S335 J2 vs S355 J0

[calliste]

Hello,

In what conditions S335 J0 can be used instead of S335 J2?

 

[calliste]

Sorry, I'm new in material zone so i mistyped the material grades then question should be
"in what conditions S355 J0 instead of S355 J2?"
Thanks

 

[vthomidis]

The main difference between structural steel grade S355 J2 and JO
is that at the notch impact test (longitudinal ) :

JO : absorbs energy min. 27 J at temperature 0 C
J2 : absorbs energy min. 27 J at temperature -20 C

So it concerns impact behaviour at different temperatures.

If -20 C temperature is out of every probability in the particular use of the steel then choice of S355J0 is OK.

In both cases however the price ( cost of steel ) is almost the same....

 

[calliste]

Does it mean JO can be upgrade and acceptable if i can do longitudinal -20 degree impact test ? Another question is about the chemical compositions.

for JO materials P, S values should be max 0,030 and N need to be 0,015
but for J2 P, S values are 0,025 and there isnt N ?

 

[vthomidis]

As for P,S values are more like
J0- P,S : 0,040 percent N : 0,015 ( all maximum )
J2- P,S : 0,035 " N : no

( for long products P and S may be 0,005 more ).

All those qunatities are actually very small, so you should estimate if they are a concern at all for your application
( most probably they are not - this quality being conventional
construction oriented. )