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日本三菱钢公司生产了一种新型超级不锈钢“MORS”。该钢是在Fe-Ni-Cr奥氏体不锈钢中增加铝含量,从而使钢具有很优越的耐高温氧化性、耐蚀性、时效硬化性以及加工性等。该不锈钢的主要合金元素含量范围为:Ni 10～45％,Cr 4～25％、Al 3.5～5.5％,Y 0.1～5％、Mn 0～20％、C 0～0.5％,N 0～0.5％,Cu 0～1％。因该钢在高温加热时,表面形成氧化铝膜,故耐氧化性优越。并且,因含镍和铝而具有析出强化效果。
Mitsubishi Electric Corporation of Japan produced a new type of super stainless steel “MORS.” The steel is in the Fe-Ni-Cr austenitic stainless steel to increase the aluminum content, so that the steel has a very high temperature oxidation resistance, corrosion resistance, age hardening and processability. The main alloying element content of the stainless steel ranges from 10 to 45% of Ni, 4 to 25% of Cr, 3.5 to 5.5% of Al, 0.1 to 5% of Y, 0 to 20% of Mn, 0 to 0.5% of C, %, Cu 0 ~ 1%. Because the steel is heated at high temperature, the surface of the formation of aluminum oxide film, oxidation resistance is superior. In addition, it has a precipitation strengthening effect due to nickel and aluminum.