Magnetic Particle Testing
- Overview
- Aerosol detection media
- Coloured detection media
- Fluorescent detection media
- Background colour
- Cleaner
- Test oils and conditioning agents
- Test bodies and reference blocks
- Test kit and accessories
- Hand yoke magnets
- Accessories for hand yoke magnets
- Permanent magnets
- Mobile equipment
- High current generator / accessories
- Magnetising coils
- MT test facilities
- UV LED lamps
- UV(A) protective goggles
HELLING GmbH
Since 1863
Magnetic particle testing
Magnetic Particle Testing
Magnetic particle inspection is a simple but sensitive method for detecting irregularities in the surface of ferromagnetic materials with a relative permeability µr >100, e.g. steel, cast iron, cobalt, nickel. Inhomogeneities close to the surface can also be detected. The depth of detectable indications depends on the field used:
- Alternating field max. 1 mm - 2 mm
- DC field max. 2 mm - 3 mm
Surface crack inspection with the fluorescent magnetic particle testing - the crack indication is clearly visible under UV irradiation
Weld seam testing with the magnetic particle testing with coloured (here black) suspension and white background colour (black-white method)
During magnetisation of the ferromagnetic material, leak fluxes occur over material separations (e.g. cracks, pores). The detection can be performed
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HELLING offers various detection media (fluorescent or coloured) in the form of
- Dry powder
- Liquid water-based concentrate
- Ready-to-use oil-based suspension
MT detection media for magnetic particle testing (aerosols) - fluorescent or coloured suspensions based on water or oil
White background colour to improve contrast and cleaner for pre- and final cleaning
HELLING develops test facilities like
- Hand yoke magnets
- Cross yokes
- Permanent magnets
to generate the magnetic field. These are manufactured at HELLING and can thus be optimally adapted to the customer's test conditions.
Hand-held yoke magnet for magnetisation, e.g. for non-destructive testing of a weld seam with magnetic particle testing
Test bodies and reference blocks according to international standards enable the detection media to be checked in accordance with the standards.
Reference blocks for magnetic particle testing to check the indication sensitivity of the detection media (magnetic particle suspension)
Furthermore, HELLING manufactures fully equipped testing systems for magnetic particle testing according to customer-specific requirements. This includes for example
- Crack testing benches of different sizes
- Railway wheelset testing facilities
- Test tables for testing cylindrical, rectangular or irregularly shaped test specimens
- Test benches for serial testing
- Test benches for training purposes
Wheelset testing system ROD-A-MAT for combined testing of wheelset axle and wheelset wheels with fluorescent magnetic particle testing
Aerosol detection media
Test equipment in spray cans is mainly used for quick and efficient testing in mobile applications.
The aerosol suspensions - both oil-based and water-based - are characterised by high sensitivity. They therefore allow the detection of the finest cracks.
Weld seam testing with black magnetic powder suspension BW 333 and white background colour NR 104 A spray
The low consumption and the handiness of the aerosol can make them ideal for use on construction sites or for quick testing of individual test parts.
Aerosol test equipment from Helling meets the requirements of
- ASME Code Section V
- ASTM E709
- DIN EN ISO 9934
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BW 333Water-based magnetic particle suspension
Packaging: Aerosol can - 400 mL |
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NRF 101Oil-based magnetic particle suspension
Packaging: Aerosol can - 400 mL ⋅ Canister - 1 L ⋅ Canister - 10 L |
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NRS 103Oil-based magnetic particle suspension
Packaging: Aerosol can - 400 mL ⋅ Canister - 1 L ⋅ Canister - 10 L ⋅ Barrel - 200 L |
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NRS 103 SOil-based magnetic particle suspension
Packaging: Aerosol can - 400 mL |
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LY 2500Water-based magnetic particle suspension
Packaging: Aerosol can - 400 mL |
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Magnetpulver-Trocken-Spray fluoreszierendFluorescent magnetic powder without carrier liquid (dry spray)
Packaging: Aerosol can - 400 mL |
Coloured detection media
In addition to fluorescent detction media, the Helling GmbH product range includes a diverse range of coloured test products in the form of
- Dry powders
- Concentrates
- Ready-to-use suspensions
The coloured magnetic powders are characterised by their
- brilliant colour
- defined particle size distribution
- High purity
They produce easily recognisable indications on both dark and blank, bright surfaces.
The water-suspended and dry magnetic powder concentrates for the preparation of ready-to-use water-based suspensions already contain
- Rust inhibitor
- Wetting agent
- Defoamer
They are therefore also used for testing corrosion-sensitive parts.
