Hard Surfacing - Weld Overlay

Hi,

First of all welcome!

Then, a friendly comment: Stellite 6 (Deloro trademark) is a cobalt base chromium alloyed metal resistant to wear. It can be found as metal parts and filler metal for hardfacing, which seems your question.

The ASME Code designation for this SMAW filler metal is E CoCr-A (SFA 5.13)

It´s a very common hardfacing alloy and your question indicates a feeble welding and metallurgy knowledge.

If you have to make welds which need to be qualified to ASME Code I would strongly recommend you to use the services of a qualified welding engineer.

You can find many references on the web related to that process. Just google the designation (E CoCr-A), but specific modifications of common welding filler suppliers conditions may be necessary depending on your specific application: Stainless steel is a broad steel family with a wide range of properties and behaviours, the base metal thickness and thermal conductivity will affect the cooling rate as well as the interpass temperature, welding current, speed... (heat input), etc.

As you see there are many variables to give a simple answer. Anyway, to help you to start your way here are a couple of links.

http://www.stellite.de/Portals/0/Downloads/Consumables%20english.pdf

http://www.lincolnelectric.hu/pdfek/gri-tec/mdsGritec-B8-1.p164-195.pdf

Kind regards

Mr. Kwetz,

I am truly amazed on how you can read a simple question and assume that I have a feeble welding and metallurgy knowledge. I guess you did not understand what I was wanting. What I was asking for is the pertinent information so that I could apply it to a PQR and do the required testing to have it established, I was trying to get away from re-inventing the wheel so to speak. I assume you are a very intelligent man, however I also believe that you are an arrogant sun of a gun...

Have a good day, I will go else where to get the information I need.

I am out of this forum...

Hi Ron T. R.

I apologize if you feel insulted and I beg your pardon. I didn't try it (otherwise I wouldn't give any information). Maybe the problem is a mix of my lack of English knowledge and yes, a bit of arrogance.

Said that, your OP said: I would like to know the recommended welding volts and amperage for the different sized SMAW electrodes along with any preheat or cool down requirements and interpass temperatures that must be adhered to.

Now you say: What I was asking for is the pertinent information so that I could apply it to a PQR and do the required testing to have it established.

Any manufacturer use to include in their datasheets the conditions in which their filler metals should be used. That's the reason I included a couple of links.. I thought this could help you to search in the website of the specific electrode manufacturer.

But you give a very short information "S/S" can mean many things. It's not the same to weld overlay a, lets say 304 type than a 17-4 PH because they behave different during the welding process. For example, in that case you should be careful with heat input to avoid "sensitization" of 304 grade. So the specific application is important and more if a Code compliance is required.

P.D. The welding variables are established in the WPS which is previous to the tests, whose results are included in the PQR.

Kind regards