Product bulletin high alloy stainless steels september. High alloy stainless steels d102757x012 product bulletin 59. Cn3mn j94651 super austenitic stainless steel chemical composition, mechanical properties, and specifications. Super austenitic stainless steel tubes super austenitic. Superaustenitic stainless steel alloys are characterized by their high nickel and molybdenum contents plus nitrogen. While low carbon prevents sensitization, stabilized grades may still be preferred for special applica. However, with world demand growing, prices of these materials have increased dramatically, and lead times can exceed more than one year. These steels approach the performance of highly corrosion resistant nickel based alloys at a significant lower cost. The most common of the alloys are 904l, al6xn, 254 smo, 256mo and 1925 hmo. They have higher yield strength, 65 ksi 450 n mm2, and higher tensile strength, 100 ksi 69 n mm2, compared to 300 series stainless steels. Properties of stainless super austenitic pm material made. This paper presents tool wear study when a machinability test was applied using milling on super austenitic stainless steel al6xn alloy. Superaustenitic steels are amagnetic and present a good weldability and excellent formability.
It has a high pren pitting resistance equivalency number for superior. With low nickel content and reasonable molybdenum content, super ferritic stainless steels are now proving to be the most cost effective. Franck demulder, dcn engineering cherbourg figure 1. Todays super austenitic prices are more than twice the value of late 2003. Superferritic stainless steels the cost effective answer. Welding of duplex and super duplex stainless steels duplex and super duplex stainless steels were developed to combine the best properties of austenitic and ferritic steels. With its high level of chromium, super duplex steel provides outstanding resistance to acids, acid chlorides, caustic solutions and other environments in the chemicalpetrochemical, pulp and paper industries, often replacing 300 series stainless steel, high nickel super austenitic steels and nickelbased alloys. The concept of super austenitic stainless steel comes with super ferritic stainless steel and super duplex stainless steel. The austenite stainless steel alloy has been developed further to be super austenitic stainless steel sass by increasing the percentage of the alloying elements to form the half or more than the. A typical example is a super austenitic stainless steel containing 6% molybdenum and 7% molybdenum. Its corrosion resistance is higher than the duplex grades because its alloy content is higher. Eight milling trials were performed under two cutting.
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