Dilution Percentage

'....I would like to know the dilution percentage (%) for each welding process...'

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That would be valuable information to have. Unfortunately there isn't a set dilution percentage for each welding process. There are numerous variables, some general, some process specific. Slight changes in the variables can result in large changes in dilution.

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Position, direction, speed, material thickness, backing, joint type, pulsed or continuous, wave shape, pulse duration, vibration, workpiece temps, and numerous other things can affect dilution.

My joint configuration as follows.

Single 'V' - 60 Degree angle (30 Degree bevel on both pipes)

Root gap - 1.8 mm

Root face - 1.5 mm

Welding on 5G position (Pipe fixed in horizontal position)

Progression - Vertical Uphill

Material thickness - 15mm

Backing - Nil

Continuous welding (ie, no pulsing for GMAW)

Preheat - 177 Degree Celcius (Only on P22 side)

Filler Wire - ER NiCr-3 (SFA - 5.14)

Electrode - E NiCr Fe-2

Still, too many unknown variables. One way to get an idea about dilution would be to run some test welds and then cut cross sections. Inspect the cross sections compared to a tacked but not welded sample so that you can get a good idea about penetration.

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The dilution is just the percentage of the weld pool that was originally base metal, so determining the cross sectional area of the weld and the cross sectional area that the base metal formerly occupies that the weld now incorporates will allow you to determine pretty closely the dilution at that point in that sample. You may want to run a number of samples to get an idea about consistency.

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If you just want an answer, I'd say chances are good that dilution will generally be in a range from 10% to 40% for the parameters you describe.

Dr.Professor truth is not at all, how about this chart? If you give some feed back, then I can inform Lincoln Electric,Bohler, ESAB and Kobe to change their calculations. One cr4 dumbhead already put good answer for your second reply.By the way professor, American Welding Society need your service ASAP.

If you know that the answer you seek is in AWS publication then why not just buy it?

Were you hoping somebody else would buy it for you? Possibly read it for you too?

You seem like an odd fellow AP#1. What's with the attitude? Are you OK?

Did I mention anywhere that this SPECIFIC info. is available in AWS Handbook?? Did I mention anywhere someone should read AWS handbook for me?? LOL

Btw, What is the current climate in your region and report it ASAP? LOL

Ok I'll bite.

Did I mention anywhere that this SPECIFIC info. is available in AWS Handbook??

Yes

Did I mention anywhere someone should read AWS handbook for me?? LOL

Not directly, but you did ask a specific question and inferred that its answer could be found by reading a book that you didn't have, so, I'm asking if that's what you wanted someone to do for you.

Btw, What is the current climate in your region and report it ASAP? LOL

Climate or weather? Climate is tropical monsoonal. Weather?..That would depend on where you were in my region. My region is Southeast Asia. FYI the weather in Phnom Penh is "take a raincoat just in case" and try to get home before it pisses down.

Let me know your e-mail address so that i can send the required AWS documents for your career development.First ask your mentor, which document is most suitable for your job.

Your response is strange. You seem to be complaining about the response I provided to the question, yet the range predicted by the chart you seem to think is authoritative is within the range I estimated. I also doubt you will find anything I have written substantially contradicts guidance provided by AWS.

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What exactly is your problem?

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What is it about posting anonymously that makes you abhor anything beneficial and worthwhile....or are you just as worthless even when you aren't hiding?

That's how I interpreted his response too.

Problem or motive?

Professir wal, what is the current time in your area and report it ASAP.

By the way how is my %of dilution chart? I prepared it after my extensive research and shared it with chieentists in CR4 for free of cost.

Professir(sp) wal, what is the current time in your area and report it ASAP.

GMT +7hrs

By the way how is my %of dilution chart? I prepared it after my extensive research and shared it with chieentists in CR4 for free of cost.

Is that your chart? Looks like a screen shot. What's with the print icon? What is a chieentist? What else do you want, need or take medication for?

You've provided your own answers pretty well it seems. Is there a point to this discussion?

sorry professior wal, i never thott that it was your wrok

thaank u sooo much professior wal for ur resaarch work. i am highly indebted to u.

Are you done yet?

Some of us here just observe, ask questions and read responses to learn. Not too sure what I've learned about you though?

Back to you now... Why did you need the information you requested in the first place? That answer might actually be interesting.

You also seem to like these: ... I can't make any sense of them. Choose one that you like.

Thaank u soooo much professior wal, again i am hihgly indebteied to you for yuor research wrok

Perfect!!

Perhaps we've worked together in the past?

my query was for % of dilution encountered during each process.Your answer was general dilution range.So, answer and question contradicts. By the way, how is my chart? I prepared it after my extensive research and shared it in CR4 for free of cost

So I provided good info for your inquiry in reply to my initial comment, i.e. for non-pulsed GMAW, and you berate my offer to assist you because I didn't go further and give your ridiculously wide ranges for each process? You don't have many friends and don't get along with the people you work with, do you?

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You obviously didn't understand the message. The thing to take away is that the ranges provided (even in your chart) are too wide to be of use. If you need to know about dilution, the answer isn't in berating those trying to assist you in CR4, the answer is in running representative samples and then analyzing the results.

