not come in contact with molten Chromium as SS is having Cr and during
welding if it is coming in contact with oxygen it will become chromium oxide
and the same is very brittle and lead to weld crack.
With kind regards,
Vinod Kumar Kataria
GM - Operations
Bliss Anand Private Limited,
92B/93B Sector 5
IMT Manesar,Gurgaon,
National Capital Region Delhi.
India .
Phone : +91-124-4366000 (9 Lines)
Mobile Phone : +91-9560199004
Fax : +91-124-2290884
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Srinivas Engr
Sent: Thursday, February 10, 2011 12:03 PM
To: Materials & Welding
Subject: [MW:9798] Backing by gas/Back purging is not essential for P.No 8 -
Austentic stainless steel? - ASME Sec 9
Dear All,
As per QW 256, GTAW process,
QW 408 Gas, There is no essential variable for gas Backing for P.No.
-8. Austentic Stainless Steel. A312 & others.
So we can qualify WPS without gas backing/Bsckpurging.
Am i right or not?
Pl clear me
Regards
Srinivas
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