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MP 32x16x3 / N38 - ring magnet

ring magnet

Catalog no 030198

GTIN/EAN: 5906301812159

5.00
Load capacity 2.79 kg / 27.40 N Magnetic Induction 114.25 mT / 1142 Gs
Diameter
32 mm [±0,1 mm]
internal diameter Ø
16 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
13.57 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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Frequently asked questions

What is the hole in a ring magnet for?
For mounting on a screw or a shaft. The bore may be cylindrical or countersunk for a screw head. The hole removes magnet volume, so a ring holds less than a disc of the same outside diameter.
What is the polarisation?
Axial as standard — poles on the flat faces of the ring. Diametrical polarisation is made to order.
What sizes are available?
Outside diameter from 5 to 62 mm from stock. To order up to 200 mm outside diameter, 180 mm bore and 40 mm height, with a lead time of 25–35 days.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator
Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical specification of the product - MP 32x16x3 / N38 - ring magnet

Specification / characteristics - MP 32x16x3 / N38 - ring magnet

properties
properties values
Cat. no. 030198
GTIN/EAN 5906301812159
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter 32 mm [±0,1 mm]
internal diameter Ø 16 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 13.57 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.79 kg / 27.40 N
Magnetic Induction ~ ? 114.25 mT / 1142 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 32x16x3 / N38 - ring magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 310 °C
Curie Temperature TF 590 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Technical simulation of the magnet - data

The following data are the result of a mathematical calculation. Results rely on models for the material Nd2Fe14B. Real-world conditions may deviate from the simulation results. Use these data as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - power drop
MP 32x16x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5552 Gs
555.2 mT
 2.79 kg / 6.15 lbs
2790.0 g / 27.4 N
 warning
1 mm 5202 Gs
520.2 mT
 2.45 kg / 5.40 lbs
2448.8 g / 24.0 N
 warning
2 mm 4850 Gs
485.0 mT
 2.13 kg / 4.69 lbs
2128.7 g / 20.9 N
 warning
3 mm 4504 Gs
450.4 mT
 1.84 kg / 4.05 lbs
1836.3 g / 18.0 N
 safe
5 mm 3849 Gs
384.9 mT
 1.34 kg / 2.96 lbs
1340.5 g / 13.2 N
 safe
10 mm 2513 Gs
251.3 mT
 0.57 kg / 1.26 lbs
571.6 g / 5.6 N
 safe
15 mm 1633 Gs
163.3 mT
 0.24 kg / 0.53 lbs
241.2 g / 2.4 N
 safe
20 mm 1087 Gs
108.7 mT
 0.11 kg / 0.24 lbs
107.0 g / 1.0 N
 safe
30 mm 535 Gs
53.5 mT
 0.03 kg / 0.06 lbs
25.9 g / 0.3 N
 safe
50 mm 181 Gs
18.1 mT
 0.00 kg / 0.01 lbs
3.0 g / 0.0 N
 safe
Grip strength drops drastically per each millimeter of distance. Keep in mind that every additional insulation layer (e.g., contamination, paint, dust) significantly reduces the pull force. Neodymiums hold strongest at the point of direct contact; distance nullifies the force. Notice how flashily the parameters fall, when the magnet does not adhere directly to the metal substrate. When planning the assembly, discard additional spacers.

Table 2: Shear hold (wall)
MP 32x16x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.56 kg / 1.23 lbs
558.0 g / 5.5 N
1 mm Stal (~0.2) 0.49 kg / 1.08 lbs
490.0 g / 4.8 N
2 mm Stal (~0.2) 0.43 kg / 0.94 lbs
426.0 g / 4.2 N
3 mm Stal (~0.2) 0.37 kg / 0.81 lbs
368.0 g / 3.6 N
5 mm Stal (~0.2) 0.27 kg / 0.59 lbs
268.0 g / 2.6 N
10 mm Stal (~0.2) 0.11 kg / 0.25 lbs
114.0 g / 1.1 N
15 mm Stal (~0.2) 0.05 kg / 0.11 lbs
48.0 g / 0.5 N
20 mm Stal (~0.2) 0.02 kg / 0.05 lbs
22.0 g / 0.2 N
30 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
The following data presents the approximate force necessary to cause the slippage of the magnet down along a vertical steel plate (assuming typical friction coefficient). This parameter is a function of the distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 32x16x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.84 kg / 1.85 lbs
837.0 g / 8.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.56 kg / 1.23 lbs
558.0 g / 5.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.28 kg / 0.62 lbs
279.0 g / 2.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.40 kg / 3.08 lbs
1395.0 g / 13.7 N
When mounting a element on a vertical surface (e.g., a fridge), it you can count on just approx. 20%-30% of its nominal power. Gravitational force as well as a weak degree of grip mean that magnets move down easier than they pull off. Designing a wall mount? Note that the shear force is significantly lower than the perpendicular breakaway force. On a painted metal, the magnet will give way down under a noticeably lighter weight. Application of an anti-slip pad can drastically raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MP 32x16x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.28 kg / 0.62 lbs
279.0 g / 2.7 N
1 mm
25%
 0.70 kg / 1.54 lbs
697.5 g / 6.8 N
2 mm
50%
 1.40 kg / 3.08 lbs
1395.0 g / 13.7 N
3 mm
75%
 2.09 kg / 4.61 lbs
2092.5 g / 20.5 N
5 mm
100%
 2.79 kg / 6.15 lbs
2790.0 g / 27.4 N
10 mm
100%
 2.79 kg / 6.15 lbs
2790.0 g / 27.4 N
11 mm
100%
 2.79 kg / 6.15 lbs
2790.0 g / 27.4 N
12 mm
100%
 2.79 kg / 6.15 lbs
2790.0 g / 27.4 N
A thin sheet is not enough to absorb the full magnetic flux, which weakens actual performance of the holder. Should you install a neodymium to a thin surface, the flux will penetrate right through and the holding will be smaller. To squeeze 100% of this magnet's potential, you require a sufficiently solid piece of steel. The material oversaturation causes that on sheet metal structures (e.g., car bodies), the holder shows lower pull force. We recommend selecting the steel cross-section from these parameters.