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That should allow you to resolve the problem about unknown dilution. I don't think I (or possibly anyone) can provide much help for your personality problems.

Thank you professor truth is not at all. Btw, any correction is required in the chart sir?

Thaank u soooo much sir

Sir, the ranges in the chart is wide. But with the help of chart value, a skilled person can calculate the microstructure for higher dilution , lower dilution and mean dilution. From these data we can predict the microstructure. It is not rocket science sir.

sir, I cannot take your max range of 40% for GTAW a.k.a TIG (Gas Tungsten Arc Welding a.k.a Tungsten Inert Gas welding) sir.

How utterly asinine.

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First, as I already stated, my response was to your follow-up question in your response to my first comment which specified GMAW non-pulsed. It was not for GTAW.

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Second, do you really lack understanding of what is entailed by the term 'range'? By your own copy-paste chart follow up comment, you should be able to see that GTAW (even though that wasn't what I was referring to) can be expected to have dilution that will not exceed the max range I stated. If you absolutely had to criticize the information I provided for you, you could have noted that the low range I provided with respect to non-pulsed GMAW was 5% too high for GTAW.

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In retrospect, if you are responsible for the welding, you don't need to worry about dilution. With your attitude towards someone offing you assistance, it is almost a certainty that numerous other more serious, and likely intractable (for you), problems stand in your way.

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Enjoy the anonymous triumph you apparently see yourself basking in.

ok agreed sir. thank u very much sir. i found a real welding genius in you sir. keep it up sir. by the way, how long you are in welding research/business sir? what are all the materials u have handled so far sir ? i am curious sir...

..i found a real welding genius in you sir....

How did you manage that?

One of my first career paths was as a welder. I received my first certification, SMAW 6G pipe, almost 3 decades ago. I did some work with MIG and fluxcore, but most of my experience, and my passion was precision welding, mostly TIG and occasionally PAW. As far as what materials I've handled, early in that career, I handled some true junk doing repairs on hydraulics and dumpsters.... not pretty. Later on, doing precision welding, I got to work with much cleaner and sometimes exotic material. I have repaired magnesium (seated on a chair with rollers, with an observer holding onto a rope tied around my waste and a class D extinguisher handy), I was taught to weld 3/2.5 Ti outside the bubble by the person who got the process itself certified, I've welded a lot of stuff that required significant magnification for most of the work and a number of alloys that you've probably never heard of. A lot of my later experience dealt with application of pulsed TIG to existing processes.

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That was a while back, and while welding hasn't been my business in the professional sense now for a number of years, it still interests me, so I keep current on various subjects in the field.

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I also enjoy learning from others who may be able to enhance what I know. The funny thing is that when you are talking to someone you don't know, they might might be an incredible resource, so it pays to treat them as such until they (usually quickly) prove otherwise. I certainly wouldn't dream of alienating myself from benefiting from the experience of others by displaying such buffoonery as you have in this post.

I am working with Carbon Steels, Low temperature Carbon Steels, Cr-Mo Low alloy steels, Creep strength enhanced ferritic steels, Austenitic Stainless Steels, Ferritic Stainless Steels, Martensitic Stainless Steels, Duplex Stainless Steels, Titanium, Aluminium, Copper-Nickel, Nickel base super alloys, Cobalt based hard facing alloys, Corrosion resistant weld overlays(CRO) and RTR(Reinforced Thermo Setting Resin) materials.

I never worked with Tantalum,Zirconium and Magnesium.

I have experience in fabrication of super critical boilers, pressure vessels, storage tanks, cross country pipelines, power piping, process piping and structural steel works. All are coded work (ASME Sec-I, Sec-VIII,ASME B31.1,ASME B31.4,ASME B31.8,ASME B31.3,AWS D1.1,API 650 & EN).

I would like to know the special alloys you have worked before?Could you explain a bit more about what do you mean by precision welding? is it health care equipment welding such as laser beam welding, electron beam welding etc? I am curious..

I am handling welding codes such as ASME Sec-IX, API 1104, AWS D1.1 and EN 287-1 extensively.

Sir truth, my friend studying in OSU told me that secrets of your special alloy details are available HERE. So, he told me that it is not a big deal.He told me that following link will help anyone to understand about other material welding. is it right sir? i am curious.

Zirconium welding

Magnesium welding

Tantalum welding

Yup. Your friend is right, it is definitely not a big deal. ...and like this the remainder of this discussion not worth talking about any further.

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unsubscribes

Sir Thank u very muck. I also do not want any further discussion with you.ROFL

My friend currently studying in OSU told me never discuss engineering subject with carpenters.

We welcome your unsubscription from this thread.

Sir truth, have you heard about '6GR' position?? i am curious..

Sir truth, i forgot to mention about repair of haulpaks of westinghouse as it was not a coded work in my career.So less importance.

http://www.youtube.com/watch?v=4pQ6VUSPXvU

http://en.wikipedia.org/wiki/Haulpak

The thread indicates that a local investment in the required textbooks is the correct way forward.