Dear Friend ,
try to replace E 2594 by E2595 .. it have W element which is promoting ferrite
Best Regards ,
ENG. Ahmed Osman
On Thursday, April 29, 2021, 11:50:38 a.m. GMT+3, Chintan <chintan51@gmail.com> wrote:
Dear Expert,
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After Filling & Capping of Weld Metal, During % Ferrite check via Feritoscope values are showing less than requirement, How ever all other test i.e. Hardness, PMI etc. are well accepted.
Kindly advice on possible root cause as well as tips to achieve high Ferrite
Please find below details for your quick ref.
Material Grade - SDSS -UNS s32760
Joint type -Pipe - Butt weld - 18 mm thick
Welding Process - GTAW + SMAW
Welding Consumable - ER 2594 + E 2594-15
% Ferrite - GTAW ( Root ) - 35%, SMAW ( Capping) - 25 -28 %, Base metal - 35to 40%, HAZ - 32 to 35%
% Ferrite - Spec Req - 30 to 70%
Inerpass mentained - 100°C for GTAW, 120°C for SMAW
Heat input - GTAW - 0.8 to 1 KJ/mm
SMAW - 1.2 KJ/mm
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