Trying to achieve -40 MDMT

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Topic Welding Industry / Metallurgy / Trying to achieve -40 MDMT

By bryancobb Date 07-10-2012 15:24

Hi,

On a GTAW weld procedure, using ER70 S2 filler wire and 100% Argon shield, and joining 4" SCH40 SA-106B Pipe, what can we do in the procedure
to insure the test coupons will pass a Charpy Impact Test at the -40 degF MDMT ?

Will a preheat help? What temp preheat? Is a different filler needed? Is PWHT needed?

By welderbrent (*****)

Date 07-10-2012 18:20

Bryan,

WELCOME TO THE AWS WELDING FORUM!!

Do everyone a favor and DON'T double post a question. Most of us check ALL new threads for interest and knowledge and answer if we can help. Putting it in multiple locations of the forum just confuses things and doesn't allow for a good flow of answers. I believe the other location is probably a little better than this one for your question.

Have a Great Day, Brent

Topic Welding Industry / Metallurgy / Trying to achieve -40 MDMT