Magnaflux Magnetic Particle Test Bar
The Magnaflux Magnetic Particle Test Bar is used as a test piece with artificial flaws, to establish field direction and determine adequate current levels using AC or DC currents in wet horizontal magnetic particle bench units. The bar contains both fine and coarse defects, surface and subsurface defects and longitudinal and transverse indications.
As required in some specifications, this bar may be used to determine that the MPI procedure has the ability to detect a 1/16" x 0.006" x 0.01" (LxWxD) notch (maximum dimension) oriented 90° to the magnetic flux. It is made of low alloy steel and is filled flush with a non-conducting material to prevent mechanical holding of the magnetic particles.
Place bar in wet horizontal unit between head and tailstock. Orient the test bar so that Magnaflux logo faces the operator. Using the table below, apply the proper current and bath to find indications.
|Current & Bath Selection |
|Direction ||Magnetization of Bar ||Surface Cracks ||Sub-Surface Cracks ||Min. Current Needed to Find Indication |
|Longitudinal ||Pass current through the bar (Contact Shot) ||AC Current ||DC Current ||AC 160 / DC 400 amps |
|Transverse ||Place bar in coil (Lengthwise) ||AC Current ||DC Current ||AC 450 / DC 780-890 amps |
Meets or exceeds most industrial and military standards for artificial test specimens.
Can be used for system performance test similar to AS5282 ring.
ASTM E 709-08 (Section 20.8.1)
ASTM E 1444 (Section 7.1.2)
Dimensions: 10" x 1.25" x 3/8" (approx. 254mm x 31mm x 10mm)
Weight: 5 lbs.
Magnaflux Part # - MT-MX-189838
MX Industrial (equivalent to Magnaflux's MPI Test Bar) Part # - MT-MXI-MX3508