Cold hardening characteristics of chromium-nickel-manganese-nitrogen austenitic stainless steel 00Cr22Ni13Mn5Mo2N (Nitronic50)

Introduction

Nitronic50 (UNS S20910, XM-19) is a nitrogen-strengthened austenitic stainless steel containing 22.0–24.0% chromium, 13.0–15.0% nickel, 5.0–6.0% manganese, 2.0% molybdenum,and 0.2–0.4% nitrogen. Due to its corrosion resistance, Nitronic50 is widely used in automotive and marine industries, as well as chemical,paper,food and petroleum processing applications.It provides excellent resistance to chloride pitting and crevice corrosion, as well as to stress corrosion cracking. This paper studies the cold hardening characteristics of Nitronic50 and its potential application in power engineering and machine parts.

Characteristic Properties

Nitronic50 is a high strength, Nitrogen-strengthened austenitic stainless steel. It offers excellent resistance to stress corrosion cracking and pitting as well as to chloride-induced stress corrosion and crevice corrosion. The addition of nitrogen improve the pitting resistance of Nitronic50. The reduced ball-point hardness at elevated temperature makes Nitronic50 more resistant to creep. Nitronic50 has a ductile-to-brittle transition temperature of 110°F (43°C), and a maximum stress rupture temperature of 1300°F (705°C).

Cold Hardening Characteristics

Nitronic50 is a cold workable austenitic stainless steel, capable of being cold formed or machined with minimal softening in the area of cold work. Cold working can be used to improve the strength and hardness of the steel. When Nitronic50 is cold worked, it yields a combination of ductility, high strength, and excellent formability. Cold working increases the yield strength and hardens the steel to Rockwell C38-45 with a mean of about 42. The tensile strength can also be increased by cold working as much as 20%. Cold working of this grade can be achieved through a variety of forming operations, such as drawing, forming, spinning and roll forming.

Applications

The combination of high strength, excellent corrosion resistance, and superior formability of Nitronic50 makes it an ideal material for a variety of applications. It is commonly used in the fabrication of containers and parts for the aerospace, automotive and marine industries. Nitronic 50 can also be used to fabricate components for power engineering, oil and gas industry as well as machine parts. Furthermore,it is also used in equipment for the food, paper and chemical industries.

Conclusion

Nitronic50 is a nitrogen-strengthened austenitic stainless steel exhibiting excellent corrosion resistance, excellent formability and superior strength. The addition of nitrogen improves the pitting resistance, while cold working increases the yield strength and hardness of the steel. Nitronic50 is an ideal choice for a variety of applications, particularly automotive, marine, power engineering and machine parts.

Nitronic 50 (00Cr22Ni13Mn5Mo2N) is a nitrogen-strengthened austenitic stainless steel. It is distinguished from other stainless steels by its high strength, good corrosion resistance and superior wear resistance at high temperatures. This makes it an ideal material for a variety of applications in industries such as aerospace, automotive and energy.

To improve the mechanical properties of Nitronic 50, a process of cold-working hardening is used. Cold-working hardening refers to the strengthening of a stainless steel by increasing its stability, strength and hardness through the plastic deformation of its grains at relatively lower temperatures. During the hardening process, the stainless steel is repeatedly cold-worked to expand, elongate, and strengthen the grains. This reduces the grain boundaries and improves the overall strength and hardness of the steel.

The cold-working hardening process increases the yield strength of Nitronic 50 by up to 25%. Additionally, its corrosion resistance, overall strength and hardness also increase significantly. Its tensile strength, torsion strength and impact resistance have also been improved by as much as 40%. Furthermore, the cold-working hardening process also helps to improve the wear resistance of the steel, making it less prone to wear and corrosion over time.

Overall, Nitronic 50 steel is an ideal material for a number of applications due to its improved mechanical properties through the cold-working hardening process. This makes it ideal for use in the aerospace, automotive and energy industries. It is a versatile, durable and reliable steel that can withstand a variety of wear and tear, ensuring a long lifespan.