scope:

This standard specifies how a preliminary welding procedure specification for overlay welding is qualified by welding procedure tests. This standard defines the conditions for execution of welding procedure tests and the range of qualification for welding procedures for all practical welding operations within the range of variables listed in Clause 8. Additional tests may be required by application standards. This standard applies to all welding processes suitable for overlay welding. Building up and repair of parent materials is covered by ISO 15613 or ISO 15614-1. This part of ISO 15614 is applicable to all new welding procedures. However, it does not invalidate previous welding procedure tests made to former national standards or specifications. Where additional tests have to be carried out to make the qualification technically equivalent, it is only necessary to do the additional tests on a test piece made in accordance with this part of ISO 15614. If buttering is used for welding between dissimilar materials, the welding procedure shall be qualified in accordance with ISO 15614-1. This buttering may be required for weld combining different material structure or properties, e. g. joining martensitic steels or ferritic steels with austenitic steels.