0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 Martensitic Stainless Steels: Process and Performance
Stainless steel is now a key material for many engineering applications due to its strength, durability and formability. Depending on its composition, stainless steel can achieve different properties, including higher resistance to corrosion and heat. Martensitic stainless steel is one of the main types of stainless steel, which is composed of chromium, nickel, molybdenum and is highly alloyed. The two variants of the 18Cr-12Ni-3Mo martensitic steel family, 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 with a carbon content of ≤0.04%, are particularly important due to their good balance of mechanical, strength and corrosion performance. This article reviews the processing of 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 martensitic stainless steels, as well as their properties.
Processing of 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 Martensitic Stainless Steels
Due to their high alloy content, the processing of 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 martensitic stainless steels requires special attention. Appropriate pre-heating processes have to be applied in order to avoid any thermal stresses and cracking during the forming operations. Even though most of the machining operations are similar to those applied on low alloy steels (e.g., cutting, shearing and drilling), some precautions should be taken, as these alloys exhibit a relatively high hardness and a higher rate of tool wear. During grinding operations it is essential to use a coolant to optimize the process and increase the life of the cutting tools.
Properties of 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 Martensitic Stainless Steels
The 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 martensitic stainless steels have a slightly higher corrosion resistance compared to the other steel variants in the 18Cr-12Ni-3Mo family. This allows these materials to be applied in aggressive atmosphere. However, due to their low carbon content and the subsequent low hardness of the surfaces, their wear resistance is slightly lower than other martensitic stainless steels.
These alloys offer a high level of strength and a good ductility, making them suitable for deep drawing and bending in thin gauge parts. The mechanical properties of the 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 martensitic stainless steels are presented in Table 1.
Table 1. Mechanical properties of 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 martensitic stainless steels
Material Tonnage Tensile Strength (MPa) Yield Point (MPa) Elongation (%) 0Cr19Ni13Mo3 550-750 540-700 25-40 00Cr19Ni13Mo3 550-750 540-700 25-40
The 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 martensitic stainless steels also show good creep resistance and good weldability, which makes them suitable for many applications in a range of industries.
Conclusion
Although being more difficult to process than other stainless steels, the 0Cr19Ni13Mo3 and 00Cr19Ni13Mo3 martensitic stainless steels offer an attractive combination of corrosion resistance and higher mechanical strength than traditional martensitic stainless steels. These alloys are therefore suitable for several applications, such as deep drawing and press-working, chemical and petrochemical equipment and component production in the automotive and aerospace industries.
