Here are five of the main grades and their advantages:

           Stainless steel: Stainless steel is a popular material for nuts and bolts in Fertilizer Plants because of its corrosion resistance. It can withstand harsh chemical environments and high temperatures, making it ideal for use in corrosive or acidic environments. Stainless steel also has good mechanical properties, making it strong and durable.

             Titanium: Titanium is another corrosion-resistant material that is used in Fertilizer Plants. It is highly resistant to a wide range of corrosive chemicals, including acids, alkalis, and chlorides. Titanium is also very lightweight, making it an ideal material for applications where weight is a concern.

              Inconel: Inconel is a high-strength, corrosion-resistant alloy that is commonly used in Fertilizer Plants. It is highly resistant to oxidation, corrosion, and high temperatures, making it ideal for use in high-temperature environments.

                 Hastelloy: Hastelloy is another high-performance alloy that is commonly used in Fertilizer Plants. It is highly resistant to a wide range of corrosive chemicals, including acids, alkalis, and chlorides. Hastelloy is also highly resistant to stress corrosion cracking, making it an ideal material for use in high-stress environments.

                  Monel: Monel is a nickel-copper alloy that is highly resistant to corrosion, especially in acidic environments. It is also highly resistant to high temperatures, making it an ideal material for use in Fertilizer Plants.

          In summary, the main grades of materials used to manufacture nuts and bolts in Fertilizer Plants are stainless steel, titanium,         Inconel, Hastelloy, and Monel. These materials offer various advantages, including corrosion resistance, high strength, and resistance to high temperatures, making them ideal for use in harsh chemical environments.