Super austenitic 254SMO stainless steel plate
254SMO is an austenitic stainless steel. Because of its high molybdenum content, it has high resistance to spot corrosion and crevice corrosion. This brand of stainless steel is developed and developed for use in environments containing halides such as seawater. 254SMO also has good uniform corrosio
PRODUCT INTRODUCTION
254SMO is an austenitic stainless steel. Because of its high molybdenum content, it has high resistance to spot corrosion and crevice corrosion. This brand of stainless steel is developed and developed for use in environments containing halides such as seawater. 254SMO also has good uniform corrosion resistance. Especially in the acid containing halide, the steel is better than ordinary stainless steel. Its C content is less than 0.03%, so it is called pure austenitic stainless steel (< 0.01% is also called super austenitic stainless steel).
Super stainless steel is a kind of special stainless steel. Firstly, it is different from ordinary stainless steel in chemical composition. It refers to a kind of high alloy stainless steel with high nickel, high chromium and high molybdenum. The famous one is 254SMO containing 6% mo. this kind of steel has very good local corrosion resistance. Under the conditions of seawater, aeration, cracks and low-speed scouring, it has good pitting corrosion resistance (PI ≥ 40) and good stress corrosion resistance. It is a substitute material for Ni based alloy and titanium alloy. Secondly, in terms of high temperature resistance or corrosion resistance, it has better high temperature resistance or corrosion resistance, which is irreplaceable by 304 stainless steel. In addition, from the classification of stainless steel, the metallographic structure of special stainless steel is a stable austenitic metallographic structure.
Main Component：
| C | Mn | Ni | Si | P | S | Cr | Cu | Mo |
| ≤0.02 | ≤1.00 | 17.5～18.5 | ≤0.8 | ≤0.03 | ≤0.01 | 19.5～20.5 | 0.5～1.0 | 6.0～6.5 |
All Countries Standard：UNS S31254、DIN/EN 1.4547、ASTM A280、ASME SA-280
Chemical composition:
| C | Mn | P | S | Si | Cr | Ni | Mo | N | Ce |
| 0.05-0.10 | ≤0.80 | ≤0.040 | ≤0.030 | 1.40-2.00 | 20.00-22.00 | 10.00-12.00 | -- | 0.14-0.20 | 0.03-0.08 |
Because this special stainless steel is a high alloy material, the manufacturing process is quite complex. Generally, people can only rely on traditional processes to manufacture this special stainless steel, such as pouring, forging, calendering and so on.