Dear Friends,

To qualify Welding Procedure for Corrosion Resistant Overlay of Alloy 825 on A 352 Gr. LCC Casting, which tests are required to be done on test coupon to meet requirements of NACE MR 175, API RP 582 and Section IX ?

Is PWHT necessary ? From which location of overlay and base metal, hardness to be checked ?

Can we take ASTM A 516 Gr. 70 Plate instead of LCC ? (P No. & Group No. is same for both). It is allowed in Section IX, but is it acceptable if we have to consider NACE MR 175 & API RP 582 ?

Any other special care to be taken ?

Can anybody guide me ?