High chromium ferritic stainless steel with high purity Cr29Mo4Ni2 (UNSS44800) chemical composition

High Chromium Ferritic Stainless Steel High purity Cr29Mo4Ni2 (UNSS44800) Chemical Composition High chromium ferritic stainless steel UNSS44800 is a high purity chromium-rich ferritic stainless steel, containing 29-30% chromium, 4-5% molybdenum, 2-3% nickel and 0.1-0.2% nitrogen. It has excellent corrosion resistance to acids, chlorides and other halides, good oxidation and sulphidation resistance and high stress corrosion cracking resistance in combination with a good general corrosion resistance. This grade has good mechanical properties and wear resistance, but welded joints can be subject to cracking. It is used in paper and pulp industry, environmental engineering and chemical processing applications. The high chromium ferritic stainless steel UNSS44800 has a high resistance to corrosion in aqueous environments. It provides excellent corrosion resistance to all forms of acidic media, including concentrated sulfuric and hydrochloric acids, as well as dilute phosphoric acid, acetic acid and citric acid. It also demonstrates good corrosion resistance in the presence of chlorides. Its high chromium content renders the steel resistant to oxidizing, reducing and mixed environments. The steel exhibits a high degree of resistance to sulfidation, showing good pitting resistance, crevice corrosion and stress corrosion cracking resistance. It also has good resistance to weathering, oxidation, erosion and flame attack. UNSS44800 is a ferritic stainless steel that shows good mechanical properties, including hardness and toughness. It can be cold worked and hot worked, with a minimum yield strength of about 45 ksi, an ultimate tensile strength of about 80 ksi and elongation of about 20%. Its yield strength is somewhat lower than that of austenitic grades but it has a higher tensile strength than martensitic grades. UNSS44800 has good resistance to wear, including abrasion, tear and shear. It also displays good hardness and has a tendency to sharpen during use, and can be used for applications such as food processing, medical and dental instruments and razor blades. While UNSS44800 has excellent corrosion resistance and mechanical properties, it is not resistant to high temperatures and is limited to use at relatively low temperatures of about 350°C. Welding of the steel can be challenging and can lead to cracking, and standards must be followed when welding to prevent premature failure due to cracking or embrittlement of the welded joint. The steel should be post weld heat treated or a filler material selected with carefully matching properties. In conclusion, high chromium ferritic stainless steel UNSS44800 is a high purity chromium-rich ferritic stainless steel, containing 29-30% chromium, 4-5% molybdenum, 2-3% nickel and 0.1-0.2% nitrogen. It has excellent corrosion resistance to acids, chlorides and other halides, good oxidation and sulphidation resistance and high stress corrosion cracking resistance in combination with a good general corrosion resistance. It also has good mechanical properties, with a minimum yield strength of about 45 ksi, an ultimate tensile strength of about 80 ksi and elongation of about 20%. It is used in paper and pulp industry, environmental engineering and chemical processing applications, as well as food processing, medical and dental instruments and razor blades. It can be welded, albeit with caution, and must be post weld heat treated or a filler material selected with carefully matching properties.

UNS S44800 is a grade of stainless steel and it is popularly known as Ferritic Stainless Steel or High Chrome Iron. It is made of chromium, molybdenum, nickel and nitrogen alloy and is known for its excellent oxidation and corrosion resistance. It has a higher chromium content than standard ferritic stainless steels, making it more resistant to corrosion and oxidation. This makes it suitable for applications where it is exposed to higher temperatures, such as furnaces and other industrial equipment.

Its high chromium content gives UNS S44800 enhanced resistance to acid corrosion and pitting, making it suitable for applications where it is exposed to harsh chemicals. In addition, it also has great formability and strength. This makes it an excellent choice for many applications, including medical equipment, transportation products and manufacturing components.

Additionally, UNS S44800 has excellent heat resistance, making it an ideal choice for applications that require preparing meals in high temperatures. It is also extremely resistant to fatigue and wear, making it suitable for food-grade applications. It is also often used to make components for aerospace and military use.

Overall, UNS S44800 is an incredibly strong and durable alloy, which is resistant to heat, corrosion, and wear. Its high chromium content makes it much more resistant to corrosion and oxidation than standard ferritic stainless steels, while still providing excellent formability and strength. It is often used in applications where it is exposed to harsh chemicals, such as medical equipment, transportation products and manufacturing components.