Page 39 - Fountain and Water Works | Wed Generale Catalogue
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AISI 316 and AISI 316L are austenitic stainless steel alloys with 

chrome (16-18%), nickel (11-14%) and molybdenum (2-3%). 

AISI 316L is identified by a lower carbon rate (less than 0.035%, 

instead of 0.08% for the AISI 316).

The main differences between 304 and 316 alloys, let alone the 

AISI 316 higher cost, is due to the 316’s higher austenicity in the 

wake of a higher rate of nickel.

A 2-3% of molybdenum in the AISI 316/316L can foster the 

growth of stronger molybdenum carbides then chrome carbides 

and make sure a better carbide rust strength (due to seawater 

and defrosting salt) . The carbon rate is pretty low (0.008%) 

even if some austenitic steel alloys can have a higher carbon 

rate (0.03%). Due to a high rate of expensive components 

(Ni,Cr,Ti,Nb,Ta) austenitic steel alloys are the most expensive 

among the common ones

Their basic features are:

• excellent rust strength;

• easy cleanup and good hygienic performance;

• easy welding, ductility and forgeability;

• no magnetization when fully recooked.

Their austenitic chemical structure (with CFC molecule)makes 

them immune from “ductile-fragile” transition – which is a typical 

weakness of ferritic compounds – so they keep being tenacious 

and strong up to criogenic temperatures (liquid helium). The 

particles’ overall dimension is higher than the ferritic alloys one 

and makes these alloys stronger when resisting viscous sliding: in 

the wake of this, they can be used to store liquids at the highest 

temperatures (600 °C and more).


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