The nickel-based alloy containing nickel, chromium, and molybdenum as the main components, and the presence of cobalt and tungsten for added corrosion resistance, is Hastelloy G30, an alloy which exhibits a better corrosion resistance than others. These components react to corrosive environments such as oxidizing and reducing acids which corrodes materials over time. Therefore, the metals with a high content of molybdenum and chromium demonstrate better resistance to localized corrosion as pitting or crevice corrosion. The Corrosion resistance properties of this material ensures that it is the best to be the sole responsible for process chemical line, control pollution and dispose wastes through various industries. This material has a combination of high strength when tensile force is applied, good processability, and high thermal resistance. The manufacturers provide data sheets, tables, chart and pdf with full specifications of materials, machining characteristics in order to guide and apply.
The strength of Hastelloy Alloy G30 is attributed to its remarkable ability to withstand aggressive environments that usually involve oxidizing acids (e.g. nitric acid and phosphoric acid). Its chemical compounds consist of nickel, chromium, molybdenum which rather add tungsten and copper for anti-corrosion. Aluminum is an alloy composed of aluminum and a medium amount of iron, cobalt and manganese. Hastelloy G30 is a nickel-based superalloy which is widely used in the chemical, pollution control and waste treatment industries. This special factor composition and exclusive properties of this substance allow it to be used in the most crucial applications surrounding corrosive conditions.
Elements | Ni | Cr | Fe | Co | Mo | W | Mn | Cu | Si | P | C | S |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Min (%) | - | 28.0 | 13 | - | 4 | 1.50 | - | 1 | - | - | - | - |
Max (%) | 43 | 31.5 | 17 | 5 | 6 | 4 | 1.50 | 2.40 | 0.8 | 0.40 | 0.030 | 0.020 |
Advantages:
Exceptional Resistance to Oxidizing Media: Maintains integrity even in oxidizing conditions such as nitric acid.
Wide Temperature Range: Capable of enduring temperature pressures on the high and low ends without becoming compromised.
Resistance to Crevice Corrosion: Exhibits excellent crevice corrosion resistance, lowering vulnerability in this area.
Longevity: Available with a long life expectancy, reducing the frequency of service adjustments and replacements.
Disadvantages:
Limited Availability of Forms: Some products like plates or bars may not be readily available.
Higher Cost: Generally costlier than regular grades of steel and other alloy materials.
Machinability: Machining can be complex due to high tensile strength and hardness.
Welding Considerations: Special measures need to be followed to ensure corrosion resistance and mechanical properties remain intact during welding.
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