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Difference between AISI 316 stainless steel and AISI 316L stainless steel

Stainless steel 316L

Stainless steels, thanks to their chemical composition, are metal alloys, which are naturally corrosion resistant.

AISI316L stainless steel, known as 1.4404, is different from AISI 316 (1.4491) stainless steel because it has less carbon inside. The “L” actually stands for “low carbon” content. Specifically, the carbon quantity present in AISI 316L stainless steel must be ≤ 0,03. On the contrary, in AISI 316 it must be ≤ 0,07.

The other elements in the two alloys are the same:


All Fra.Bo stainless steel fittings are produced with AISI316L stainless steel and they guarantee an excellent corrosion resistance.  

For this reason, they are perfect for drinkable water distribution systems, where it is essential to guarantee the maintenance of water pureness, avoiding time degradation.

Frabopress 316 Securfrabo

Frabopress 316 V

Frabopress 316 Securfrabo M
Frabopress 316 M

Frabopress 316 GAS

Frabopress 316 GAS V

Frabopress 316 GAS M

Frabopress 316 GAS M

Frabopress 316 big-size

Frabopress 316 Big-Size

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