Verification of   sensitivity of indications  of magnetic powder suspensions.

The reference block consists of  a disc with a bore hole and two types of natural cracks:

• rough grinding cracks
• fine stress corrosion cracks

The reference block was permantently magnetised by a central conductor through the bore hole .

The evaluation of magnetic powder suspensions is performed by visual or metrological comparison of the indications with a reference picture  which was produced under same testing conditions.

Reference Block 1 | acc. to EN ISO 9934-2

Technical Data
Diameter Height Crack width	50 mm 10 mm 2 - 10 µm

  134.002.002  Reference Block 1  

Control and surveillance of sensitivity of indications of magnetic powder suspensions.

The reference block consists of two steel blocks which are precisely ingrainded to each other and which are seperated by an aluminium foil (12 µm thick). At the front sides a permanent magnet is fixed which produces a magnetic flux leakage which decreases with increasing distance.

While spaying the reference block with magnetic powder suspension indications are produced which are stronger towards the ends and decreasing to the centre. The length of the indications are a measure for the suitability of the magnetic powder suspension under testing. The sum of lengths of the left and the right indications are evaluated.

Reference Block 2 | acc. to EN ISO 9934-2

Technical Data
Tangential field force perpendicular to the artificial crack at the marking +4 / -4		+100 / -100 A/m
Dimensions		155 x 40 x 12 mm

Scope of delivery
Reference block with certificate acc. to EN ISO 9934-2

  134.002.100  Reference Block 2 with certificate  

Proof of sufficient  field force  and magnetisation direction.

A soft iron cylinder is seperated into four sectors by a gap of approx. 0.15 mm width, so that - looking from above - a cross slot appears.  The upper side of the cylinder is equipped with a thin non-ferromagnetic metall foil.

Berthold Penetrameter | Test Body

Technical Data
Diameter Height Width of cracks	20 mm 5 mm 95 mm

  134.003.000  Berthold Penetrameter  

  134.003.002  Berthold Penetrameter with certificate  

Octagonal, approx. 3 mm thick test body for

• localisation of magnetic fields
• prooving  magnetisation direction.

The test body consists of eight soft iron segments. The gap between them has a width of max. 0.79 mm (1/32“) and is filled with hard solder. One side of the test body is equipped with a cupper plating.  From above the connecting joints create two crosses which are shifted by 45°.

The reference block is produced in compliance with the following specifications:

• MIL-STD-271 E  (§ 4.3.2.5.5, figure 8) 
• NAVSHIPS 250-1500-1 (§ 12.4.1.5, figure 12 – 17)
• ASME Section V (art. 25, SA-275, figure 8)

D 250 | ASME Indicator

Technical Data
Diameter Height Width of cracks Weight	27 mm 4 mm 100 mm 42 g

  134.003.100  Magnetic Field Test Block D250  

  134.003.003  Certificate for Magnetic Field Test Block D250  

Indication of  sensitivity and performance  of testing systems (dry, wett, fluorescent and non-fluorescent) during application of central conductor.

In order to test the complete MT procedure efficiency, the magnetising direct current has to be passed through the center of the ring via a central conductor to generate the leakage fields above the holes. The field strength decreases along with increasing distance to the ring edge. When the magnetic suspension is applied on the ring, magnetic powder accumulates on the ring edge over the holes, forming indication lines.

The process corresponding to the recovery of a recommended number of holes is accepted as optimal.

MTP-1 | Ketos Tool Steel Ring

Technical Data
Material Hardness Diameter central bore hole Diameter of bore hole	AISI 01 (remunerated round steel) 90 - 95 HRB 31.75 mm 1.78 mm

Central conductor

Length              406.4 mm
Diameter           25.4 - 31.75 mm

  134.004.000  Test ring acc. to ASTM E 1444-01  

  134.004.100    

Thin, flexible test strips to indicate the presence of  induced  magnetic fields.  Both types consist of three laminations of 50 x 12 mm which are fixed together to form a sandwich structure which is nominally 0.15 mm thick. The outer lamination has 3 interruptions which are parallel to the long side.

Burmah-Castrol

• Type I indicators are typically used for general engineering applications
• Type II are used for aerospace applications
• Type I indicators respond to a weaker field than type II strips
• Both types are protected by a polymer layer and can be differentiated by Roman numbers.

  134.002.110  Burmah-Castrol Type I  

  134.002.120  Burmah-Castrol Type II  

Test body for testing and calibration of the lifting force  of AC, DC and permanent magnets:

Each block is stamped which allows traceability to the NIST Standard.

This test body complies with following specifications:

• ASME Section V, Article 7
• ASTM E709
• ASTM E1444
• MIL-Std. 271 E and F
• NAVSEA-TB-T9074-AS-GIBO 10/271

Scope of delivery

• Test body
• Certificate

Series TB-10 | Test body for checking the lifting force

  134.002.017  Test body TB-10:   1 set = 1 piece (10 lb, 4.5 kg)

  134.002.015  Test body TB-10S-4:  1 set = 4 pieces (40 lb, 18.2 kg)

  134.002.016  Test body TB-10S-5:   1 set = 5 pieces (50 lb, 22.7 kg)

Testing of  pull-off force  of AC magnets

• Test body is stamped and verifable by NIST
• Equipped with artificial indications at the backside

The test body complies with the following specifications:

• ASME Section V, Article 7
• ASTM E709
• ASTM E1444
• MIL-Std. 271 E and F
• NAVSEA-TB-T9074-AS-GIBO 10/271

Weight: 10 lb (4,5369 kg)

TB-10-SP | Test body for checking the lifting force

  134.002.018  Test body TB-10-SP  

Test body for testing and calibration of the lifting force  of AC, DC and permanent magnets.

This test body complies with EN ISO 9934-3.

Test Body TB-2 | Test body for checking the lifting force

Scope of delivery

• Test body
• Certificate

  134.002.030  Test body TB-2  

Magnetic field indicator  with artificial defects according to

• SAE AS5371
• ASTM E1444/1444M-12
• ASME V art. 7-764.1.2