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2. Stainless steel - Wikipedia

   en.wikipedia.org/wiki/Stainless_steel

   Stainless steel, also known as inox, corrosion-resistant steel (CRES), or rustless steel, is an iron-based alloy containing a minimum level of chromium that is resistant to rusting and corrosion. Stainless steel's resistance to corrosion results from the 10.5% or more chromium content, which forms a passive film that can protect the material ...

3. Austenitic stainless steel - Wikipedia

   en.wikipedia.org/wiki/Austenitic_stainless_steel

   Alloy 20 (Carpenter 20) is an austenitic stainless steel possessing excellent resistance to hot sulfuric acid and many other aggressive environments which would readily attack type 316 stainless. This alloy exhibits superior resistance to stress-corrosion cracking in boiling 20–40% sulfuric acid.

4. SAE 304 stainless steel - Wikipedia

   en.wikipedia.org/wiki/SAE_304_stainless_steel

   The subsequent formation of chromium carbide results in reduced corrosion resistance along the grain boundary, leaving the stainless steel susceptible to unanticipated corrosion in an environment where 304 would be expected to be corrosion resistant. This grain boundary corrosive attack is known as intergranular corrosion. [13]

5. 17-4 stainless steel - Wikipedia

   en.wikipedia.org/wiki/17-4_stainless_steel

   The corrosion resistance [1] and machinability [4] of 17-4 are comparable to austenitic 304 stainless steel. 17-4 is magnetic due to its martensitic structure. Overaging (aging beyond the peak strength condition) improves resistance to stress corrosion cracking .

6. SAE steel grades - Wikipedia

   en.wikipedia.org/wiki/SAE_steel_grades

   Type 316—the second most common grade (after 304); for food and surgical stainless steel uses; alloy addition of molybdenum prevents specific forms of corrosion. It is also known as marine grade stainless steel due to its increased resistance to chloride corrosion compared to type 304. 316 is often used for building nuclear reprocessing plants.

7. Alloy 20 - Wikipedia

   en.wikipedia.org/wiki/Alloy_20

   Alloy 20 is an austenitic stainless steel containing less than 50% iron developed for applications involving sulfuric acid.Its corrosion resistance also finds other uses in the chemical, petrochemical, power generation, and plastics industries.