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Tiêu chuẩn kỹ thuật của mỹ về bu lông, đai ốc astm a325, a490.
Bolts & Nuts Sdn Bhd 171-175, JALAN SAN PENG, 55200 KUALA LUMPUR TEL: 03-2218211 {6 LINES), 03-2217122 (6 LINES) FAX NO: 03-2210724, 03-2210807 AANA PRAR ABR Syarikat Central =D ARBRE S MSIE Specialists in High Tensile Botts & Mute % Othar F^stanarn, CONTENTS — = Chemical Requirements 3-1 Chemicalrequirements for A325 bolts 3-2 Chemical requirements for A490 bolls 3-3 Chemical requirements for Nufs 3-4 Chemical requirements for Washers Mechanical 4-] beeen cence eee eens Requirements Mechanical properties of bolts " eee een eee 4-1-1 Tensile requirernents for Full Size Bolts 4-1-2 Tensile requirements for Specimens Machined from Bolts 4-1-3 Hardness of bolts 2.0.0.0 00 e eee eee nee 4-2 Mechanical properties of nuts 4-3 Hardness of washers "¬= " — Dimensions and Markings " 5-1 Dimensions of bolts, nuts and washers .- : Scope High strength bolts for structural steel joints in the ASTM and A490 Mitsuboshi Industries, Standard are specified in A325 - Ltd is the leading manufacturer of these high strength structural bolts with the most advanced facilities of production and quality control system in Japan Mitsuboshi’s A325 and A490 high strength bolts with NKYM brand, covering Type 1, Type and Type with size range, 1/2 to 1-1/2 in., are enjoying ever increasing reputation among engineering and architectural people in building and bridge construction home and abroad industries , Materials and Manufacture The steel for bolts, nuts and washers is made by the open-hearth, basic-oxygen, or electric furnace process Bolts, nuts and washers are heat treated under uniform conditions They are quenched in oil or in a suitable liquid and then tempered Threads of all bolts are rolled described in Table When the galvanized bolts are specified, the bolts are hot dip zinc coated in accordance with the requirements for Class C of ASTM A153 The suitable grades and surface finishes of nut and wahser for each type of bolt are as follows: Bolt Type - and and 2, 2, Galvanized Galvani F436 carbon A 563, , DH DH oror A194,A194, 2H, , Galvani Galvanized steel for Type 1&2 bolts F436 and A563, C3 A490 Washer A563, C, Plain land 2, Plain A325 Nut grade and finish and 2, Plain A563, DH or A194, 2H, Plain weathering A563, DH3 Type : steel for om Table Conditions of heat treatment Bolt type Quenching Tempering A325 Type 860~900 WQ 470 ~ 530 WC A325 Type 850~900 WQ 470~ 530 WC A325 ‘Type 860~900 WQ 470 ~ 530 WC A490 Type1 830~ 880 OQ 530~ 600 WC A490 Type 850~900 WQ 380~450 WC A490 Type 860~900 WQ 480 ~ 530 WC Bolts, nuts and washers in Table to conform “ * Requirements Chemical to the requirements of chemical composition described 3-1 Chemical requirements for A325 bolts Table Chemical requirements for A325 bolts Bolt type Chemical composition (%) c Mn |} P max|S max 12) martensite stee!|~0.23 | [004] 905] na| Xa Note: Si Cu : _ Ni Cr _ {| Vmin | Bmin - | - | - | - | - |-0005 [255.990 Tons] one | 25, [ 889, |.295, | 259, [0m | - There are classes, A, B, C, D, E and F, of weathering steel in A325, Type and the above steel conforms to the Class C When specified, other class of weathering steel is specially available 3-2 Chemical requirements for A490 bolts Table Chemical requirements for A490 bolts T-t| | | Bolt type Cc Mn ]P max Saat te |r| Alloy steel | ĐU | |004|004| — T2 | marsaste deel| ~634| [004|005J ĐEN Note: mm - _ — orMo - |B |e =| -| -| - |.0005 IEaPiriEiEiEiEriF Thesteel for Type bolts shall contain sufficient alloying elements to qualify it as an alloy steel Carbon content for size 1-1/2 in of Type is in 0.35 to 0.53 3-3 Chemical requirements for Nuts Table Chemical requirements for nuts Nut grad UE Brace Cc 0.55 max A563 - € 0.15 Chemical composition (%) Mn | Pmax | S max 0612 | - 01 _ Si - 015 | | 0.80 — Cu Ni Cr ụ - - - - 020 | 025 | 0430 | 0.020 A563 C3 | ~.o2z | ~ịa3s | 0035 | 9040 | ~o3o | ~0.50 | ~0.50 | ~0.50 | A563 DH3 | 020 | „ 0.53 040 0.046 ~ 0.050 020 | 0.60 ase3 DH | 220.) 