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[MW:27554] Re: If a welder is qualified with SS (Stainless Steel) GTAW, He can weld CS Carbon steel GTAW?

By Materials & Welding

As Mr. Chandra is clearly said the welder can't weld in CS as code very clear on this and very nicely explained by Chandra Ji. which is copied below. 

Dear Team,
 Both the carbon and stainless steel filler metals 
Fno. is 6.
Refer QW-404.15 (A change from one F-no in table
Qw-432 to any F-number or to any other filler
metal, except as permitted in Qw-433.
Qw-433 table says qualified with any F.no6 qualified 
For all F-No 6 [refer note1]
Note1 says: deposited wels metal made using a 
bare rod not covered by an SFA specification
but which conforms to an analysis listed in 
Table QW-442 shall be considered to be classified
As F-no 6.

Means carbon steel F.No 6 (but A.No is 1)
 Stainless steel F.No 6 (but A.No is 8)

So, even F.no same but weld metal analysis is
different. So he was not qualified to weld stainless

Best Regards,
Chandra



On Saturday, February 24, 2018 at 1:03:47 PM UTC+3, PK wrote:
Dear Sir,

If a welder is qualified with SS (Stainless Steel) GTAW,  He can weld CS Carbon steel GTAW? Need code Referance...

Thanks.
PKM

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