Re : [MW:17609] Welding of SS-310 to Incoloy 800

[khemici badri]

Hi,   The ERNiCr-3 filler metal is well suited for such a dissimilar joint.   Regards   Badri   --- En date de : Lun 6.5.13, shahzad <sheh...@gmail.com> a écrit : De: shahzad <sheh...@gmail.com> Objet: [MW:17609] Welding of SS-310 to Incoloy 800 À: material...@googlegroups.com Date: Lundi 6 mai 2013, 14h01 Dears Hi, We wana weld SS-310 to Incoloy 800, could we get a sound weld by using ER-310 filler for dissimilar joint. Would it cause cracking of the dissimilar weld with ER-310 filler. Normally NiCr base fillers (F # 43) are used for these kind of dissimilar welds. Regards. -- To post to this group, send email to material...@googlegroups.com To unsubscribe from this group, send email to materials-weld...@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.

[Ramin Kondori]

Dear Shahzad:

In these cases, old-school welding engineers use the below diagram for prediction of structure.

It's a little bit complicated but I will try to to give you an idea:

• You should have chemical analysis of your candidate filler metal, SS-310 and Incoloy-800. This is required for calculating Cr-eqv. (horizontal axis) and Ni-eqv. (vertical axis).
• You will have one point for filler and one for each of the base metals.
• Interpolation between these three points (considering dilution) will give you the approximate point for weld metal and you will be able to predict the structure. Then you can decide which filler to use... 

Also the following page will give you a good idea about using schaeffler & Delong diagrams.

http://www.asfabrications.co.uk/assets/SchaefflerDiagram.pdf

Regards

Ramin Kondori

Sr. QA/QC Engineer

SINOPEC

r.ko...@petroyada.com
+98-2123592322
+98-9132150320

[Ramin Kondori]

Dear Shahzad:

Of course each diagram has its own application range and limitations which should be considered.

Schaeffler & Delong diagrams are normally used for prediction of weld metal structure in weldments which include austenitic stainless steels.

Ni-base weldments are quite different since they are already fully austenitic and are usually "harmless" unless cleanliness or the precipitations cause problems.

Regards

Ramin Kondori

Sr. QA/QC Engineer

SINOPEC

r.ko...@petroyada.com
+98-2123592322
+98-9132150320