Stainless Steel at Carbon Steel Pricing
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Stainless Steel Bag Filter Housing
IMPROVED R.O.I WITH STAINLESS STEEL
Stainless steel offers superior corrosion-resistance and strength over carbon steel. With the addition of chromium (10.5 to 11 percent by mass), the steel forms a chromium oxide layer to greatly reduce corrosion. The ability to reduce corrosion extends the service life of the filters and increases your return on investment.
A plastics company in the Midwest needed to improve cooling water quality for its operation. The decision was made to install bag filters because of the ease of operation and filtering flexibility. At the time of purchase, the price of the carbon steel filters were lower than the stainless steel filters. After just three to four years of service, the filters began to leak at the lid and developed numerous leaks on the body of the filter. The increased maintenance time to change filters on the corroded unit, and repairs needed to continually fight leaks at the lid closure, ultimately lead to the replacement of the carbon steel filters with our stainless units.
What’s the Difference Between Grade 316 and Grade 304 Stainless?
The most basic difference between grade 304 and grade 316 stainless steels is that 316 tends to have more nickel and a bit of molybdenum in the mix. The general mechanical properties of the two metals are mostly comparable.
The increased nickel content and the inclusion of molybdenum allows for grade 316 stainless steel to have better chemical resistance than 304 stainless steel. It’s ability to resist acids and chlorides, including salt, makes grade 316 ideal for chemical processing, marine applications & saltwater disposal wells.
However, the addition of nickel and molybdenum also makes grade 316 a more expensive alloy than stainless steel 304 per ounce of material.
Additionally, the melting point of grade 304 stainless steel is a bit higher than that of grade 316. The melting range of 316 is 2,500 °F – 2,550 °F (1,371 °C – 1,399 °C), roughly 50 to 100 degrees Fahrenheit lower than the melting point of grade 304 stainless steel.
Though the stainless steel 304 alloy has a higher melting point, grade 316 has a better resistance to chemicals and chlorides (like salt) than grade 304 stainless steel. When it comes to applications with chlorinated solutions or exposure to salt, grade 316 stainless steel is considered superior.
Three Benefits of Using 316 Stainless Steel
Corrosion Resistant Properties
Due to the addition of molybdenum, grade 316 stainless steel is more corrosion resistant than similar alloys, such as 304 stainless steel. This reduces pitting from chemical environments and allows grade 316 stainless steel to be used in highly acidic and caustic environments that would otherwise eat away at the metal. For instance, grade 316 stainless steel can withstand caustic solutions and corrosive applications such as salt water disposal well filtration or any other corrosive chemistry processes.
These properties also make grade 316 stainless steel ideal for pharmaceutical and medical applications. Since sterilization processes in these industries combine both strong disinfectants and or with high temperatures to prevent contamination, a resistant alloy such as grade 316 is ideal.
Seawater and salt air can be especially damaging to metals. Besides the rough environment of the sea and marine applications, chlorides, such as salt, can eat away at even the toughest metals. Salt will even compromise the protective oxide layer of grade 304 stainless steel, resulting in rust. For marine applications, or processes involving chlorides, grade 316 stainless steel is ideal.
Grade 316 has especially better resistance to salt and chloride pitting. Pitting corrosion can occur when stainless steel alloys, such as grade 304 stainless steel, come into contact with salt-rich sea breezes and seawater. Chloride resistant metals, like grade 316 stainless steel, are essential to use for naval applications or anything involved with high chlorides.
Grade 316 stainless steel is both tough and versatile, which makes it ideal for bag filter housings built to last for years of use under an extremely corrosive environment.
Is It Worth the Extra Cost?
If you have an application with very powerful corrosives or relies on chlorides, then paying a premium for grade 316 stainless steel is definitely worth it. In such applications, 316 stainless will last many times longer than grade 304 stainless steel would—which can mean many extra years of useful life and improved ROI.
However, for applications using milder acids or where salt exposure isn’t a concern, 304 stainless steel alloy can work just as well.
Just be sure you’ve accounted for all processes and environmental factors when choosing a filter bag housing.
Overall, 316 can be worth the expense if you need to have superior corrosion resistance. For many other applications, grade 304 stainless steel will serve perfectly fine. Call and speak with one of our Field Engineers to discuss which grade of stainless is best for your application.
VALUE ENGINEERED WITH THE QUALITY OF STAINLESS STEEL
Contact Filter Sciences today to discuss your filter needs and discuss your options. We have a wide range of stainless steel filters to meet your needs and our prices are very competitive with carbon steel. Call today to improve your ROI with Stainless Steel Housings.