Letter 37094

Material selection SS304 vs SS316 [Canada] 

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We are manufacturing packaging equipment and just sold a project to China, we would like to select the best Stainless Steel and wonder if we must used the SS316, we are trying to find a selection guide, the only information we have tell us that the SS316 would not perform better.
Humidity 95-98%
Tropical environment
Temperature can drop from 40 to 0 celcius during night
There is condensation on equipment and accumulation of corrosive dust on it.
Products: 1 line-Salt NaCl, 2 line Amonium Chloride Nh4Cl, 3 line light and heavy Soda Ash Na2COl

Patrick Couturier, Eng Jr.
- Canada

Neither 304 not 316 stainless will stand up to a chloride environment. Perhaps you should investigate duplex or super-duplex stainless steels (2205 or 2507) for these service conditions.

Bill Reynolds
- Melbourne, Victoria, Australia

T316 will perform better than T304 in chloride, however neither may be entirely satisfactory. I'd suggest you look into duplex satinless alloys for this application.

Jeffrey Holmes, CEF - Spartanburg, SC, USA

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