1、Tested, non-calibrated, long-lin k round steel chains In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. This standard, in clauses 6,7 and 10, includes safety requirements within
2、 the meaning of the Gerlesicherheitsgesetz (Equipment Safety Law). DIN 763 Start of validity This standard is valid from 1 December 1990. 6 7 Dimensions in mm f 03 42 f 1.3 10.8 25,2 0,63 f 035 49 It 1.5 12,6 29,4 0,86 1 Scope and field of application This standard specifies dimensions and mechanica
3、l properties of tested, long-link round steel chains that are not cali- brated. Such chains are not suitable for use with lifting appliances as defined in DIN 15003. Particular attention should be paid to the manufacturers symbol or the test stamp, so as to prevent these chains from being mistaken f
4、or DIN 5685 type G chains, which are not tested. 10 13 16 2 Concepts See DIN 685 Part 1 for definitions. f 0.5 65 f2 18 42 1.75 f 0,65 82 I 23 23,4 54,6 2,95 * 0.8 1 O0 I3 28.8 67,2 4,45 3 Dimensions and designation Designation of a chain in compliance with this standard, where d is equal to 8mm and
5、 is equal to 52 mm: Chain DIN 763 - 8 x 52 Table 1. Nominal size, d Limit deviations Approx. mass, Pitch, t Minimum 1 Limit deviations Continued on pages 2 and 3 uth Verlag GmbH, Berlin. has the exclusive right of sale for German Standards (DIN-Normen). DIN 763 Engl. Price group 01.92 Sales No. 0105
6、 Page2 DIN763 4 5 6 7 8 4 Material Chains shall be made of steel (e.g. complying with DIN 17115), the choice of which being up to the manu- facturer. 1 O0 23 63 160 4 10 200 5 12,5 300 795 19 400 10 25 5 Surface finish Unless otherwise agreed, the chain finish shall be natural black. 6 Safety requir
7、ements 6.1 Dimensions Chain dimensions shall lie within the limit deviations speci- fied in table 1. 6.2 Heat treatment Chains shall be heat treated and shall comply with the safety requirements specified in DIN 685 Part 2. 6.3 Mechanical properties Chains shall comply with the values fortest force
8、and break- ing force specified in table 2. The elongation at fracture shall be not less than 25%. 7 In-process control The requirements specified in DIN 685 Part 3 shall apply for in-process control. 8 Acceptance testing Acceptance testing, which shall be the subject of agree- ment, is to include ad
9、imensional check and a tensile test as described in DIN 685 Part 3. The heat treatment condition may be verified on the basis of a longitudinal microsection of the material (crystalline structure) in the weld zone. In the case of blank chains or those provided with corrosion protection, the values s
10、pecified for breaking force and elon- gation at fracture shall be deemed to have been attained Table 2. Mechanical properties as a function of chah size Lift in g Min. break- Chain size, capacity, Test force, force, I I in kg) I in kN 1 in kN jeq+-j+ 1600 40 1 O0 *) Relates to static loading. where
11、the breaking load is at least90%,and the elongation at fracture is at least 20%, of those specified for a natural black chain of the same nominal thickness. Determination of any additional properties shall be the sub- ject of agreement. 9 Marking Marking of chains shall be in compliance with the Nov
12、em- ber 1981 edition of DIN 685 Part 4, subclause 3.2. 10 Test certificate Chains In compliance with thls standard shall be issued a test certificate in accordance with DIN 685 Part 4, sub- clause 4.2, but without stamps. Standards referred to DIN 685 Part 1 Tested round steel chains; concepts DIN 6
13、85 Pari 2 Tested round steel chains; safety requirements DIN 685 Pari 3 Tested round steel chains; testing DIN DIN 5685 DIN 15003 DIN 17115 685 Part 4 Tested round steel chains; marking and test certificate Untested, round steel chains with long or medium-length links Lifting appliances; loads and f
14、orces; concepts Steel for welded round steel chains; technical delivery conditions Previous editions DIN 763: 03.37, 05.43,06.56x, 09.76. Amendments The following amendments have been made to the September 1976 edition. a) The form of the standard has been brought into line with other chain standard
15、s. b) Closer tolerances on nominal size and pitch have been specified. c) Values specified for width have been amended. d) A minimum value of elongation at fracture (25%) has been included. DIN763 Page3 Explanatory notes Although the chain sizes given have not been changed, the tolerances specified
16、have been brought into line with other stand- ards on round steel chains. Likewise, the values given for pitch have not been changed, but the tolerances have been reduced from about 15% to about I396 of the nominal size. The values specified forwidth have been changed. In the previous edition of thi
17、s standard, only the outside width was specified, with limit deviations of about f5%, which led to practical problems, especially with regard to attachment of the chains to equipment. Therefore, the chain dimensions have been designed as follows. Minimum inside width, bl Max. diameter of welded leg,
18、 d, Diameter of unwelded leg, d i,8 d i ,075 d id Tolerance on width, Bt 0,325 d Maximum outside width, b2 42 d The mechanical properties specified in table 2 are based on the following design stresses, which are in relation to each other by the ratio 1 : 2,5 : 6.3. In table 2, the resulting test fo
19、rce and breaking force values have been given to the next highest or lowest preferred number. The revision of this standard was also undertaken to reflect the requirements specified in DIN 820 Part 22. As regards testing, marking and the test certificate, reference is now made to the revised editions of DIN 685 Parts 3 and 4. International Patent Classification F i6 G 13/00 F 16 G 15/00
