1、DEUTSCHE NORM April 199 I I Tested medium tolerance round steel link chains Part 1: Grade 5 DIN 5687-1 ICs 53.020.30 Descriptors: Steel, chains, grade 5, requirements. Supersedes June 1980 edition. Rundstahlketten - Teil 1 : Gteklasse 5, mittel toleriert, geprft In keeping with current practice in s
2、tandards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. Clauses 7 and 8 of this standard include safety requirements within the meaning of the Gertesicher- heitsgesetz (German Equipment Safety Law). Foreword This standar
3、d has been prepared by theNormenausschu Rundstahlketten (Round Steel Link Chains Stand- ards Committee), Technical CommitteeAnschlagketten undZubehr, in cooperation with theNorddeutsche Me tall- Berufsgenossenschaft. Amendments The following amendments have been made to the June 1980 edition. a) The
4、 text of the standard has been restructured. b) As regards the manufacturing proof test, the acceptance inspection, marking, test certificate and use, reference is now made to DIN 685-3 to DIN 685-5. Previous editions DIN 5687-1 : 1972-06. 1980-06. 1 Scope and field of application This standard spec
5、ifies dimensions and requirements for tested medium tolerance round steel link chains of grade 5, mainly used for manufacturing chain slings as specified in DIN 5688-1. 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These normati
6、ve references are cited at the appropriate places in the text and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of the publications apply to this standard only when incorporated in it by amendment or revision. For undated referenc
7、es, the latest edition of the publication referred to applies. DIN 685-1 Tested round steel chains - Concepts DIN 685-2 Tested round steel chains - Safety requirements DIN 685-3 Tested round steel chains - Testing Continued on pages 2 to 5. Translation by DIN-Sprachendienst. In case of doubt, the Ge
8、rman-language original should be consulted as the authoritative text. O No part of this translation may be reproduced without the prior permission of Ref. No. DIN 5687-1 : 1996-04 English price group 05 Sales No. 0105 DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, D-10772 Berlin
9、, has the exclusive right of sale for German Standards (DIN-Normen). 12.97 Page 2 DIN 5687-1 : 1996-04 DIN 685-4 Tested round steel chains - Marking and test certificate DIN 685-5 Tested round steel chains - Use DIN 5688-1 Grade 5 chain slings with hook or ring type terminal fittings DIN 171 15 Stee
10、l for welded round steel chains - Technical delivery conditions 3 Concepts For concepts, see DIN 685-1. 4 Dimensions and designation Figure 1 Designation of a grade 5 round steel link chain, with a nominal link size, d, of 8 mm and a pitch, t, of 24 mm: Chain DIN 5687 - 5 - 8 x 24 Designation to be
11、used when ordering: Example of an order for 100 m of round steel link chain of grade 5, with a nominal link size, d, of 8 mm and a pitch, t, of 24 mm: 100 m chain DIN 5687-5-8x24 5 Material Chains shall be made at least of grade 15 Mn3 Ai steel as specified in DIN 171 15. The material composition an
12、d manufacture shall be as specified in DIN 685-2. 6 Finish 6.1 Surface finish The standard surface finish shall be natural black, other finishes being the subject of agreement. 6.2 Weld The weld diameter, d, shall neither be less than d nor exceed d by more than 7,5 %. Welds shall be positioned in t
13、he centre of one leg of the links, with the length affected by welding, a, not exceeding the value of d (cf. annex B). 7 Requirements 7.1 Dimensions The chain dimensions and limit deviations shall be in accordance with table 1. The chain length as supplied shall not differ from the length ordered by
14、 more than f 1,751 YO. 7.2 Heat treatment The chains shall be heat treated and meet the requirements specified in DIN 685-2. Page 3 DIN 5687-1 : 1996-04 Table 1: Dimensions and mass Dimensions in mm Nominal link size Limit deviations Limit deviations Table 2: Mechanical properties Dimensions in mm P
15、age 4 7.3 Mechanical properties The manufacturing proof force, breaking force and bend deflection of chains shall be as specified in table 2, with the total ultimate elongation being at least 25 %.l) These values shall also be achieved after re-heating of chains to 400 OC. No cracks shall occur when
16、 subjecting chains to bend testing. DIN 5687-1 : 1996-04 8 Manufacturing proof test For manufacturing proof testing, the specifications of DIN 685-3 shall apply. 9 Acceptance inspection Acceptance inspection shall cover a dimensional check, tensile testing and bend testing as specified in Any other
17、tests may be agreed upon when ordering. DIN 685-3. 10 Marking Marking of chains shall be as specified in DIN 685-4. In addition, chains shall have a green pentagonal iden- tification tag affixed to each unit delivered, as illustrated in figure 2. Test stamp of chain y manufacturer to DIN 685-4 Nomin
18、al chain size (in mm) / Figure 2 11 Test certificate A test certificate shall be issued in accordance with DIN 685-4. 12 Use Handling, inspection and maintenance of chains shall comply with the specifications of DIN 685-5. Annex A Other relevant standards DIN 695 DIN 32891 DIN EN 818-2 DIN EN 818-3
19、DIN EN 818-4 DIN EN 818-5 Grade 2 chain slings with hook or ring type terminal fittings Tested non-calibrated round steel link chains, grade 2 Safety of short link chainsfor lifting purposes - Part 2: Medium tolerance chain for chain slings, grade 8 Safety of short link chainsfor lifting purposes -
20、Part 3: Medium tolerance chain for chain slings, grade 4*) Safety of short link chains for lifting purposes - Part 4: Chain slings, grade 8 Safety of short link chains for lifting purposes - Part 5: Chain slings, grade 4*) VBG-Richtlinie (VBG Code of practice) 9a Lastaufnahmeeinrichtungen im Hebezeu
21、gbetrieb (Load carrying devices for lifting purposes) 1) Where natural black chain slings are to be supplied with a blank surface, the total ultimate elongation shall be at least 20 %, and the specifications for the manufacturing proof force and breaking force specified in table 2 shall be complied
22、with. *) At present at the stage of draft. Page 5 DIN 5687-1 : 1996-04 Annex B Explanatory notes This standard has been revised in form, not in substance. The limit deviations for the pitch specified in table 1 correspond to a tolerance off 3 %, rounded to 1/10 mm. The link dimensions shown in table
23、 B.l have been derived from the nominal link size,d, including widths b, and b, as given in table 1, which have been rounded to 1/10 mm. Table B.1: Design dimensions as a function of link size Minimum inside width, bii) Maximum diameter of welded leg, d, Diameter of unwelded leg, d Approx. tolerance
24、 on width, B, Maximum outside width, b, Th 135 d 1,075 d Id 0,175 d 3,6 d values l) The minimum inside width, together with a clearance between welds of interlocking links, s, equal to 0,275 d, ensure freedom from kinking or locking of chain links. Figure B.l: Chain link (notation) f mechanical prop
25、erties given in table 2 are based on the value given in table B.2. Table 8.2: Design parameters for specifying mechanical properties Stress at working load limit Stress at manufacturing test force Stress at breaking force Ratio of stresses at working load limit to those at I manufacturing test force and breaking force I Minimum bend deflection I 500 N/mm2 I 1 : 2,5 : 4 I f=O,xd I
