Where in engineering is stainless steel needed, and what are the operating conditions?

Could you be more specific? Stainless steel is generally used in areas subject to corrosion. For a specific medium, different grades of stainless steel must be selected.

Thank you for the reply from above. I’m not too familiar with the specifics of the media involved. I just want to get a general idea of how to choose materials when corrosive media are present; a brief explanation will be sufficient. Thank you

It’s a bit too general. In places where ordinary carbon steel would rust easily, stainless steel can be considered as an alternative. Over the years, however, due to considerations related to the service life of the materials and their reuse, stainless steel has also been used in place of carbon steel – this is more common abroad, for example in structural steel used in buildings. Another factor to consider when using stainless steel is decorative materials; after surface treatment, stainless steel can achieve a variety of excellent decorative effects.

Your question is too broad; could you be more specific? The mechanism by which stainless steel resists rust is that the alloying elements form a dense oxide film that prevents oxygen from coming into contact, thus stopping further oxidation. So stainless steel is not “rust-proof”. A high-alloy steel that can resist corrosion in air or chemical corrosive environments. Stainless steel features an attractive surface and excellent corrosion resistance; it does not require any surface treatment such as plating, allowing it to exhibit its inherent surface properties. It is a type of steel used in various applications, and is commonly referred to as stainless steel. High-alloy steels such as 13 chromium steel and 18-8 chromium-nickel steel represent high performance. Even the most common 304 (1Cr18Ni9) can rust: 1. Chloride ions are present in the environment in which it is used. Chloride ions are widely present, such as in table salt, sweat, seawater, sea breeze, soil, and so on. Stainless steel corrodes rapidly in environments containing chloride ions, even faster than ordinary low-carbon steel. Therefore, there are requirements regarding the environment in which stainless steel is used, and it needs to be wiped regularly to remove dust and kept clean and dry. 2. It has not undergone solution treatment. The alloying elements did not dissolve into the matrix, resulting in a low alloy content in the matrix structure and poor corrosion resistance. 3. This titanium- and niobium-free material has a natural tendency to intergranular corrosion. Adding titanium and niobium, along with stabilization treatment, can reduce intergranular corrosion.

Stainless steel is used in engineering for the following reasons: 1. The medium or environment causes severe corrosion of ordinary carbon steel, so it is necessary to use a material with higher corrosion resistance； 2. When the temperature of the medium or environment is high, ordinary carbon steel does not have sufficient strength at such temperatures; it is necessary to use materials with better heat resistance ；

Stainless steel should be used in areas where corrosion is severe. It should also be considered as an option when the strength of carbon steel is not sufficient. Stainless steel corrodes rapidly in the presence of chloride ions, so care must be taken when using it