Table 5: Working in heat (stability) - thermal limit
MP 32x16x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.79 kg / 6.15 lbs
2790.0 g / 27.4 N
 OK
40 °C -2.2% 2.73 kg / 6.02 lbs
2728.6 g / 26.8 N
 OK
60 °C -4.4% 2.67 kg / 5.88 lbs
2667.2 g / 26.2 N
 OK
80 °C -6.6% 2.61 kg / 5.74 lbs
2605.9 g / 25.6 N
100 °C -28.8% 1.99 kg / 4.38 lbs
1986.5 g / 19.5 N
Classic neodymiums lose power past the thermal threshold. Watch out for overheating – heat can irreversibly destroy this magnet. With every degree above norm, the neodymium's power momentarily drops. Do not use this magnet in hot environments higher than its operating temperature limit. Ignoring the limit will result in permanent loss of magnetic properties.
*Technical advisory: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures than long magnets. Warning indicator in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MP 32x16x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 128.78 kg / 283.90 lbs
6 014 Gs
19.32 kg / 42.59 lbs
19317 g / 189.5 N
 N/A
1 mm 120.86 kg / 266.44 lbs
10 757 Gs
18.13 kg / 39.97 lbs
18128 g / 177.8 N
 108.77 kg / 239.80 lbs
~0 Gs
2 mm 113.03 kg / 249.19 lbs
10 403 Gs
16.95 kg / 37.38 lbs
16954 g / 166.3 N
 101.73 kg / 224.27 lbs
~0 Gs
3 mm 105.49 kg / 232.56 lbs
10 050 Gs
15.82 kg / 34.88 lbs
15823 g / 155.2 N
 94.94 kg / 209.31 lbs
~0 Gs
5 mm 91.34 kg / 201.37 lbs
9 352 Gs
13.70 kg / 30.21 lbs
13701 g / 134.4 N
 82.21 kg / 181.23 lbs
~0 Gs
10 mm 61.88 kg / 136.41 lbs
7 697 Gs
9.28 kg / 20.46 lbs
9281 g / 91.0 N
 55.69 kg / 122.77 lbs
~0 Gs
20 mm 26.38 kg / 58.16 lbs
5 026 Gs
3.96 kg / 8.72 lbs
3957 g / 38.8 N
 23.74 kg / 52.35 lbs
~0 Gs
50 mm 2.35 kg / 5.17 lbs
1 499 Gs
0.35 kg / 0.78 lbs
352 g / 3.5 N
 2.11 kg / 4.66 lbs
~0 Gs
60 mm 1.19 kg / 2.63 lbs
1 069 Gs
0.18 kg / 0.39 lbs
179 g / 1.8 N
 1.07 kg / 2.37 lbs
~0 Gs
70 mm 0.65 kg / 1.42 lbs
786 Gs
0.10 kg / 0.21 lbs
97 g / 1.0 N
 0.58 kg / 1.28 lbs
~0 Gs
80 mm 0.37 kg / 0.81 lbs
594 Gs
0.06 kg / 0.12 lbs
55 g / 0.5 N
 0.33 kg / 0.73 lbs
~0 Gs
90 mm 0.22 kg / 0.49 lbs
459 Gs
0.03 kg / 0.07 lbs
33 g / 0.3 N
 0.20 kg / 0.44 lbs
~0 Gs
100 mm 0.14 kg / 0.30 lbs
362 Gs
0.02 kg / 0.05 lbs
21 g / 0.2 N
 0.12 kg / 0.27 lbs
~0 Gs
Two strong neodymiums attract each other from a wider radius than a neodymium and metal setup. Such a system of two magnets generates a stronger field and a further horizon of action. Designing a powerful holder? Apply two magnets instead of a neodymium and a steel. Be careful that when bringing together two magnets, the impact force is extreme. The repulsion force is a bit weaker than the attraction, but still impressive.
*Field value between like poles is approximately ~0 Gs at the geometric center between the magnets (due to field cancellation).
* Results apply to sliding force of a pair of same neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (electronics) - precautionary measures
MP 32x16x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 20.5 cm
Hearing aid 10 Gs (1.0 mT) 16.0 cm
Timepiece 20 Gs (2.0 mT) 12.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 9.5 cm
Car key 50 Gs (5.0 mT) 9.0 cm
Payment card 400 Gs (40.0 mT) 3.5 cm
HDD hard drive 600 Gs (60.0 mT) 3.0 cm
Extremely neodym field poses a serious hazard to electronic devices and medical implants. These magnets generate a flux that destroys function of digital equipment. Notice: the invisible magnetic field passes through tissues and glass. Exceptional care must be exercised by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, car keys, membranes, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - warning
MP 32x16x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 16.53 km/h
(4.59 m/s)
 0.14 J
30 mm 18.30 km/h
(5.08 m/s)
 0.18 J
50 mm 18.40 km/h
(5.11 m/s)
 0.18 J
100 mm 18.42 km/h
(5.12 m/s)
 0.18 J
Neodymium magnets are prone to chipping – a violent impact against metal risks their cracking. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Striking energy can trigger coating fragments or painful pinches to skin. Always hold the magnet during bringing near metal so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Use safety goggles when working with large magnets.

