To understand the differences between 304 Grade and 316 Grade stainless steel applications
Pfannenberg offers a 304 stainless steel version on all DTS 3000 series. This unit is made to be resistant to corrosion and is certified up to NEMA Type 4/4X.
Pfannenberg offers a 316 stainless steel option instead of the standard 304 stainless steel.
Recommended Applications
- 304 is recommended for standard wash-down and outdoor applications.
- 316 is recommended on applications that will be exposed to strong bases and acids such as pharmaceuticals and laboratories, and a higher quantity of chloride such as in a coastal/marine environment.
Both are durable and provide excellent resistance to corrosion and rust. 304 is the most versatile and widely used austenitic stainless steel in the world, due to its corrosion resistance
Composition and Corrosion Protection
- 304 contains 18% chromium and 8% nickel
- 316 contains 16% chromium, 10% nickel and 2% molybdenum
Molybdenum primarily increases the corrosion resistance of stainless steels against pitting agents, such as strong bases and acids, and chloride. As well as increasing its resistance to stress corrosion at temperatures above 60°C.
- 304 considered resistant to pitting corrosion in potable water with up to 200mg/L chlorides
- 316 considered resistant to pitting corrosion in potable water with up to 1,000mg/L chlorides
Strength
Both 304 and 316 grade stainless steel have the same Typical Mechanical Properties required for annealed material covered by ASTM-A240 standard.
Yield Strength .2% offset = 30,000 Psi
Tensile Strength = 80,000 Psi
Elongation = 50%