1、May 2013 Translation by DIN-Sprachendienst.English price group 23No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 21
2、.060.10!%# d, or screw threaded to the head, or fully threaded stud 3.4 fastener with reduced shank finished fastener with a shank diameter of ds d23.5 fastener with waisted shank finished fastener with a shank diameter of ds39 mm), provided all applicable requirements in accordance with Tables 2 an
3、d 3 are met. Information on the relationship between the nominal tensile strength and elongation after fracture for each property class is given in Annex A. 6 Materials Table 2 specifies limits for the chemical composition of steels and minimum tempering temperatures for the different property class
4、es of bolts, screws and studs. The chemical composition shall be assessed in accordance with the relevant International Standards. NOTE National regulations for the restriction or prohibition of certain chemical elements might also have to be taken into account in the countries or regions concerned.
5、 For fasteners that are to be hot dip galvanized, the additional material requirements given in ISO 10684 apply. 9DIN EN ISO 898-1:2013-05 EN ISO 898-1:2013 (E) Table 2 Steels Chemical composition limit (cast analysis, %)aTempering temperature C P S BbC Property class Material and heat treatment min
6、. max. max. max. max. min. 4.6c d4.8d 0,55 0,050 0,060 5.6c0,13 0,55 0,050 0,060 5.8d 0,55 0,050 0,060 6.8dCarbon steel or carbon steel with additives 0,15 0,55 0,050 0,060 Not specified Carbon steel with additives (e.g. Boron or Mn or Cr) quenched and tempered 0,15e0,40 0,025 0,025 or Carbon steel
7、quenched and tempered 0,25 0,55 0,025 0,025 or 8.8fAlloy steel quenched and temperedg0,20 0,55 0,025 0,025 0,003 425 Carbon steel with additives (e.g. Boron or Mn or Cr) quenched and tempered 0,15e0,40 0,025 0,025 or Carbon steel quenched and tempered 0,25 0,55 0,025 0,025 or 9.8fAlloy steel quenche
8、d and temperedg0,20 0,55 0,025 0,025 0,003 425 Carbon steel with additives (e.g. Boron or Mn or Cr) quenched and tempered 0,20e0,55 0,025 0,025 or Carbon steel quenched and tempered 0,25 0,55 0,025 0,025 or 10.9fAlloy steel quenched and temperedg0,20 0,55 0,025 0,025 0,003 425 12.9f h iAlloy steel q
9、uenched and temperedg0,30 0,50 0,025 0,025 0,003 425 12.9f h iCarbon steel with additives (e.g. Boron or Mn or Cr or Molybdenum) quenched and tempered 0,28 0,50 0,025 0,025 0,003 380 aIn case of dispute, the product analysis applies. bBoron content can reach 0,005 %, provided non-effective boron is
10、controlled by the addition of titanium and/or aluminium. c For cold forged fasteners of property classes 4.6 and 5.6, heat treatment of the wire used for cold forging or of the cold forged fastener itself may be necessary to achieve required ductility. d Free cutting steel is allowed for these prope
11、rty classes with the following maximum sulfur, phosphorus and lead contents: S: 0,34 %; P: 0,11 %; Pb: 0,35 %. eIn case of plain carbon boron steel with a carbon content below 0,25 % (cast analysis), the minimum manganese content shall be 0,6 % for property class 8.8 and 0,7 % for property classes 9
12、.8 and 10.9. fFor the materials of these property classes, there shall be a sufficient hardenability to ensure a structure consisting of approximately 90 % martensite in the core of the threaded sections for the fasteners in the “as-hardened” condition before tempering. gThis alloy steel shall conta
13、in at least one of the following elements in the minimum quantity given: chromium 0,30 %, nickel 0,30 %, molybdenum 0,20 %, vanadium 0,10 %. Where elements are specified in combinations of two, three or four and have alloy contents less than those given above, the limit value to be applied for steel
