would fail. Its chemical composition and mechanical properties make it ideal for applications in the chemical processing, petrochemicals, pharmaceuticals, and pollution control industries. Hastelloy G30 is available in various forms such as plate, round bar, pipe, strip, and wire rod, and can be heat treated to improve its mechanical properties. ANTON METAL can provide you with high-quality Hastelloy G30 products that meet international standards such as ASTM, ASME, DIN, and ISO.
Post time: Apr-22-2023
