Characteristics, Distinctive Advantages Wide Ranging Applications of Chrome- Manganese Stainless Steels

摘要

Developed over last six decades, Chrome-Manganese stainless steels now comprise a whole family of lustrous products in a variety of compositions and properties to facilitate optimal selection of most appropriate grades for a large number of applications .This paper describes properties of some of these steels and how they compare with Chrome-Nickel austenitic stainless steels. Due to their attributes, these stainless steels constitute the fastest growing family of stainless steels in the globe. Some of the applications where these grades have been successfully used are covered. Their advantage in terms of cost effectiveness and material saving is outlined. The paper illustrates that Cr-Mn stainless steels exhibit attractive combination of strength, ductility, toughness, formability, weldability, wear & corrosion resistance. Yield strength of general purpose Cr-Mn grades is 30-40% higher than 300 & 400 series counterparts. Ductility is comparable to 300 series and much higher than 400 series grades .It is possible to have Cr-Mn alloys with much higher room temperature and elevated temperature strength as compared to 400 & 300 series. These alloys with appropriate selection match 300 series in drawability and stretch formability. Resistance to wear, galling, erosion and abrasion of Cr-Mn stainless steels is generally superior as compared to 300 & 400 series.