Test Bodies and Reference Blocks



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Vergleichskörper Nr. 1
Reference Block No. 1


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:

  • te 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 the indication picture of a refernece testing media 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


auf die Merkliste  134.002.002  Reference Block 1  

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Vergleichskörper Nr. 2Vergleichskörper Nr. 2
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Reference Block No. 2


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


auf die Merkliste  134.002.100  Reference Block No. 2 with certificate  

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Berthold Penetrameter
Berthold Penetrameter


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.

Proof of field force

Placing the test body onto a magnetised test specimen, part of the magnetic field lines flow through the soft iron cylinder. After spaying magnetic poweder suspension the one or other gap of the cross slot appears on the foil depending on sufficient magnetisation.

Magnetisation direction

The test bodies is slowly moved around its perpendicular axis until the indication of one of the gaps shows a significant maximum. The evaluated magnetisation direction passes perpendicular to the imaged gap.

Berthold Penetrameter | Test Body

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


auf die Merkliste  134.003.000  Berthold Penetrameter  
auf die Merkliste  134.003.002  Berthold Penetrameter with certificate  

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Magnetfeld Testkörper D 250
Magnetic Field Test Block D250


Octagonal, approx. 3 mm thick test body for 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
27 mm
4 mm
100 mm


auf die Merkliste  134.003.100  Magnetic Field Test Block D250  
auf die Merkliste  134.003.003  Certificate for Magnetic Field Test Block D250  

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Testringe MTP-1
Test rings MTP-1


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


auf die Merkliste  134.004.000  Test ring acc. to ASTM E 1444-01  
auf die Merkliste  134.004.100    

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Magnetfeldanzeiger Magnetfeldanzeiger
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Magnetic Field Indicator


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.


auf die Merkliste  134.002.110  Burmah-Castrol Type I  
auf die Merkliste  134.002.120  Burmah-Castrol Type II  

Testkörper TB-10Testkörper TB-10
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Test Body TB-10


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


auf die Merkliste  134.002.017  Test body TB-10:   1 set = 1 piece (10 lb, 4.5 kg)
auf die Merkliste  134.002.015  Test body TB-10S-4:  1 set = 4 pieces (40 lb, 18.2 kg)
auf die Merkliste  134.002.016  Test body TB-10S-5:   1 set = 5 pieces (50 lb, 22.7 kg)

Testkörper TB-10-SP
Test Body TB-10-SP


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


auf die Merkliste  134.002.018  Test body TB-10-SP  

Testkörper TB-2
Test Body TB-2

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


auf die Merkliste  134.002.030  Test body TB-2  

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Quantitative Quality Indicators QQI

 

Magnetic field indicator  with artificial defects according to

  • SAE AS5371
  • ASTM E1444/1444M-12
  • ASME V art. 7-764.1.2
QQI KSC 230
KSC-230

Standard design

Technical Data    
Number of indications
Circle diameter
Length of slot
Depth of crack
  1
½"
¼"
0.006" (15 µm; 30% of sheet thickness


auf die Merkliste  134.002.401  KSC-230  

QQI  KSC 4 230
KSC-4-230

Magnetic field indicator in miniatur design

Technical Data  
Number of indications
Circle diameter
Length of slot
Depth of crack
4
¼"
¼"
0.006" (15 µm; 30% of sheet thickness


auf die Merkliste  134.002.403  KSC-4-230  

QQI KSCT 234
KSCT-234

Different circle diameters and crack depths

Technical Data    

Number of indications
Circle Diameter

 

3
1/2"
3/8"
1/4"

Depth of crack

  0.004"  (10 µm; 20% of sheet thickness)
0.006"  (15 µm; 30% of sheet thickness)
0.008"  (20 µm; 40% of sheet thickness)


auf die Merkliste  134.002.402  KSCT-234  

QQI KSC 4 234
KSC-4-234

Different crack depths

Technical Data  
Number of indications
Depth of crack
3 concentric circular cracks
20% of sheet thickness
30% of sheet thickness
40% of sheet thickness


auf die Merkliste  134.002.405  KSC-4-234  

QQI KSC 430
KSC-430

  • Standard design
  • Circular and crosswise arrangement of cracks
  • Suitable for logitudinal and circular fields
Technical Data        
Depth of crack 0.004"  (30% of sheet thickness)


auf die Merkliste  134.002.404  KSC-430  

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