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Up Topic Welding Industry / Technical Discussions / 1.25Cr & 2.5Cr without backing gas
- - By - Date 06-21-2000 12:00
Hello,

Does anyone has any technical information about GTA-welding 1.25Cr-0.5Mo and 2.5Cr-1Mo without the use of backing gas.
I'm specially interested in any material degradation (if any) and / or welding problems.

Thanks in advance

Bert.

Parent - By - Date 07-01-2000 01:44
I have welded these materials for years with an open butt TIG root pass. These welds were performed in boiler applications and never failed in 26+ years of service.
Parent - By Neal (*) Date 07-03-2000 18:53
Same comments as Butch. Surveyed numerous nukes about this and found that it is not a common practice even there.
Up Topic Welding Industry / Technical Discussions / 1.25Cr & 2.5Cr without backing gas

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