Chemical Composition of Precipitation Hardened Stainless Steel S51778 0Cr17Ni7Al
Precipitation hardened stainless steel S51778 0Cr17Ni7Al is a relatively new steel that is gaining in popularity, especially for parts that require resistance to corrosion and wear. This specific grade has high mechanical properties due to the addition of nickel, and is one of the most corrosion-resistant steels available. The addition of Aluminum increases its heat treatability. However, this steel also poses a certain degree of challenging due to its complex chemical composition.
It is important to understand the chemical composition of this steel to get the best results during the manufacturing process. The following table presents the chemical composition of this steel.
Element Content (%)
Carbon (C) 0.04-0.06
Manganese (Mn) 0.30-0.60
Silicon (Si) 0.20-0.50
Phosphorus (P) 0.025 max
Sulphur (S) 0.015 max
Nickel (Ni) 7.5 to 8.5
Chromium (Cr) 17.0-19.0
Molybdenum (Mo) 0.50-1.00
Aluminum (Al) 0.50-1.00
Iron (Fe) remainder
This particular steel is a corrosion-resistant austenitic stainless steel with a high-temperature strength. The addition of nickel and aluminum increases the heats treatments required for fabricating and it provides an excellent choice for components that require a higher level of strength.
In terms of its overall properties, this steel is capable of resisting corrosion even in a highly corrosive environment. It also possesses superior wear resistance and it is highly resistant to mechanical stress due to its high strength. Additionally, it has excellent ductility and weldability, both in terms of hot and cold treatments.
It also possesses superior salt water and alkali corrosion resistance, and it is very resistant to scaling and high temperatures. In addition, it has an enhanced resistance to fatigue at elevated temperatures.
The overall result is a relatively low-cost option for high-quality parts, particularly for parts that are required to be mechanically strong. The superior corrosion resistance and wear resistance of this steel makes it ideal for use in components such as bearing components, pumps, valve bodies, equipment housing and motor casings, among other applications.
In conclusion, the chemical composition of precipitation hardened stainless steel S51778 0Cr17Ni7Al is a complex one that needs to be understood appropriately. This steel is particularly attractive due to its corrosion resistance, wear resistance, strength and also weldability and ductility. While the cost can be higher due to its complex composition, it is a good option when fabricating high-quality components that require exceptional mechanical strength and corrosion resistance.