The use of concentrates contributes significantly to the reduction of transport and storage costs.
Ready-to-use oil-based suspensions are ideal for use on construction sites or for manual testing of individual test parts. The test oils to be used are colourless, odourless and skin-compatible. They have a low viscosity. As a result, the finished suspensions have only short dripping times.
The product range also includes ready-to-use suspensions in spray cans for fast, efficient testing in mobile applications.
Helling test products meet the requirements of
- ASME Code Section V
- ASTM E709
- DIN EN ISO 9934
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BW 333
Delivery as
1. Pure magnetic powder
2. Liquid water-based concentrate and dry concentrate
The concentrates contain wetting agent, defoamer (non-silicone), corrosion protection agent. They are halogen-free. Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1.5 kg ⋅ Liquid concentrate (water-based) - 1 L ⋅ Suspension oil-based - 1 L ⋅ Suspension oil-based - 10 L |
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Super Magna MEF-515 rot
Delivery as
1. Pure magnetic powder
2. Liquid water-based concentrate and dry concentrate
The concentrates contain wetting agent, defoamer (non-silicone), corrosion protection agent. They are halogen-free. Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1.5 kg ⋅ Liquid concentrate (water-based) - 1 L ⋅ Suspension oil-based - 1 L |
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Super Magna TGL-11
Delivery as
1. Pure magnetic powder
2. Dry concentrate
Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1.5 kg |
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Super Magna TGL-12
Delivery as
1. Pure magnetic powder
2. Dry concentrate
Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1.5 kg |
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Super Magna WD-105
Delivery as
1. Pure magnetic powder
2. Dry concentrate
Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1.5 kg |
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Super Magna WW 50
Delivery as
1. Pure magnetic powder
2. Dry concentrate
Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1.5 kg |
Fluorescent detection media
For the performance of magnetic particle testing under UV-A irradiation Helling GmbH offers a range of fluorescent detection products in the form of
- Dry powders
- Concentrates
- Ready-to-use suspensions
The fluorescent magnetic powders are characterised by
- High fluorescence coefficient
- Defined particle size distribution
- Hhigh purity
They produce indications that are easily recognisable under UV irradiation. The finest cracks are detectable.
The water-suspended and dry magnetic powder concentrates for the preparation of ready-to-use water-based suspensions already contain
- Rust inhibitor
- Wetting agent
- Defoamer
They can also be used for test objects that are sensitive to corrosion.
The use of concentrates contributes significantly to the reduction of transport and storage costs.
Ready-to-use oil-based suspensions are ideal for use on construction sites or for manual testing of individual test parts. The test oils to be used are colourless, odourless and skin-compatible. They have a low viscosity. As a result, the finished suspensions have only short dripping times. Because the test oils do not exhibit any inherent fluorescence, high-contrast, brilliant crack indications are produced.
The product range also includes ready-to-use suspensions in spray cans for fast, efficient testing in mobile applications.
Helling test products meet the requirements of
- ASME Code Section V
- ASTM E709
- DIN EN ISO 9934
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Super Magna LY 1500Yellow-green fluorescent
Delivery as
1. Pure magnetic powder
2. Liquid water-based concentrate and dry concentrate
Contains wetting agent, defoamer (non-silicone), corrosion protection agent. Halogen-free. Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1 kg ⋅ Liquid concentrate (water-based) - 5 L ⋅ Suspension oil-based - 1 L ⋅ Suspension oil-based - 10 L |
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Super Magna LY 2300Yellow-green fluorescent
Delivery as
1. Pure magnetic powder
2. Liquid water-based concentrate
Contains wetting agent, defoamer (non-silicone), corrosion protection agent. Halogen-free. Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1 kg ⋅ Liquid concentrate (water-based) - 5 L ⋅ Suspension oil-based - 1 L ⋅ Suspension oil-based - 10 L |
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Super Magna LY 2500Yellow-green fluorescent
Delivery as
1. Pure magnetic powder
2. Liquid water-based concentrate
Contains wetting agent, defoamer (non-silicone), corrosion protection agent. Halogen-free. Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1 kg ⋅ Liquid concentrate (water-based) - 1 L ⋅ Liquid concentrate (water-based) - 5 L ⋅ Concentrate oil-based - 10 L ⋅ Suspension oil-based - 1 L ⋅ Suspension oil-based - 10 L ⋅ Special High-Temp - 1 L ⋅ Special High-Temp - 10 L |
