Testing of SS316


(Ravi) #1

If any vendor claims SS 316 vessel , then how we can measure that which type of SS is this .
could anyone define any in-house test parameter (chemical analysis) by which we can assure the claims of equipment.


(Rahul Kumar ) #2


Moly Test
A simple test is molybdenum content only because SS316 have 2to 3 % Mo where as SS304 does not have molybdenum.


(Rahul Kumar ) #3

Acid testing is one test that will separate 304 and 316 grades of stainless steel.:-
Sulphuric acid strongly attacks 304 grade, producing green crystals and a dark surface, but its attack on 316 grade is slow and produces a brown surface
Hydrochloric acid attacks 304 grade very rapidly and produces gas, but attacks 316 grade only very slowly.