Product available Ships tomorrow

MW 40x8 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

cylindrical magnet

Catalog no 010069

GTIN/EAN: 5906301810681

5.00

Diameter Ø

40 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

75.4 g

Magnetization Direction

↑ axial

Load capacity

20.43 kg / 200.39 N

Magnetic Induction

230.22 mT / 2302 Gs

Coating

[NiCuNi] Nickel

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31.27 ZŁ with VAT / pcs + price for transport

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Technical parameters of the product - MW 40x8 / N38 - cylindrical magnet

Specification / characteristics - MW 40x8 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010069
GTIN/EAN	5906301810681
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 Ø	40 mm [±0,1 mm]
Height	8 mm [±0,1 mm]
Weight	75.4 g
Magnetization Direction	↑ axial
Load capacity ~ ?	20.43 kg / 200.39 N
Magnetic Induction ~ ?	230.22 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 40x8 / N38 - cylindrical magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°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	312 - 380	°C
Curie Temperature TF	593 - 716	°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

Physical analysis of the assembly - data

Presented data constitute the direct effect of a mathematical calculation. Values were calculated on models for the class Nd₂Fe₁₄B. Operational parameters may differ. Use these calculations as a preliminary roadmap when designing systems.

Table 1: Static force (pull vs distance) - interaction chart
MW 40x8 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	2302 Gs 230.2 mT	20.43 kg / 20430.0 g 200.4 N	crushing
1 mm	2235 Gs 223.5 mT	19.25 kg / 19252.0 g 188.9 N	crushing
2 mm	2156 Gs 215.6 mT	17.92 kg / 17917.4 g 175.8 N	crushing
3 mm	2068 Gs 206.8 mT	16.49 kg / 16490.6 g 161.8 N	crushing
5 mm	1875 Gs 187.5 mT	13.56 kg / 13556.7 g 133.0 N	crushing
10 mm	1375 Gs 137.5 mT	7.29 kg / 7287.4 g 71.5 N	strong
15 mm	959 Gs 95.9 mT	3.54 kg / 3542.3 g 34.8 N	strong
20 mm	661 Gs 66.1 mT	1.68 kg / 1684.9 g 16.5 N	weak grip
30 mm	328 Gs 32.8 mT	0.41 kg / 414.2 g 4.1 N	weak grip
50 mm	105 Gs 10.5 mT	0.04 kg / 42.3 g 0.4 N	weak grip

Magnetic force weakens sharply with every subsequent millimeter of gap. Note that even a microscopic distance (e.g., dirt, paint, dust) noticeably reduces the pull force. Neodymiums work optimally at the point of direct contact; gap drastically cuts the power. Analyze how flashily the load capacity drop, when the product does not adhere flatly to the metal substrate. When designing the mounting, discard additional spacers.

Table 2: Slippage load (vertical surface)
MW 40x8 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	4.09 kg / 4086.0 g 40.1 N
1 mm	Stal (~0.2)	3.85 kg / 3850.0 g 37.8 N
2 mm	Stal (~0.2)	3.58 kg / 3584.0 g 35.2 N
3 mm	Stal (~0.2)	3.30 kg / 3298.0 g 32.4 N
5 mm	Stal (~0.2)	2.71 kg / 2712.0 g 26.6 N
10 mm	Stal (~0.2)	1.46 kg / 1458.0 g 14.3 N
15 mm	Stal (~0.2)	0.71 kg / 708.0 g 6.9 N
20 mm	Stal (~0.2)	0.34 kg / 336.0 g 3.3 N
30 mm	Stal (~0.2)	0.08 kg / 82.0 g 0.8 N
50 mm	Stal (~0.2)	0.01 kg / 8.0 g 0.1 N

The following data defines the approximate force required to initiate the slippage of the magnet down against a upright metal surface (considering standard friction coefficient). This parameter varies with the air gap between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MW 40x8 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	6.13 kg / 6129.0 g 60.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	4.09 kg / 4086.0 g 40.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	2.04 kg / 2043.0 g 20.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	10.22 kg / 10215.0 g 100.2 N

When mounting a element on a vertical surface (e.g., a car body), it will maintain barely about 20%-30% of nominal attraction strength. Gravitational force as well as a weak degree of grip cause that holders move down faster than they detach. Want to create a hanger? Consider that the sliding force is noticeably lower than the maximum static pull force. On a painted metal, the holder will slip down under a significantly smaller weight. Utilizing a rubberized coating can significantly increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 40x8 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	5%	1.02 kg / 1021.5 g 10.0 N
1 mm	13%	2.55 kg / 2553.8 g 25.1 N
2 mm	25%	5.11 kg / 5107.5 g 50.1 N
5 mm	63%	12.77 kg / 12768.8 g 125.3 N
10 mm	100%	20.43 kg / 20430.0 g 200.4 N

A too thin steel is unable to focus the full magnetic flux, which wastes potential of the magnet. Should you install a neodymium to a thin surface, the flux will pass right through and the holding will be smaller. To utilize 100% of this neodymium's power, you require a sufficiently solid element of metal. The material oversaturation means that on thin elements (e.g., car bodies), the product shows lower pull force. We suggest choosing the steel thickness from these parameters.