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Super Magna CGY 4000Yellow-green fluorescent
Delivery as
1. Pure magnetic powder
2. Liquid water-based concentrate and dry concentrate
Contains wetting agent, defoamer (non-silicone), corrosion protection agent. Halogen-free. Packaging: Pure magnetic powder - 1 kg ⋅ Dry concentrate - 1 kg ⋅ Liquid concentrate (water-based) - 1 L ⋅ Suspension oil-based - 1 L ⋅ Suspension oil-based - 10 L |
Background colour
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Untergrundfarbe weiß Nr. 104 A
Packaging: Aerosol can - 400 mL ⋅ Canister - 1 L ⋅ Canister - 10 L ⋅ Barrel - 200 L |
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Untergrundfarbe 104 A/S Spray
Packaging: Aerosol can - 400 mL |
Cleaner
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Cleaner No. 107Cleaner to remove the white background colour Packaging: Aerosol can - 400 mL ⋅ Canister - 1 L ⋅ Canister - 10 L ⋅ Barrel - 200 L |
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Universal-EntfetterUniversal cleaner for cleaning oil and grease contaminated metallic surfaces in surface crack testing. Also suitable for cleaning disc and drum brakes (automotive industry). Packaging: Aerosol can - 750 mL ⋅ Canister - 1 L ⋅ Canister - 10 L ⋅ Barrel - 200 L |
Test oils and conditioning agents
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Crack detection oil Typ 01500Test oil for the preparation of suspensions in magnetic particle testing
Packaging: Canister - 10 L ⋅ Barrel - 200 L |
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Crack detection oil Typ 4965Test oil for the preparation of magnetic particle suspensions in magnetic particle testing
Packaging: Canister - 10 L ⋅ Canister - 25 L ⋅ Barrel - 200 L |
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Additiv BC 502Relaxation foam, antifoam agent and temporary corrosion inhibitor for preparation of water-based magnetic particle suspensions. Additiv BC 502 is a compound of polyethylenglycolether, sodium palmitate, polysiloxane, phosphate, water and amine borate. 20 mL - 50 mL to 1 L water-based magnetic particle suspension Packaging: Canister - 1 L ⋅ Canister - 10 L ⋅ Canister - 25 L |
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Antirust RS 602Antirust for the production of water-based magnetic particle suspensions. Free from nitrates, chlorides and halogens. Also applicable for water-based coolants, cleaning liquids and metalworking fluids. Dosage 20 mL to 1 L water or water-based magnetic particle suspension Packaging: Canister - 1 L ⋅ Canister - 10 L |
Test bodies and reference blocks
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Reference block 1Reference block 1 according to EN ISO 9934-2 for demonstrating the indication sensitivity of magnetic powder suspensions. The reference block consists of a disc with a bore hole and two types of natural cracks:
The reference body is permanently magnetised with a central conductor through the hole. The evaluation of magnetic particle suspensions is performed by visual or metrological comparison of the indications with a reference image which was produced under same testing conditions. Technical data
Scope of delivery Reference block 1 according to DIN EN ISO 9934-2 (without certificate) OPTIONAL
Version: Without certificate ⋅ With certificate ⋅ Control |
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Reference block 2Reference body 2 according to EN ISO 9934-2 for control and monitoring the indication sensitivity of magnetic powder suspensions. Reference block 2 consists of two steel blocks precisely ground into each other and separated by an Al foil (15 µm). There is a permanent magnet on each of the two end faces. This generates a magnetic leakage flux above the interface, which becomes weaker with increasing distance from the magnet. If the comparative body is rinsed with magnetic powder suspension, indications are formed which are more pronounced at the ends and decrease towards the center. The indication lengths are a measure of the suitability of the magnetic powder suspension being controlled. The sum of the lengths of the left and right displays is evaluated. Technical data
Scope of delivery Reference block 2 with certificate acc. to EN ISO 9934-2 OPTIONAL
Version: With certificate ⋅ Calibration of Reference Body 2 |
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MP Universal 900 reference blockDemonstration of the Proof of sensitivity of fluorescent detection media .The MP-Universal-900 reference block is provided with two types of natural cracks:
The reference body is remanently magnetised. The detection medium is evaluated by visual or metrological comparison of the indications. The reference block can be used for
Scope of delivery
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Berthold PenetrameterProof of sufficient field strength and magnetisation direction
A soft iron cylinder divided into four sectors separated by a gap of approx. 0.15 mm width, which - seen from above - reveals a cross slot. The top of the cylinder is covered with a thin, non-ferromagnetic metal foil.
