No problem with the welding code.

It can be also European, not only American.

Here are some leads;
https://www.eng-tips.com/viewthread.cfm?qid=261857
https://www.eng-tips.com/viewthread.cfm?qid=261852
https://www.eng-tips.com/viewthread.cfm?qid=261859
https://www.eng-tips.com/search.cfm?q=welding+tant...
http://files.aws.org/wj/supplement/WJ_1972_06_s304...

Google is your friend, but be careful with this: welding Ta and selecting the appropriate wire is not something done just like that. What is your background? Whats the application for? Do you have more details? Your posting and question formulation gives the impression you may not be qualified to ask such questions.

Quote (XL83NL)

Your posting and question formulation gives the impression you may not be qualified to ask such questions.

Indeed, and crowdsourcing is not a sound engineering approach to solving it.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

It is an application for nutrition company.

The customer requirement is only GMAW or GTAW processes.

I am enough qualified to ask these questions, but this situation of this dissimilar welding is new for my experience.

So, I have just asked about the welding wire, as I did not want to make the question very complicated.

XL83NL

Thank you for your participation. But, it is not good from you to judge my qualification. According to my polite and good education, I will not answer you with this which you wrote to me.

With all due respect, your previous postings do not substantiate your point very well. All the voluntary work that members put into this website is free; even if an answer is not what you hoped for, you must understand it's the best advice you may find.

You are completely right. I agree with you.

I am just at work and searching for a solution, this was the reason.

I would like to thank you again for your explanation.

I am trying to find a solution for this dissimilar welding.

I am not sue that this weld can be directly made. Since your customer seems to believe it can be made, I would advise asking your customer.

The answer is simple: the weld cannot be directly made, and nobody builds tantalum equipment this way. The fact that 316 is a VAPOUR at the melting point of tantalum might be your first clue!

Quote (MAbdo)

XL83NL
Thank you for your participation. But, it is not good from you to judge my qualification.

Speaking for myself, I judge my own qualification, and I consider it a fundamental aspect of professionalism that I not work outside of my skill set. I expect other engineers to reciprocate, but sadly, welding engineering is the most heavily poached specialty in engineering.
`
My revenge is that I also do failure analysis - it pays better and it's harder to fake.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

ironic metallurgist,
I 100% agree with your comments.
I am continually astounded by the amount of people who post on here as their companies Welding representative but do not have a clue.
This is not directed at you MAbdo - there is a long list of guilty persons.

What frustrates me most is part of my Scope of Work is/was review and approval of PQRs, WPSs, ITPs and other associated quality documentation - I have been out of work for 13 months and yet every day I see someone post a ridiculously basic question regarding Welding Procedures on here.
I wonder what their bosses would think if they knew their Welding Specialist was using an internet website to replace training & experience ?

Sorry if I hijacked the post,
Cheers,
Shane

DekDee, their boss would probably think that it is good for them to do it this way.
Their bosses are more clueless than they are, that is why we are in this situation.

Reactive metals (Al, Ti, Zr, Ta) cannot be welded directly to other metals. When structural welds are needed they typically used explosively welded transition strips so each metal is being welded to a like material.

There are some special vacuum brazing techniques that will work.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

The less they know, the more we make. Their pain is our profit.

That being said, at least the person posting the question knows where to come to find a possible lead in finding a viable solution to their dilemma.

I like the explosive welded transition pieces. That is information that points the person in the right direction.

We can’t be experts on every subject, sometimes we need a nudge to get us thinking about a solution we never considered.

Best regards - Al

Al,
Hope all is well,
Not sure if you remember Jon Lambert (jon200013) from our old AWS forum days.
He summed it up pretty well when he said you shouldn't post a request for help on a forum until you have done everything you can to try and solve the problem yourself and then we (us volunteers) will try to help.

There is too much of this going on on this forum now
a - Poster doesn't have a copy of the code/standard they are supposedly working to.
b - Poster doesn't understand the code/standard they are supposedly working to.
c - Poster is too lazy to even open the code/standard they are supposedly working to.

Back to this post.
Good old Google would have told MAbdo that you cannot weld Tantalum to Stainless Steel so then he would not have been on here asking what welding wire to use.

Cheers,
Shane

d - Boss (frequently an engineer) thinks your PE designation means you should be able to take on anything and everything.
`
It gets much worse on LinkIn forums, where you find an endless worldwide supply of amateurs and trainees routinely seeking assistance for their daily tasks by crowdsourcing. Credentials have proliferated, but some of the questions posted by IWEs are shocking.
`
Personally I decided long ago NOT to seek IWE designation, although it would have been easy and inexpensive. Other WEs I know have done it for the prestige, but considering everything I look at IWE as a downgrade.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

Jon said it best.

This reminds me of a fossil fuel plant where the engineer and contractor lined the stack with titanium sheets. They told me that upon starting the boilers they have 4 x 8 sheets of titanium shooting out of the stack and landing on the cars in the parking lot. The contractor welded stainless pads(what kind of stainless? You know, the shiny silver kind.) to the carbon steel stack liner and the then welded the titanium to the stainless.

You can't make this stuff up.


Best regards - Al

ironic metallurgist,
Again I agree with you (d).
Someone posted on here recently saying he was on a pipeline project and had put together a list of 22 x PQRs he thought he needed to run and wanted confirmation he had all thicknesses covered.
Firstly it was quite obvious that it was a Power Station project (B31.1) and not a pipeline project.
Secondly, it would have taken at least half a day to review and comment on his/her list - for free ?

I asked the poster if he had actually applied for his role or was he an engineer who was pushed into it by his boss (as you noted) but he never replied.
Cheers,
Shane

New power stations run at 2500 psi. That's enough to harm people when things let go. At some point our career needs have to accommodate safety considerations.
`
My local jurisdiction (TSSA) requires qualifications up the wazoo for registering a design, yet they will register a welding procedure prepared by my pet chimp.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."