DIN EN 20898 1 PDF
January 29, 2020 | by admin
The European Standard EN has the status of a . ISO (upon which BS EN is based), altering clause 1. Standard [WITHDRAWN] DIN EN Mechanical properties of fasteners; bolts, screws and studs (ISO ); german version EN. Purchase your copy of BS EN , ISO as a PDF download or hard copy directly from the official BSI Shop. All BSI British.
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Nuts with specified proof load values — Coarse thread.
Mechanical properties, screws and studs EN ISO 898-1:2013
The maximum value for G and the formulae for the minimum value for E are specified in Table 3. B, Mn or Cr 0,15 d 0,35 0, 0, 0, quenched and tempered Carbon steel quenched and tempered 0,25 0,55 0, 0, Torsional test 2098 minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm?
Surface hardness readings taken at HV 0,3 shall be compared with a similar core hardness reading at HV 0,3 in order to make a 20889 comparison and determine the relative increase which is permissible up to 30 Vickers points. Revisions British Standards are updated by amendment di revision. Figure 5 — Zones of decarburization 8. The marking is obligatory for all property classes, preferably on the top of the head by indenting or embossing or on the side of the head by indenting see Figure 7.
The length of free thread subjected to the load shall be one diameter 1d.
A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent em. The test for strength under wedge loading shall be carried out in tensile testing equipment fin in ISO using a wedge as illustrated in Figure 3.
|خواص مکانیکی- DIN EN
Marking is required for hexagon and hexalobular socket head cap screws with nominal diameters d W 5 mm. For measurement of permanent extension, the bolt or screw shall be suitably prepared at each end, see Figure 2.
A British Standard does not purport to include all the necessary provisions of a contract. ISO consists of the following parts, under the general title Mechanical properties of fasteners made of carbon steel and alloy steel: ISO is an international standard that defines mechanical and physical properties for metric fasteners.
Remember me on this computer. Help Center Find new research papers in: In this case the height of the non-decarburized zone E shall be at wn as specified in Table Each member body interested in a subject for which a technical committee has been established has the right to be represented dun that committee. The xin applies to bolts and screws with nominal thread diameters d u 3 mm as well as to short bolts and screws with nominal thread diameters 3 mm u d u 10 mm which cannot be subjected to a tensile test.
There may not be a direct relationship between hardness and theoretical tensile strength. Part 6 is the same as 20988 2 except for fine threaded nuts that range from M8 to M The bolt or screw shall meet the requirements for minimum tensile 220898, either during wedge tensile testing or in a supplementary tensile test without a wedge, according to the values given for the relevant property class before fracture occurs.
It defines properties for sizes M1.
Mechanical properties, screws and studs EN ISO – Nordic Fastening Group AB
For testing of full-size bolts, screws and studs the loads given in Table 6 to Table 9 shall be applied. The properties are defined for M1. The full proof load shall be held for 15 s. It is the vin aim of BSI to improve the quality of our products and services.
Nuts with specified property classes — Coarse thread and fine pitch thread — Part 5: NOTE Careful differentiation should be made between an increase in hardness caused by carburization and that due to heat-treatment or cold working of the surface.
The application of programme B is always desirable, but is mandatory for products with ultimate tensile loads less than kN if the application of programme A 200898 not explicitly agreed. Nuts with specified proof load values — Coarse thread; — Part 5: Further guidance for application of the specific property classes is given in the relevant product standards.
Table 16 — Alternative marking symbols for studs Property class 5. Contact the Information Centre. Programme A is suitable for machined test pieces and for bolts with a shank area less than the stress area.
If marking on the unthreaded part is not possible, marking of property class only on the nut end of the stud is allowed, see Figure Log In Sign Up. Torsional test and minimum torques for bolts and screws with nominal diameter from 1 mm to 10 mm.