Metal Chemical Storage Tanks

These stainless steel storage tank types are popular for their affordability and corrosion resistance in most applications. 304 usually consists of 18-20% chromium and 8-12% nickel. The composition of 304L is similar, but with a lower carbon content to prevent sensitization. Lowering the chromium carbide content improves corrosion resistance for high-heat applications.

Stainless steel 316 has a higher resistance to corrosion than 304 because of its 2-3% molybdenum content, lending it to common uses in chemical and marine storage applications. At 10-14% nickel, the nickel counteracts molybdenum's ferritic-forming characteristic. The low carbon version of grade 316, 316L, safeguards against sensitization in high-temperature environments like 304L.

Duplex stainless steel combines the benefits of austenitic and ferritic materials, maintaining corrosion resistance as an austenitic metal but also adding mechanical strength, a ferritic characteristic. At 20-28% chromium, 5-8% nickel, and 2-5% molybdenum, this metal alloy is highly resistant to stress corrosion cracking. Also, duplex stainless steel is typically less expensive given the lower percentage of nickel in its makeup, and the option of using thinner sheets without sacrificing strength.