14、 class determination is 70 % of the sum of the individual limit values specified above for the two, three or four elements concerned. hFasteners manufactured from phosphated raw material shall be dephosphated before heat treatment; the absence of white phosphorus enriched layer shall be detected by
15、a suitable test method. iCaution is advised when the use of property class 12.9/12.9 is considered. The capability of the fastener manufacturer, the service conditions and the wrenching methods should be considered. Environments can cause stress corrosion cracking of fasteners as processed as well a
16、s those coated. 10DIN EN ISO 898-1:2013-05 EN ISO 898-1:2013 (E) 7 Mechanical and physical properties The bolts, screws and studs of the specified property classes shall, at ambient temperature2), meet all the applicable mechanical and physical properties in accordance with Tables 3 to 7, regardless
17、 of which tests are performed during manufacturing or final inspection. Clause 8 sets forth the applicability of test methods for verifying that fasteners of different types and dimensions fulfil the properties in accordance with Table 3 and Tables 4 to 7. NOTE 1 Even if the steel properties of the
18、fasteners meet all relevant requirements specified in Tables 2 and 3, some types of fasteners have reduced loadability due to dimensional reasons (see 8.2, 9.4 and 9.5). NOTE 2 Although a great number of property classes are specified in this part of ISO 898, this does not mean that all classes are
19、appropriate for all fasteners. Further guidance for application of the specific property classes is given in the relevant product standards. For non-standard fasteners, it is advisable to follow as closely as possible the choice already made for similar standard fasteners. Table 3 Mechanical and phy
20、sical properties of bolts, screws and studs Property class 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9/ 12.9 No. Mechanical or physical property d 16 mmad 16 mmbd 16 mm nom.c400 500 600 800 900 1 000 1 200 1 Tensile strength,Rm, MPa min. 400 420 500 520 600 800 830 900 1 040 1 220 nom.c240 300 2 Lower yie
21、ld strength, ReLd, MPa min. 240 300 nom.c 640 640 720 900 1 080 3 Stress at 0,2 % non-proportional elongation, Rp0,2, MPa min. 640 660 720 940 1 100 nom.c 320 400 480 4 Stress at 0,0048d non-proportional elongation for full-size fasteners, Rpf, MPa min. 340e 420e 480e Stress under proof load, Spf, M
22、Pa nom. 225 310 280 380 440 580 600 650 830 970 5 Proof strength ratio Sp,nom/ReL,minor Sp,nom/Rp0,2 minor Sp,nom/Rpf,min0,94 0,91 0,93 0,90 0,92 0,91 0,91 0,90 0,88 0,88 6 Percentage elongation after fracture for machined test pieces, A, % min. 22 20 12 12 10 9 8 7 Percentage reduction of area afte
23、r fracture for machined test pieces, Z, % min. 52 48 48 44 8 Elongation after fracture for full-size fasteners, Af(see also Annex C) min. 0,24 0,22 0,20 9 Head soundness No fracture 2) Impact strength is tested at a temperature of 20 C (see 9.14). 11DIN EN ISO 898-1:2013-05 EN ISO 898-1:2013 (E) Tab
24、le 3 (continued) Property class 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9/12.9 No. Mechanical or physical property d 16 mmad 16 mmbd 16 mm min. 120 130 155 160 190 250 255 290 320 385 10 Vickers hardness, HV F 98 N max. 220g250 320 335 360 380 435 min. 114 124 147 152 181 245 250 286 316 380 11 Brinell
25、hardness, HBW F = 30 D2max. 209g238 316 331 355 375 429 min. 67 71 79 82 89 Rockwell hardness, HRB max. 95,0g99,5 min. 22 23 28 32 39 12 Rockwell hardness, HRC max. 32 34 37 39 44 13 Surface hardness, HV 0,3 max. 390 435 14 Non-carburization, HV 0,3 max. hhhHeight of non-decarburized thread zone, E,
