Dear All

When conducting welder performance testing, the welder deposits an overlay of 300-series stainless (F5) of a given thickness (t1) on a
test coupon (assume P-No.1). He then applies a second overlay of
E-NiCrFe-3 (F-4X) of a given thickness (t2) on top of the first
overlay, using qualified weld procedures within their thickness
ranges. Will the successful testing of this coupon simultaneously
qualify the welder for depositing both of the overlay processes
described?

Please advice

Ikram

Ikram,

I think that is ok, please refer to the QW-306.

"QW-306 Combination of Welding Processes
Each welder or welding operator shall be qualified within
the limits given in QW-301 for the specific welding process(
es) he will be required to use in production welding.
A welder or welding operator may be qualified by making
tests with each individual welding process in separate test
coupons, or with a combination of welding processes in a
single test coupon. Two or more welders or welding operators,
each using the same or a different welding process,
may be qualified in combination in a single test coupon.
For combination qualifications in a single test coupon, the
limits for thicknesses of deposited weld metal, and bend
and fillet testing are given in QW-452 and shall be considered
individually for each welder or welding operator for
each welding process or whenever there is a change in an
essential variable. A welder or welding operator qualified
in combination on a single test coupon is qualified to weld
in production using any of his processes individually or in
different combinations, provided he welds within his limits
of qualification with each specific process."

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