Table 5: Thermal resistance (stability) - thermal limit
MW 40x8 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	20.43 kg / 20430.0 g 200.4 N	OK
40 °C	-2.2%	19.98 kg / 19980.5 g 196.0 N	OK
60 °C	-4.4%	19.53 kg / 19531.1 g 191.6 N
80 °C	-6.6%	19.08 kg / 19081.6 g 187.2 N
100 °C	-28.8%	14.55 kg / 14546.2 g 142.7 N

Standard neodymium magnets lose parameters above the temperature limit. Protect against heat – high temperature can irreversibly destroy this magnet. With every degree above norm, the magnet's force briefly drops. Do not use this magnet near heat sources exceeding its working range. Exceeding the critical threshold will result in irreversible degradation of magnetic properties.

*Technical advisory: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 40x8 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	41.05 kg / 41054 g 402.7 N 3 871 Gs	N/A
1 mm	39.92 kg / 39925 g 391.7 N 4 540 Gs	35.93 kg / 35932 g 352.5 N ~0 Gs
2 mm	38.69 kg / 38687 g 379.5 N 4 469 Gs	34.82 kg / 34818 g 341.6 N ~0 Gs
3 mm	37.38 kg / 37376 g 366.7 N 4 393 Gs	33.64 kg / 33638 g 330.0 N ~0 Gs
5 mm	34.59 kg / 34588 g 339.3 N 4 226 Gs	31.13 kg / 31129 g 305.4 N ~0 Gs
10 mm	27.24 kg / 27242 g 267.2 N 3 750 Gs	24.52 kg / 24518 g 240.5 N ~0 Gs
20 mm	14.64 kg / 14644 g 143.7 N 2 750 Gs	13.18 kg / 13180 g 129.3 N ~0 Gs
50 mm	1.65 kg / 1645 g 16.1 N 922 Gs	1.48 kg / 1481 g 14.5 N ~0 Gs

Two strong neodymiums interact from a significantly greater distance than a magnet and steel setup. Such a system of magnet-to-magnet generates a stronger field and a larger range of operation. Want to build a solid fastener? Apply two magnets instead of a neodymium and a striker plate. Remember that when bringing together two magnets, the collision energy is massive. The levitation is slightly lower than the attraction, but still large.
*The magnetic induction between like poles drops to ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).

Table 7: Safety (HSE) (electronics) - warnings
MW 40x8 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	15.5 cm
Hearing aid	10 Gs (1.0 mT)	12.5 cm
Timepiece	20 Gs (2.0 mT)	9.5 cm
Mobile device	40 Gs (4.0 mT)	7.5 cm
Car key	50 Gs (5.0 mT)	7.0 cm
Payment card	400 Gs (40.0 mT)	3.0 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

Powerful magnet radiation poses a large risk to IT equipment and pacemakers. These magnets produce a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and plastic. Exceptional care must be exercised by people with hearing aids and insulin pumps. Also at risk are: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - collision effects
MW 40x8 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	19.96 km/h (5.54 m/s)	1.16 J
30 mm	29.12 km/h (8.09 m/s)	2.47 J
50 mm	37.17 km/h (10.32 m/s)	4.02 J
100 mm	52.50 km/h (14.58 m/s)	8.02 J

NdFeB products are very brittle – a strong collision with metal can result in shattering. Watch the impact speed – a neodymium left loose turns into a projectile. Impact energy can cause material chips or dangerous crushing to skin. Always hold the magnet during mounting so it doesn't slam with momentum against the metal. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when playing with large magnets.

Table 9: Anti-corrosion coating durability
MW 40x8 / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Note the thickness of the protective layer.

Table 10: Construction data (Flux)
MW 40x8 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	33 553 Mx	335.5 µWb
P_c Coefficient	0.29	Low (Flat)

Flux value passing through the pole surface. Essential parameter when building generators as well as sensors. The P_c coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 40x8 / N38

Environment	Effective steel pull	Effect
Air (land)	20.43 kg	Standard
Water (riverbed)	23.39 kg (+2.96 kg Buoyancy gain)	+14.5%

Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Wall mount (shear)

*Warning: On a vertical wall, the magnet holds merely ~20% of its perpendicular strength.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) severely weakens the holding force.

3. Thermal stability

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.29

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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 P_c (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 P_c 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.

Engineering data and GPSR

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: 010069-2025

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19.00 ZŁ brutto / pcs

This product is an extremely powerful cylindrical magnet, composed of durable NdFeB material, which, at dimensions of Ø40x8 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 20.43 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is created for building generators, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 200.39 N with a weight of only 75.4 g, this rod is indispensable in miniature devices and wherever every gram matters.

Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø40x8), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.

The presented product is a neodymium magnet with precisely defined parameters: diameter 40 mm and height 8 mm. The value of 200.39 N means that the magnet is capable of holding a weight many times exceeding its own mass of 75.4 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.

Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 40 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Pros and cons of neodymium magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They virtually do not lose power, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
Magnets very well resist against demagnetization caused by ambient magnetic noise,
The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
Magnetic induction on the working part of the magnet turns out to be maximum,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
In view of the possibility of flexible forming and adaptation to individualized projects, NdFeB magnets can be created in a broad palette of shapes and sizes, which makes them more universal,
Universal use in modern industrial fields – they are utilized in mass storage devices, brushless drives, precision medical tools, also other advanced devices.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:

Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
Neodymium 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 very 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.
Due to limitations in realizing threads and complicated forms in magnets, we propose using casing - magnetic holder.
Health risk related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the context of child safety. Furthermore, small components of these products can disrupt the diagnostic process medical after entering the body.
Due to neodymium price, their price is relatively high,

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what contributes to it?

The force parameter is a measurement result conducted under the following configuration:

with the application of a sheet made of special test steel, guaranteeing maximum field concentration
with a cross-section minimum 10 mm
with a plane perfectly flat
without the slightest insulating layer between the magnet and steel
during detachment in a direction vertical to the plane
in temp. approx. 20°C

Practical aspects of lifting capacity – factors

During everyday use, the actual holding force is determined by many variables, presented from the most important:

Distance – existence of any layer (rust, dirt, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
Load vector – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
Steel grade – ideal substrate is pure iron steel. Cast iron may have worse magnetic properties.
Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Warnings

Magnetic interference

Note: rare earth magnets produce a field that confuses precision electronics. Maintain a safe distance from your phone, device, and navigation systems.

Magnets are brittle

NdFeB magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets leads to them cracking into small pieces.

Metal Allergy

Some people experience a contact allergy to Ni, which is the standard coating for neodymium magnets. Frequent touching may cause dermatitis. We suggest use protective gloves.

Threat to electronics

Device Safety: Neodymium magnets can damage payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).

Medical interference

For implant holders: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Keep away from children

Only for adults. Small elements can be swallowed, causing severe trauma. Store out of reach of children and animals.

Thermal limits

Monitor thermal conditions. Exposing the magnet to high heat will ruin its properties and strength.

Caution required

Be careful. Neodymium magnets act from a distance and snap with massive power, often faster than you can react.

Combustion hazard

Drilling and cutting of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Hand protection

Watch your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Security! More info about hazards in the article: Magnet Safety Guide.

MW 40x8 / N38 - cylindrical magnet

Technical parameters of the product - MW 40x8 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the assembly - data

Table 1: Static force (pull vs distance) - interaction chart MW 40x8 / N38

Table 2: Slippage load (vertical surface) MW 40x8 / N38

Table 3: Wall mounting (shearing) - vertical pull MW 40x8 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MW 40x8 / N38

Table 5: Thermal resistance (stability) - thermal limit MW 40x8 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MW 40x8 / N38

Table 7: Safety (HSE) (electronics) - warnings MW 40x8 / N38

Table 8: Impact energy (kinetic energy) - collision effects MW 40x8 / N38

Table 9: Anti-corrosion coating durability MW 40x8 / N38

Table 10: Construction data (Flux) MW 40x8 / N38

Table 11: Hydrostatics and buoyancy MW 40x8 / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Thermal stability

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

Material specification

Ecology and recycling (GPSR)

Pulling force

Field Strength

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UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

MPL 10x5x1.5 / N38 - lamellar magnet

MW 6x6 / N38 - cylindrical magnet

MPL 60x10x5 / N38 - lamellar magnet

Pros and cons of neodymium magnets.

Pros

Weaknesses

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Practical aspects of lifting capacity – factors

Warnings

Magnetic interference

Magnets are brittle

Metal Allergy

Threat to electronics

Medical interference

Keep away from children

Thermal limits

Caution required

Combustion hazard

Hand protection

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - interaction chart
MW 40x8 / N38

Table 2: Slippage load (vertical surface)
MW 40x8 / N38

Table 3: Wall mounting (shearing) - vertical pull
MW 40x8 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 40x8 / N38

Table 5: Thermal resistance (stability) - thermal limit
MW 40x8 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 40x8 / N38

Table 7: Safety (HSE) (electronics) - warnings
MW 40x8 / N38

Table 8: Impact energy (kinetic energy) - collision effects
MW 40x8 / N38

Table 9: Anti-corrosion coating durability
MW 40x8 / N38

Table 10: Construction data (Flux)
MW 40x8 / N38

Table 11: Hydrostatics and buoyancy
MW 40x8 / N38