the chemical composition.
For carbon steels you will need the carbon content to identify the
material kind so XRF will not help you. But in this case the amount of
carbon will fit in a lot of material qualities so you will need
additional mechanical properties as well to identify the material. But
also with that information available it will be difficult to determine
the exact kind of material grade because there are no specific
elements present in the chemical composition which make the selection
easier.
Best Regards,
Herman Pieper
On 5 nov, 05:06, "pgoswami" <pgosw...@quickclic.net> wrote:
> Hi U WYNN-NAING,
>
> Looks like the method adopted for PMI was spectroscopy, that's why "C"
> content is available in the analysis. Spectroscopy tells you the material
> composition but may not be effective in identifying material.
>
> Try PMI with Niton.The XRF technique will not detect "C", but other elements
> would be detected. In addition each state of art Niton machine will have an
> in built data base.This helps to indentify an unknown alloy, i.e Niton
> analyses the result to loaded data base and try to match the results to the
> nearest grade. You may discuss the same to the NDE organization before
> performing the test.
>
> The attached articles ( highlighted texts) explains the equipment and it's
> functions. We've the similar equipment (handheld XRF) , every analysis comes
> with the nearest match available in the Niton Equipment.
>
> Thanks.
>
> Pradip Goswami,P.Eng.IWE
> Welding & Metallurgical Specialist & Consultant
> Ontario,Canada.
> Email-pgoswami@ <mailto:sympatico.capgosw...@quickclic.net> sympatico.ca,
> pgosw...@quickclic.net
>
> _____
>
> From: materials-welding@googlegroups.com
> [mailto:materials-welding@googlegroups.com] On Behalf Of SAQIB SHIRAZI
> Sent: Friday, November 04, 2011 4:05 PM
> To: materials-welding@googlegroups.com
> Subject: RE: [MW:12880] RE: 12864] Type of steel as per chemical properties
>
> Another option can be used after performing Mechanical testing which can
> give tensile strength from which we can guess in which grade it is
> falling???
>
> I mean if its strength above 60,000 psi then it can be consider as A307 Gr.B
> while chemical composition will tell its grade.
>
> _____
>
> Subject: [MW:12872] RE: 12864] Type of steel as per chemical properties
> Date: Fri, 4 Nov 2011 11:13:40 -0500
> From: dsteven...@usa.eurotainer.com
> To: materials-welding@googlegroups.com
>
> Are there any markings on the head of the bolt or the end of the bolt? If
> you have marks they can be traced to what it should be.
>
> From: materials-welding@googlegroups.com
> [mailto:materials-welding@googlegroups.com] On Behalf Of U WYNN-NAING
> Sent: Friday, November 04, 2011 4:53 AM
> To: materials-welding@googlegroups.com
> Subject: [MW:12864] Type of steel as per chemical proterties
>
> Dear Experts,
>
> We did PMI test on one unknown machine bolt from crane boom rest and result
> is as follow:
>
> Can someone tell me how can we trace the steel grade base on this result.
>
> Is there any software available?
>
> Thanks and Rgds,
>
> WN
>
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>
> image001.jpg
> 28KWeergevenDownloaden
>
> image002.jpg
> 17KWeergevenDownloaden
>
> Positive Material Identification (PMI).pdf
> 321KWeergevenDownloaden
>
> Handheld_XRF_Identifies_Alloy_Composition_of_Piping_in_Petrochemical_Plants_-_Article.sflb.pdf
> 1678KWeergevenDownloaden
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