The composition of 254SMO is as shown in the figure:
The mechanical properties of 254SMO are: tensile strength ≥650 MPa, yield strength ≥300 MPa, elongation ≥ 35% and area shrinkage ≥ 50%.
Common 6Mo stainless steels include AL-6XN, 654SMO, 1925hMo and 25-6Mo. The composition of 254SMO is very similar to that of AL-6XN and is often compared. The remarkable difference between them is that the nickel content is different, and the 254SMO is about 6% lower. Among 6Mo stainless steels, 254SMO is the most cost-effective, but its poor processability limits its application.
Extended data:
The composition of super stainless steel is characterized by high chromium and high nickel (or high molybdenum). Generally, the content of Cr or Ni is 18~26%, the content of Mo is 4~8%, and the equivalent PREN of pitting corrosion is more than 40 (even more than 42). This super stainless steel with PRE equivalent greater than 42 is also called 6Mo stainless steel.
Super stainless steel is a kind of stainless steel between ordinary stainless steel and nickel-based alloy, which is specially invented to cope with the harsh corrosive conditions that ordinary austenitic stainless steel is not qualified for (such as high concentration chloride ion medium or seawater).
References:
Baidu encyclopedia -254SMO