Dismillar material Welding

[Maharajan Subramanian]

Dear experts, 

In my Hydro Electric Project  materials using A517Gr.F and A537CL-II. 

For A517Gr.F using E 11018M and A537CL-II using E 9018M.

Only one joint have a A517Gr.F with A537CL-II. 

Which Electrode is better for PQT. 

Your valuable guidance is highly appreciated.

Thanks with regards, 

S.Maharajan. 

[Ali Sherif]

E9018M will be suitable

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[sridhar cn]

We require an electrode that is compatible with the higher strength and toughness of A517 Grade F, and 

It should also maintain a good weldability with A537 Class 2. 

E11018 is preferable for welding A517 Gr F, A537 Cl II, or dissimilar joints, as it matches the strength 

and toughness requirements of both materials and is designed for high-strength, low-alloy steels.  

E9018M is suitable for A537 Cl 2, and provides good toughness but may not meet the impact requirements 

for A517 Gr F at low temperatures.   

Use an appropriate preheat (150°C–200°C) as per welding codes to avoid hydrogen-induced cracking 

and interpass temperature (200°C) to control overheating.

C Sridhar.

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