S355 ML basically UNASSIGNED Material as per ASME SEC IX,and for WQT as per QW-403.18 A change from one P‐Number to any
other P‐Number or to a base metal not listed in Table
QW/QB-422, except as permitted in QW-423, and in
QW-420.
QW-423 ALTERNATE BASE MATERIALS FOR
WELDER QUALIFICATION
QW-423.1 Base metal used for welder qualification
may be substituted for the metal specified in the WPS in
accordance with the following table. When a base metal
shown in the left column is used for welder qualification,
the welder is qualified to weld all combinations of base
metals shown in the right column, including unassigned
metals of similar chemical composition to these metals.
With Regards
Hasin Shaikh
On Wed, Aug 15, 2018 at 12:16 PM 'Raja kumarasamy' via Materials & Welding <materials-welding@googlegroups.com> wrote:
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Dear sirs,Kindly please advice PQR was carried out with I-beam S355 ML materials. Shall I proceed A-36 materials for WQT…. Is this materials same equivalent material P no's & G-no'sRegardsRaja kumarasamyWelding & Piping inspectorSalalah LPG ProjectOman Gas Company (OGC)Oman Mobile: +968-91983421
https://materials-welding.blogspot.com/
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