Cool is key for Charpy
We had a similar problem trying to get
approved for the New York State Steel
Construction Manual (NYSSCM).
The interpass suggestions that Jerry
Mathison and Jay Ginder gave were
among the adjustments we had during the process [“Figuring out FCAW
Charpy V-notch failure,” November/
December 2011, p. 28].
Also, we had the plate fully dogged
down and were told that this was not
a good setup. The solution was absolutely mind-boggling: slow cooling! We
wrapped the plate in a cooling blanket
overnight, which allowed for slow cooling that gave us results as high as 24 ft.-lbs. at - 20 degrees.
QC-1 AWS CWI
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