5 step UT test block 1018 steel nickel plated 0.1, 0.2, 0.3, 0.4,.05 Inch per ASTM E797
material: 1018 steel nickel plated
thickness:0.1, 0.2, 0.3, 0.4,0.5 Inch
pad size: 0.75X.75 inch
standard:per ASTM E797