Chemical Composition issue

admin

Hello,I am trying to create a WPQR but I am confused about the materials. I've tried several search engines by using the material's composition but I couldn't get a reliable result. Could someone please link me a reliable source which I can find out what these materials are ?  I've uploaded the pictures. Greatly appreciate any help. Thank you best regards
Reply:SS348 is close.  Your chemical analysis doesn't cover some of the less common alloying ingredients found in this grade.  How accurate is your analysis?  If it's one of those hand held XRF/EDS spectrometers you could be way off in composition.  Or, if this is some low cost material it could be contaminated with all sorts of tramp alloying elements that aren't specifically excluded from the material specification.  Third possibility is you've got some very low quality material that's just plain out of specification and doesn't match up with any recognized standard.  It's also possible that it's steel that complies with some Chinese specification; which are hard to match up using information available for free on the internet.Here's a link to some info on SS348.http://www.matweb.com/search/DataShe...56b41bb&ckck=1"AL 348 is a stabilized stainless steel which offers excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800° to 1500°C. The addition of columbium and tantalum stabilize against chromium carbide formation. For nuclear applications AL 348 has restricted cobalt and tantalum content."Good luck.Benson's Mobile Welding - Dayton, OH metro area - AWS Certified Welding Inspector
Reply:Originally Posted by A_DAB_will_doSS348 is close.  Your chemical analysis doesn't cover some of the less common alloying ingredients found in this grade.  How accurate is your analysis?  If it's one of those hand held XRF/EDS spectrometers you could be way off in composition.  Or, if this is some low cost material it could be contaminated with all sorts of tramp alloying elements that aren't specifically excluded from the material specification.  Third possibility is you've got some very low quality material that's just plain out of specification and doesn't match up with any recognized standard.  It's also possible that it's steel that complies with some Chinese specification; which are hard to match up using information available for free on the internet.Here's a link to some info on SS348.http://www.matweb.com/search/DataShe...56b41bb&ckck=1"AL 348 is a stabilized stainless steel which offers excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800° to 1500°C. The addition of columbium and tantalum stabilize against chromium carbide formation. For nuclear applications AL 348 has restricted cobalt and tantalum content."Good luck.
Reply:Anything over 12 starts being called "stainless". D2 is 11.5-12 and considered 'semi-stainless".Here's a place to hunt a bithttp://www.engineeringtoolbox.comGo to the various steel manu siteshttp://www.crucible.com/PDFs/MSDS_USCANADA2012.pdfBubble gumTooth pixDuct tapeBlack glueGBMF hammerScrew gun --bad battery (see above)