Diluted Weld Deposit Chemical Analysis
Diluted Weld Deposit Chemical Analysis
(OP)
This may be a basic question but, I am fairly new to welding chemical analysis.
I am using an XRF spectrometer to measure weld deposit on a 3/4" NPS A182-TP316L socket weld (as per client specs).
I am wondering what code and table the analysis should conform to.
Section II Part A is for Pipe and fittings, Section II Part C is for Undiluted Weld Deposit, and Section IX A number 8 is for procedure qualification.
I don't know which is applicable to the completed weld in this case.
Thanks
I am using an XRF spectrometer to measure weld deposit on a 3/4" NPS A182-TP316L socket weld (as per client specs).
I am wondering what code and table the analysis should conform to.
Section II Part A is for Pipe and fittings, Section II Part C is for Undiluted Weld Deposit, and Section IX A number 8 is for procedure qualification.
I don't know which is applicable to the completed weld in this case.
Thanks





RE: Diluted Weld Deposit Chemical Analysis
What exactly is the customer specification - to verify a 3xx series filler metal was used for the socket weld? Otherwise, XRF is a qualitative analysis and should be used as such for typing or sorting of metals, not for reporting chemical composition results.
RE: Diluted Weld Deposit Chemical Analysis
I'm just wondering also, how much will the dilution from the parent material effect the analysis of the weld?
RE: Diluted Weld Deposit Chemical Analysis
RE: Diluted Weld Deposit Chemical Analysis
When the weld cap is scanned with XRF spectrometer what material specification should the Cr, Ni, and Mo results be within, Sec 2 C or Sec 9 A8 chemical composition.
I can't seem to get a definitive answer from the client or anyone else within my company.
Help would be greatly appreciated.
RE: Diluted Weld Deposit Chemical Analysis
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Diluted Weld Deposit Chemical Analysis
RE: Diluted Weld Deposit Chemical Analysis
RE: Diluted Weld Deposit Chemical Analysis
RE: Diluted Weld Deposit Chemical Analysis
RE: Diluted Weld Deposit Chemical Analysis
I have to agree with brimstoner here, I do a lot of PMI work using xrf equipment both in power plant and chemical plant. One of the main problems I come across quite a bit is identification of 316 elements. You say that the filler is 316L, but the chemical composition of 316, 316L & 316H are all pretty much identical apart from Carbon content, which xrf (unless you have the latest and greatest versions) do not pick up. Also if your equipment cant tell the difference between 9Cr & T/P91 you might have a problem with the equipment.
I would also agree with meteng here in that the effect of dilution rates are marginal at best.
Declan