Dear Jijilal,
It is a strange fact that you have already qualified P15E+P8 with ER-309!! You have to use Inconel filler wire or Nickel based filler on this dissimilar metals, as per your requirement. And you have to check how you qualified the WPS, by buttering or by normal butt welding and PWHT. I am saying this because normally, we won't do PWHT to P8 materials because of high PWHT temperature, which may affect the paramagnetic properties of stainless steel.
Thanks & Regards
Rejoy Thomas
STF SpA
On 27 January 2016 at 12:37, JIJILAL K M <jijilalkm2@gmail.com> wrote:
--Dear Experts,We've to weld 4" x 6.02 mm HRSG boiler piping joints (only 2 nos.).Materials are P5B + P8 ( ASTM A335 P5 + ASTM 304L SS) .There is no such qualified WPS.instead we've a Qualified WPS for P15E + P8 ( ASTM A335 P91+ ASTM 358 316L SS) .Can we use this WPS using filler wire ER-309?JIJILAL K.M.
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