Version: Without certificate ⋅ With certificate ⋅ Control |
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Magnetic field test body D 250Octagonal, approx. 3 mm thick test body according to ASME for the
The test body consists of eight soft iron segments connected by hard solder. The gaps between the segments filled with hard solder have a maximum width of 0.79 mm (1/3 inch). One side of the test body is copper plated. Viewed from above, the connecting seams form two crosses offset by 45°. Manufactured in accordance with the following specifications:
Technical data
Version: Without certificate ⋅ With certificate |
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Magnetic field indicator Burmah-CastrolThin, flexible test strips for magnetic field indication consisting of three different layers, each 0.05 mm thick. The middle layer consists of a nickel-iron alloy with high relative permeability. The outer layers consist of a non-magnetisable material. The middle layer has three slots running parallel to the long side, 42 mm long and evenly distributed across the width. The Burmah-Castrol magnetic field indicator is available in 2 versions: Type I and Type II. Type I differs from Type II as follows:
Version: Burmah-Castrol Type I ⋅ Burmah-Castrol Type II |
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Ketos Tool Steel RingThe Steel Ring is available in the version according to
Proof of sensitivity of detection media systems (dry, wet, fluorescent and non-fluorescent) when using the magnetisation technique with a central conductor. While a direct current (half-wave or full-wave rectification) flows through the central conductor (length >406.4 mm, Ø 25.4 - 31.75 mm), flux leakages are generated above the holes. The field strength decreases with increasing distance to the ring edge. When magnetic particle suspension is applied to the ring, the magnetic particles accumulate at the edge of the ring above the holes and form indication lines. The relative sensitivity of the detection media system is demonstrated by the number of indications. Technical data
Central conductor
Version: According to ASTM E 1444-01 ⋅ According to SAE AS5282 (Aviation / Aerospace) |
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Miniature QQI-Model KSC4-230Quantitative Quality Indicator QQI Magnetic field indicator with artificial defects according to
Miniature magnetic field indicator, similar to KSC-230. The four circular indications can be cut apart for individual use. Technical data
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Standard QQI-Model KSC-230Quantitative Quality Indicator QQI Magnetic field indicator with artificial defects according to
Standard version Circular and crossed bar defects configuration suitable for longitudinal and circular fields Technical data
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Variable depth QQI-Model KSCT-234Quantitative Quality Indicator QQI Magnetic field indicator with artificial defects according to
3 different circle diameters with different crack depths Technical data
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Standard QQI-Model KSC-430Quantitative Quality Indicator QQI
Standard magnetic field indicator with artificial defects according to
Standard design with circular and cross-shaped cracks. Suitable for longitudinal and circular fields Technical data
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QQI-Model KSC-4-234Quantitative Quality Indicator QQI Magnetic field indicator with artificial defects according to
3 circular defects with different diameters and crack depths. Technical data
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Lifting force test body TB-2Test bodies for controlling and calibrating the lifting force of AC, DC and permanent magnets. The test body complies with EN ISO 9934-3. Scope of delivery
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Lifting force test body TB-10Test bodies for controlling and calibrating the lifting force of AC, DC and permanent magnets:
The test body is stamped. This ensures traceability to the NIST standard. The test body complies with the following specifications:
Scope of delivery
Version: 1 set = 1 piece (10 lb, approx. 4.5 kg) ⋅ S-4: 1 set = 4 pieces (40 lb, approx. 18.2 kg) ⋅ S-5: 1 set = 5 pieces (50 lb, approx. 22.7 kg) |
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Lifting force test body TB-10-SPControlling and calibrating the lifting force of AC yoke magnets.
The test body complies with the following specifications:
Weight: 10 lb (4.5369 kg) |
Test kit and accessories
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HELLING MT test kitThe HELLING MT test kit has been specially composed for
The test case is further compiled for NDT test personnel and inspectors. The HELLING MT test kit contains the test equipment, detection media, measuring and auxiliary means necessary for carrying out magnetic particle testing in accordance with the standards. Please refer to the product flyer for the content. |
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Centrifugal tube according to ASTM E709-08The centrifugal tube according to ASTM E709-08 is used to determine the magnetic particle concentration in magnetic particle suspensions. After a settling time of
a prescribed number of graduation marks must be reached. According to ASTM E1444, the settling volume must reach the following values for a suspension volume of 100 mL:
Version: For fluorescent suspensions ⋅ For non-fluorescent suspensions ⋅ For non- and fluorescent suspensions ⋅ Mounting for centrifugal tube |
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Documentation sheetsThe documentation sheet is characterised by
Scope of delivery
Version: 13x18 cm Black ⋅ 13x36 cm Black ⋅ 13x18 cm White ⋅ 13x36 cm White ⋅ 13x18 cm Transparent ⋅ 13x36 cm Transparent |
Hand yoke magnets
Series HANSA is the new generation of hand yoke magnets, which is characterised by several advantages over the previous series: the yokes are
- of lower weight
- handy
- more powerful
An important ergonomic feature of the HANSA series is the narrow handle bar, which allows fatigue-free work - even for small hands - over a long period of time.
