ASME IX Weld Overlay Procedure

Weld Overlay also known as cladding, hard-facing, weld cladding, or weld overlay cladding, is a process where one or more metals are joined together via welding to the surface of a base metal as a layer.

This is normally done to improve the material by adding either a corrosion resistant or hard-facing layer to it.

Surfaces prepared in this way can even be highly customized by layering and alloying multiple different materials together.

Hard-Facing Weld Metal Overlay Procedure (ASME BPVC Section IX)

This example to base metal AISI 4130/4140/4145 (tool joint)

  1. Test coupon and limits of qualification as specified in table QW-453.
  2. Welding variables as specified in QW-250 for the application process.

Test coupon:

  1. T thickness recommends 25 mm,

Test required are given in table QW-453, note-3, 7, 8, 9.

  1. Liquid penetrant examination as specified in QW-195.2.
  2. Hardness survey, as specified in Figure QW-462.5,
  3. Visual examination, as note-8 in table QW-453,
  4. Chemical analysis (if required), as specified in Figure QW-462.5,

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Nguyen Duy Bien
 

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