The Performance Demonstration Initiative (PDI) Procedure Nos. PDI-UT-1, Rev. C, Fig. 4 (Ferritic), and PDI-UT-2, Rev. C, Fig. 4 are followed in the fabrication of PDI Alternative ASME blocks (Austenitic). These cover the standard techniques for ultrasonically inspecting pipe welds made of ferritic and austenitic metal. The blocks provide a cost-effective substitute for constructing several curved calibration blocks (pipe sections) in various diameters and wall thicknesses.