CEMP-E
TI 809-26
1 March 2000
if slightly below the surface. Rounded discontinuities such as porosity do not disturb the magnetic flux
lines sufficiently to be effectively detected. See Table D-3.
Table D-3. Magnetic Particle Testing
Most Applicable
Applicable
Least Applicable
Longitudinal Cracks
Microcracks
D
Transverse Cracks
Uniform Porosity
i
Radiating Cracks
Linear Porosity
s
Crater Cracks
Elongated Cavity
c
Group Discontinuous Cracks
"Worm Hole"
o
Branching Cracks
Burn-Through
n
Surface Pore
Miscellaneous Surface
t
Shrinkage Cavity
Discontinuities
i
Crater Pipe
(Spatter, etc.)
n
Incomplete Fusion
u
(Sidewall or Interpass)
i
Incomplete Fusion (Root)
t
Incomplete Penetration
y
Undercut
Overlap
Lap, < 6 mm (< 0.2 in.)
Lap, 6-15 mm (0.2 - 0.6 in.)
Lap, 16 - 50 mm (0.6 - 2 in.)
Joint
Both-Side Access
Lap, > 50 mm (> 2 in.)
Double-V Groove
One-Side Only Access
Single-V Groove
D-6
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