Repair of SS316L Clad vessel with SS317L

By Rajan O.A. Date 06-29-2004 16:29

Based on Electrode Manufacturer’s recommendation E317L electrode is suitable for welding CS to SS 316L or for SS316 / 317.

Hence our understanding is that it can be used for repair of SS316L clad vessel subjected to pitting corrosion due to the accidental introduction of untreated sea water.

SS317 is proposed as the repair can be done in a single layer unlike the conventional SS309 + SS316L.

Please provide more details if any.

Regards,

Rajan

By Bonniweldor (**)

Date 07-12-2004 22:01

Type 317 can be used to repair type 316 clad. Mo is added to 316 and 317 alloys to improve the chloride pitting resistance (look-up "PRN", the AvestaPolarit website)

The use of type 309 as an underlayment for the surface clad intends to ensure the weld metal diluting carbon steel substrate retains the austenite structure and avoids a martensitic transformation.

By Niekie3 (***)

Date 07-18-2004 19:52

Hi Rajan

317 filler only has a marginally higher alloy content than 316 filler. As such, it is not really made for dissimilar metal welds. It merely has better pitting and high temperature creep properties.

This will be fine for repairing the 316, but if you are going to weld onto the C/Steel base metal, then you will still need the 309.

Regards
Niekie Jooste
Fabristruct Solutions