26、 mm min. 1/2H12/3H13/4H115 Depth of complete decarburization in the thread, G, mm max. 0,015 16 Reduction of hardness after retempering, HV max. 20 17 Breaking torque, MB, Nm min. in accordance with ISO 898-7 18 Impact strength, KVi j, J min. 27 27 27 27 27 k19 Surface integrity in accordance with I
27、SO 6157-1lISO 6157-3 a Values do not apply to structural bolting. b For structural bolting d M12. c Nominal values are specified only for the purpose of the designation system for property classes. See Clause 5. d In cases where the lower yield strength, ReL, cannot be determined, it is permissible
28、to measure the stress at 0,2 % non-proportional elongation Rp0,2. e For the property classes 4.8, 5.8 and 6.8, the values for Rpf,minare under investigation. The values at the time of publication of this part of ISO 898 are given for calculation of the proof stress ratio only. They are not test valu
29、es. f Proof loads are specified in Tables 5 and 7. g Hardness determined at the end of a fastener shall be 250 HV, 238 HB or 99,5 HRB maximum. h Surface hardness shall not be more than 30 Vickers points above the measured base metal hardness of the fastener when determination of both surface hardnes
30、s and base metal hardness are carried out with HV 0,3 (see 9.11). i Values are determined at a test temperature of 20 C (see 9.14). jApplies to d 16 mm. kValue for KVis under investigation. lInstead of ISO 6157-1, ISO 6157-3 may apply by agreement between the manufacturer and the purchaser. 12DIN EN
31、 ISO 898-1:2013-05 EN ISO 898-1:2013 (E) Table 4 Minimum ultimate tensile loads ISO metric coarse pitch thread Property class 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9/12.9 Threada d Nominal stress area As,nombmm2Minimum ultimate tensile load, Fm,min(As,nom Rm,min), N M3 M3,5 M4 5,03 6,78 8,78 2 010 2 7
32、10 3 510 2 110 2 850 3 690 2 510 3 390 4 390 2 620 3 530 4 570 3 020 4 070 5 270 4 020 5 420 7 020 4 530 6 100 7 900 5 230 7 050 9 130 6 140 8 270 10 700 M5 M6 M7 14,2 20,1 28,9 5 680 8 040 11 600 5 960 8 440 12 100 7 100 10 000 14 400 7 380 10 400 15 000 8 520 12 100 17 300 11 350 16 100 23 100 12
33、800 18 100 26 000 14 800 20 900 30 100 17 300 24 500 35 300 M8 M10 M12 36,6 58 84,3 14 600c23 200c33 700 15 400 24 400 35 400 18 300c29 000c42 200 19 000 30 200 43 800 22 000 34 800 50 600 29 200c46 400c67 400d32 900 52 200 75 900 38 100c60 300c87 700 44 600 70 800 103 000 M14 M16 M18 115 157 192 46
34、 000 62 800 76 800 48 300 65 900 80 600 57 500 78 500 96 000 59 800 81 600 99 800 69 000 94 000 115 000 92 000d125 000d159 000 104 000141 000 120 000 163 000 200 000 140 000 192 000 234 000 M20 M22 M24 245 303 353 98 000 121 000 141 000 103 000 127 000 148 000 122 000 152 000 176 000 127 000158 0001
35、84 000 147 000182 000212 000 203 000 252 000 293 000 255 000 315 000 367 000 299 000 370 000 431 000 M27 M30 M33 459 561 694 184 000 224 000 278 000 193 000 236 000 292 000 230 000 280 000 347 000 239 000292 000361 000 275 000337 000416 000 381 000 466 000 576 000 477 000 583 000 722 000 560 000 684
36、 000 847 000 M36 M39 817 976 327 000 390 000 343 000 410 000 408 000 488 000 425 000508 000 490 000586 000 678 000 810 000 850 000 1 020 000 997 0001 200 000 aWhere no thread pitch is indicated in a thread designation, coarse pitch is specified. bTo calculate As,nom, see 9.1.6.1. cFor fasteners with
37、 thread tolerance 6az in accordance with ISO 965-4 subject to hot dip galvanizing, reduced values in accordance with ISO 10684:2004, Annex A, apply. dFor structural bolting 70 000 N (for M12), 95 500 N (for M14) and 130 000 N (for M16). 13DIN EN ISO 898-1:2013-05 EN ISO 898-1:2013 (E) Table 5 Proof
