00Cr25Ni7Mo4N cold and hot workability

Introduction

S25-7Mo belongs to a family of super austenitic stainless steels that possess various excellent properties. These stainless steels are characterized by a high molybdenum content and low carbon content, giving them high oxidation resistance, high strength and good corrosion resistance. Specifically, S25-7Mo (UNS S32550) is a nitrogen-containing duplex stainless steel that contains about 25% chromium, 7% molybdenum, and 4% nitrogen. This combination of elements provides the alloy with remarkable properties such as superior corrosion resistance, good weldability and formability, plus excellent strength and toughness. Here well take a look at the cold and hot working properties of S25-7Mo.

Cold Working Properties

The cold working properties of S25-7Mo are excellent, as the alloy exhibits good ductility and formability when cold worked. The alloy is resistant to cold cracking, and it is typically solution annealed at a temperature between 1010 - 1150°C (1850 - 2100°F). After cold working, the alloy should be recrystallized and/or tempered to restore the desired mechanical properties.

Hot Working Properties

S25-7Mo hot works very well in the 1040 - 1150°C (1900 - 2100°F). The alloy shows good hotformability and chemical homogeneity, and it flows readily to fill in dies and forms with minimal distortion. The alloy should be annealed Austenitically after hot working to restore the desired mechanical properties.

Welding Properties

S25-7Mo exhibits good weldability, with most weld processes such as SMAW, GTAW and GMAW being suitable for welding the alloy. It is not recommended to weld the alloy in the as-welded condition as recovery and tempering should be done to restore the acquired mechanical properties.

Conclusion

S25-7Mo is a nitrogen-containing, duplex stainless steel that possesses superior corrosion resistance, good weldability and formability, plus excellent strength and toughness. The alloy is excellent for both cold and hot working operations with good ductility, formability, and resistance to cold cracking. It is also weldable and can be annealed Austenitically after welding to restore the desired mechanical properties.

《00Cr25Ni7Mo4N Cold and Hot Working Performance》

00Cr25Ni7Mo4N stainless steel is a kind of high nickel austenitic stainless steel. It can be used for components requiring excellent corrosion resistance and good strength. The alloy also has superior mechanical properties and is well suited for welding.

00Cr25Ni7Mo4N stainless steel has excellent cold and hot working properties. The alloy can be readily formed and fabricated through cold working processes such as bending, rolling, spinning and deep drawing. Thin sheets and strips can be produced using roll forming. It is easier to deform than other austenitic stainless steels and can exhibit excellent formability in the annealed condition.

The alloy exhibits good ductility and can be readily welded by most standard fusion and resistance techniques. This alloy is highly resistant to intergranular corrosion and can be used successfully for welding without the need for pre- or post-weld heat treatment. Hot working of 00Cr25Ni7Mo4N stainless steel can when appropriate be done using forging, hot rolling and extrusion processes. When heated, it quickly exhibits a strong tendency to work harden, but also shows good forgeability. When hot working the alloy, it is recommended to anneal it after during and after hot working to restore ductility.

In conclusion, 00Cr25Ni7Mo4N stainless steel has excellent cold and hot working properties. It is easily formed and welded and is highly resistant to corrosion. It also has good formability and forgeability and can easily be annealed to restore ductility. This makes it suitable for a wide range of applications in a variety of industries.