[MW:10685] RE: 10682] Use of ERNiCrMo-3 For welding SA312 Tp 316L

Dear Mr. Bhandari,

 

In case of wet gas this could become a problem because of potential differences between filler metal and base material which can cause galvanic corrosion.

But you also have a problem with the welding procedure which is not valid for this combination. Normally you will weld TP 316L material with filler metal group F.6 according to ASME QW-436. In this case you got filler metal from group F 43 according to QW-436. When looking at essential variables for GTAW in QW-256 you will see that this is an essential variable and therefore the PQR is not valid.

 

Met vriendelijke groeten / Best Regards

 

Herman Pieper

 

Pieper Quality Support & Inspection

Phone: +31 (0)521 380083

Fax:     +31 (0)84 7539225

Cell:     +31 (0)6 51691215

www.pieper-qsi.nl

 

Van: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Namens Vikas Bhandari
Verzonden: vrijdag 15 april 2011 10:59
Aan: materials-welding@googlegroups.com
Onderwerp: [MW:10682] Use of ERNiCrMo-3 For welding SA312 Tp 316L

 

Hi All

 

I have a weld procedure which is to be used for welding SA312 TP 316 material (3-6 mm thickness). The pipe would be carrying gas and operating temperature is -130 to 60 degree C.

 

 The  ferrite determination has not been carried out on the weld as required by the standard. Also usually the consumable used for welding 316L is ER316L (TIG). But the consumable used here is ERNiCrMo-3 (SFA 5.14, usually used for cladding or Alloy 625 and can be used from cryogenic to very high temperature). Would there by any implications of using this electrode in the case discussed? 

 

Your response in this regard would be much appreciated.

 

Thanks

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