Table 9: Surface protection spec
MP 32x16x3 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)
The following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Pc)
MP 32x16x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 38 808 Mx 388.1 µWb
Pc Coefficient 0.90 High (Stable)
Total magnetic flux passing through the magnet pole. Essential parameter when building generators and motors. The Pc coefficient defines the magnet's operating point.

Table 11: Submerged application
MP 32x16x3 / N38

Environment Effective steel pull Effect
Air (land) 2.79 kg Standard
Water (riverbed) 3.19 kg
(+0.40 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
The magnetic field penetrates through water without any losses. However, remember the water resistance when pulling the rope quickly.

1. Vertical hold

*Warning: On a vertical surface, the magnet holds just approx. 20-30% of its max power.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.

3. Heat tolerance

*For N38 material, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.90

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical and environmental data

Material specification

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

Ecology and recycling (GPSR)

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 030198-2026
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It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. It is also often used in advertising for fixing signs and in workshops for organizing tools.
This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because excessive force will cause the ring to crack. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.
These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but is not sufficient for rain. In the place of the mounting hole, the coating is thinner and can be damaged when tightening the screw, which will become a corrosion focus. This product is dedicated for indoor use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.
A screw or bolt with a thread diameter smaller than 16 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Always check that the screw head is not larger than the outer diameter of the magnet (32 mm), so it doesn't protrude beyond the outline.
It is a magnetic ring with a diameter of 32 mm and thickness 3 mm. The key parameter here is the holding force amounting to approximately 2.79 kg (force ~27.40 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 16 mm.
These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths and weaknesses of neodymium magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They do not lose power, even over around ten years – the drop in power is only ~1% (theoretically),
  • Neodymium magnets are characterized by highly resistant to demagnetization caused by external interference,
  • By covering with a shiny coating of silver, the element gains an modern look,
  • Neodymium magnets create maximum magnetic induction on a contact point, which allows for strong attraction,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
  • Possibility of accurate forming and optimizing to complex conditions,
  • Significant place in innovative solutions – they find application in computer drives, drive modules, medical equipment, as well as modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Limitations

Disadvantages of NdFeB magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited ability of producing threads in the magnet and complicated shapes - recommended is a housing - mounting mechanism.
  • Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. Additionally, small components of these products can complicate diagnosis medical in case of swallowing.
  • Due to complex production process, their price is higher than average,

Pull force analysis

Highest magnetic holding force – what it depends on?

Breakaway force is the result of a measurement for ideal contact conditions, including:
  • using a base made of mild steel, serving as a magnetic yoke
  • possessing a thickness of at least 10 mm to avoid saturation
  • with a plane perfectly flat
  • under conditions of ideal adhesion (surface-to-surface)
  • during detachment in a direction perpendicular to the mounting surface
  • at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the application force may be lower subject to the following factors, starting with the most relevant:
  • Distance – the presence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Load vector – highest force is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin steel does not accept the full field, causing part of the flux to be lost into the air.
  • Plate material – mild steel gives the best results. Alloy steels lower magnetic properties and lifting capacity.
  • Base smoothness – the more even the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet’s surface and the plate lowers the load capacity.

Safe handling of neodymium magnets
Threat to navigation

GPS units and mobile phones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Protect data

Powerful magnetic fields can destroy records on credit cards, HDDs, and other magnetic media. Stay away of min. 10 cm.

Dust is flammable

Powder produced during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Warning for allergy sufferers

Nickel alert: The nickel-copper-nickel coating consists of nickel. If skin irritation happens, cease working with magnets and wear gloves.

Bodily injuries

Big blocks can break fingers instantly. Under no circumstances put your hand between two strong magnets.

Medical interference

Warning for patients: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or ask another person to work with the magnets.

Safe operation

Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

Magnets are brittle

Beware of splinters. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.

Thermal limits

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.

This is not a toy

These products are not intended for children. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and necessitates immediate surgery.

Security! Need more info? Check our post: Why are neodymium magnets dangerous?