38、loads ISO metric coarse pitch thread Property class 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9/12.9Threada d Nominal stress area As,nomb mm2Proof load, Fp(As,nom Sp,nom), N M3 M3,5 M4 5,03 6,78 8,78 1 130 1 530 1 980 1 560 2 100 2 720 1 410 1 900 2 460 1 910 2 580 3 340 2 210 2 980 3 860 2 920 3 940 5 10
39、0 3 270 4 410 5 710 4 180 5 630 7 290 4 880 6 580 8 520 M5 M6 M7 14,2 20,1 28,9 3 200 4 520 6 500 4 400 6 230 8 960 3 980 5 630 8 090 5 400 7 640 11 000 6 250 8 840 12 700 8 230 11 600 16 800 9 230 13 100 18 800 11 800 16 700 24 000 13 800 19 500 28 000 M8 M10 M12 36,6 58 84,3 8 240c13 000c19 000 11
40、 400 18 000 26 100 10 200c16 200c23 600 13 900 22 000 32 000 16 100 25 500 37 100 21 200c33 700c48 900d23 800 37 700 54 800 30 400c48 100c70 000 35 500 56 300 81 800 M14 M16 M18 115 157 192 25 900 35 300 43 200 35 600 48 700 59 500 32 200 44 000 53 800 43 700 59 700 73 000 50 600 69 100 84 500 66 70
41、0d91 000d115 000 74 800 102 000 95 500 130 000 159 000 112 000152 000186 000 M20 M22 M24 245 303 353 55 100 68 200 79 400 76 000 93 900 109 000 68 600 84 800 98 800 93 100 115 000 134 000 108 000 133 000 155 000 147 000 182 000 212 000 203 000 252 000 293 000 238 000294 000342 000 M27 M30 M33 459 56
42、1 694 103 000 126 000 156 000 142 000 174 000 215 000 128 000 157 000 194 000 174 000 213 000 264 000 202 000 247 000 305 000 275 000 337 000 416 000 381 000 466 000 576 000 445 000544 000673 000 M36 M39 817 976 184 000 220 000 253 000 303 000 229 000 273 000 310 000 371 000 359 000 429 000 490 000
43、586 000 678 000 810 000 792 000947 000 aWhere no thread pitch is indicated in a thread designation, coarse pitch is specified. bTo calculate As,nom, see 9.1.6.1. cFor fasteners with thread tolerance 6az in accordance with ISO 965-4 subject to hot dip galvanizing, reduced values in accordance with IS
44、O 10684:2004, Annex A, apply. dFor structural bolting 50 700 N (for M12), 68 800 N (for M14) and 94 500 N (for M16). Table 6 Minimum ultimate tensile loads ISO metric fine pitch thread Property class 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9/12.9 Thread d P Nominal stress area As,noma mm2Minimum ultimat
45、e tensile load, Fm,min(As,nom Rm,min), N M81 M101,25 M101 39,2 61,2 64,5 15 700 24 500 25 800 16 500 25 700 27 100 19 600 30 600 32 300 20 400 31 800 33 500 23 500 36 700 38 700 31 360 49 000 51 600 35 300 55 100 58 100 40 80063 60067 10047 80074 70078 700M121,5 M121,25 M141,5 88,1 92,1 125 35 200 3
46、6 800 50 000 37 000 38 700 52 500 44 100 46 100 62 500 45 800 47 900 65 000 52 900 55 300 75 000 70 500 73 700 100 000 79 300 82 900 112 000 91 60095 800130 000107 000112 000152 000M161,5 M181,5 167 216 66 800 86 400 70 100 90 700 83 500 108 000 86 800 112 000 100 000130 000 134 000179 000 150 000 1
47、74 000225 000204 000264 000M201,5 M221,5 M242 272 333 384 109 000 133 000 154 000 114 000140 000161 000 136 000166 000192 000 141 000173 000200 000 163 000200 000230 000 226 000276 000319 000 283 000346 000399 000332 000406 000469 000M272 M302 M332 496 621 761 198 000 248 000 304 000 208 000261 0003
48、20 000 248 000310 000380 000 258 000323 000396 000 298 000373 000457 000 412 000515 000632 000 516 000646 000791 000605 000758 000928 000M363 M393 865 1 030 346 000 412 000 363 000433 000 432 000515 000 450 000536 000 519 000618 000 718 000855 000 900 0001 070 0001 055 0001 260 000a To calculate As,
49、nom, see 9.1.6.1. 14DIN EN ISO 898-1:2013-05 EN ISO 898-1:2013 (E) Table 7 Proof loads ISO metric fine pitch thread Property class 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9/12.9Thread d P Nominal stress area As,noma mm2Proof load, Fp(As,nom Sp,nom), N M81 M101,25 M101 39,2 61,2 64,5 8 820 13 800 14 500 12 200 19 000 20 000 11 000 17 100 18 100 14