The HANSA series consists of the hand yoke magnets
- UM-8
- UM-9
- UM-10
- UM-15
All hand yoke magnets are manufactured at Helling GmbH.
The UM-8, UM-9 and UM-10 hand yoke magnets differ in the following ways
- the dimensions (mean pole spacing and leg length)
- the weight
- the pull-off force
The pole spacing can be changed by attaching attachment poles. The lower leg of the 45° attachment pole can be swiveled inward or outward by 45°, for example. This increases or decreases the pole distance. The 45° bevel of the contact surface of the attachment pole allows optimum adaptation to the respective test object geometry.
Flexible pole 45°
For use in harsh conditions, the hand magnets can be equipped with protective poles.
Hand yoke magnet UM-15 is equipped with three-link movable legs as standard. These can be used to set pole distances (center/center) from 95 mm to 245 mm.
In relation to
- Lifting force
- Tangential field strength
all hand yoke magnets of the HANSA series meet the requirements of the current standards and regulations such as
- EN ISO 9934-3
- ASTM E709
- ASME Code Section V
The hand yoke magnets of the HANSA series are fully potted and thus meet protection class IP 65.
They are available in the following mains voltage versions:
- 230 V
- 110 V
- 42 V (with transformer)
With the exception of UM 8 (60 s, 30% ED), they can be used with a maximum on-time of 150 s and a maximum duty cycle (ED) of 50%.
The power cable can be unscrewed. This prevents malfunctions and costly repairs due to kinked cables directly at the cable entry.
Greater mobility and freedom of movement are provided to the test personnel by the battery-powered and thus network-independent DC hand-held yoke magnets of the HANSA-DC series.
Here, too, a low weight, the narrow handle bar ensure fatigue-free work. The surface of the devices is slightly roughened, which prevents slipping in the hand.
The magnets are powered by a compact NiMH battery of high capacity and long operating time. The battery charge status is indicated by the LED operation indicator integrated in the yoke housing.
The HANSA-DC hand yoke magnets meet the requirements of
- ASTM E709-21
- ASTM E1444/E1444M-21
- 42 V (with transformer)
The pull-off force is >27 kg / >265 N. Thus, the requirement of ASTM E 709-21 (at least 23.0 kg / 225 N) is fulfilled.
OPTIONAL test reports are available for all HANSA manual yoke magnets.
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Safety transformerMobile safety transformer according to VDE 0570 and EN 61558 for hand yoke magnets. Technical data
Version: For UM 8 / UM 9 / UM 15 (HANSA-42) ⋅ For UM 10 (HANSA-42) |
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Hand yoke magnet UM 8 / HANSA-230Technical data
Version: Hand yoke magnet ⋅ Spare cable - length 5 m ⋅ Spare cable - length 10 m ⋅ Test report |
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Hand yoke magnet UM 8 / HANSA-42Technical data
Necessary accessories: Art. no. 131.009.050 - Safety transformer 230/42 V Version: Hand yoke magnet ⋅ Safety transformer ⋅ Spare cable - length 10 m ⋅ Test report |
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Hand yoke magnet UM 9 / HANSA-230Technical data
OPTIONAL
Version: Hand yoke magnet ⋅ Spare cable - length 5 m ⋅ Spare cable - length 10 m ⋅ Test report ⋅ Cable exit top |
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Hand yoke magnet UM 9 / HANSA-42Technical data
Necessary accessories: Art. no. 131.009.050 - Safety transformer 230/42 V OPTIONAL
Version: Hand yoke magnet ⋅ Safety transformer ⋅ Spare cable - length 10 m ⋅ Test report ⋅ Cable exit top |
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Hand yoke magnet UM 9 / HANSA-DCTechnical data
Version: Without status display LED red/green ⋅ With status display LED red/green ⋅ Certificate |
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Hand yoke magnet UM 10 / HANSA-230Technical data
OPTIONAL
Version: Hand yoke magnet ⋅ Spare cable - length 5 m ⋅ Spare cable - length 10 m ⋅ Test report ⋅ Cable exit top |
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Hand yoke magnet UM 10 / HANSA-42Technical data
Necessary accessories: Art. no. 131.009.056 - Safety transformer 230/42 V OPTIONAL
Version: Hand yoke magnet ⋅ Safety transformer ⋅ Spare cable - length 10 m ⋅ Test report ⋅ Cable exit top |
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