[MW:11631] RE: 11627] preheating of austenitic ss

Dear Sir,

Because of the austenitic microstructure there is no risk for hardened
structures which can cause cold cracks. Therefore it's not necessary.
Preheating can also cause problems in case it is applied by way of gas
burner. Poorly adjusted burners can cause carbon pick-up which due to
welding may result in Chromium Carbides and structure therefore will be
sensitive to Intergranular Corrosion. Normally you use preheating of
Austenitic Stainless Steel (up to max. 75 °C) only for large wall thickness
and / or to remove moisture present on the surface before welding.

Met vriendelijke groeten / Best Regards

Herman Pieper

Pieper Quality Support & Inspection
Phone: +31 (0)521 380083
Fax: +31 (0)84 7539225
Cell: +31 (0)6 51691215
www.pieper-qsi.nl

-----Oorspronkelijk bericht-----
Van: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] Namens khatri ankit
Verzonden: vrijdag 8 juli 2011 10:28
Aan: Materials & Welding
Onderwerp: [MW:11627] preheating of austenitic ss

Dear Experts,

i want to know the technical reason that "why preheat is not required
in Austenitic SS"

what will the effects of that?

plz clarify me the reason.

Thanks and regards,

Ankit Khatri

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to
materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at
http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and
meant for educational purposes only, Users must take their own decisions
w.r.t. applicable code/standard/contract documents.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.