96° | 0.040 | 0.050 A194 2H 0.40 — | 0040 | 0.050 020 | 0.20 | min - — - - _ 0.45 ~ - - — ~ — 3-4 Chemical requirements for Washers Table Chemical requirements for washers Washer type F436 F436 Note: Carbon steel Weathering steel P max S max Chemical composition (%) Si Cr Ni Cu 0.040 0.050 — _ _ = 0.040 0.050 |0.15~ 0.30] 0.45 ~ 0.65] 0.25 ~ 0.45| 0.25 ~ 0.45 Weathering steel washers may also be manufactured from the weathering steel described in Table Mechanical Requirements 4-1 Mechanical 4-1-1 properties of bolts: Tensile requirements for Full-Size Bolts Table Tensile requirements for Full Size Bolts Tensile Strength”, Ibf Bolt Size, Threads per | Stress Inch and Area; — Proof LoadP, Ibf Alternate Proof Length Measure- Yield Strength Load”, min, lbf | A490 A525 A490 A325 A490 A325 A490 C3 C-4 C5 C-6 C7 C-8 C9 C-10 - 17,050] 21,300 - 24,150} 12,050| 17,050) 13,050] 18,500 0.226 | 27,100] 33,900 - 38,400 | 19,200] 27,100| 20,500) 29,400 40,100 | 50,100 - 56,800 | 28,400] 40,100] 30,700] 43,400 ®- 9UNC | 0.462 | 55,450] 69,300 _ 78,550 | 39,250| 55,450| 42,500 | 60,100 1- 8UNC | 0.606 | 72,700} 90,900 _ 103,000| 51,500| 72,700} 55,750 | 78,800 1⁄4- JUNC | 0.763 | 80,100 | 114,450 - 129,700 | 56,450] 91,550] 61,800] 99,200 1%- 8UN 0.790 ; 82,950 | 118,500 = 134,300 | 58,450] 94,800} 64,000 | 102,700 1⁄4 TUNC | 0.969 | 101,700 | 145,350 - 164,750 | 71,700 | 116,300 | 78,500 | 126,000 1%4- 8UN 1.000 | 105,000 | 150,000 _ 170,000 | 74,000 | 120,000} 81,000 | 130,000 1%- 6UNC | 1.155 | 121,300 | 173,250 - 196,350 | 85,450 | 138,600 | 93,550 | 150,200 1%- 8UN 1/233 | 129,500 | 185,000 _ 209,600 | 91,250 | 148,000 | 99,870 ¡ 160,300 1%- 6UNC | 1.405 | 147,500 | 210,750 - 238,850 | 104,000 | 168,600 | 113,800 | 182,600 14- 8UN 1.492 | 156,700 | 223,800 = 253,650 | 110,400 | 175,050 %-11UNC | | %-10UNC | - a) | 0.334 | 120,850 , %-13UNC | 0.142 | | Method ment Method ° A325 C2 Column Max Min, in Series Designation | : ee 194,000 The stress area is calculated as follows: As = 0.7854 [D — (0.9743/n)]? where: -* b) D n =nominal bolt size = threads per inch ~ Loads tabulated are based on the following Bolt size ⁄ As =stress area, in? c3 1⁄2 to 1inel | 120,000 psi 11⁄4 to 11⁄2 | 105,000 psi C-4 C-6 150,000 psi | 170,000 psi C-7 85,000 psi 74, 000 psi C-8 co 92,000 psi " 120,000 psi ———-— 81,000 psi| Cc-10 130,000 psi | ] | Tensile requirements for Specimens Machined from Bolts 4-1-2 Table : max Yield strength | (0.2 % Offset) + + psi Tensile strength, psi Grade and bolt size, In > over 1-1/4 105,000 — 81,000 14 35 A490 1/2 to 1-1/2 150,000 170,000 130,000 14 40 ị : Hardness of Bolts Hardness requirements for Bolts Table Hardness Number Grade and bolt max 1/2 tol 248 331 24 ' | A325 1-1/8 to 1-1/2 223 293 19 1/2 to 1-1/2 311 352 33 A490 Ị max min, m ' Rockwell C Brinell size, | Reduction of Area, „ % A325 4-1-3 ị Elongation in in or 50 mm, % i 35 - 31 | 38 ị i ; 4-2 Mechanical properties of nuts i | Proof load and Hardness requirements for Nuts Table Grade Nominal nut of size, in Nut Hardness Proof load stress, ksi Non-galvanized nuts Rockwell Brinell ‹ Galvanized max max A563 C 1/2 to 1-1/2 144 144 143 352 B78 C38 A563 C3 1/2 to 1-1/2 144 1444 143 352 B78 C38 A563 DH3 | 1/2 to 1-1/2 175 175 248 352 C24 C38 A563 DH 1/2 to 1-1/2 175 175 248 352 C24 C38 A194 2H 1/2 to 1-1/2 175 175 248 352 C24 C38 4-3 Hardness of washers Table 10 Hardness requirements for Washers Rockwell C Finish max Non-galvanized 38 45 Galvanized 26 45 _ 5, Dimensions and Markings 5-1 Dimensions of bolts, nuts, and washers Fig en - t - - - Shapes and dimensions of bolts, nuts and washers conform to the dimensional requirements of heavy hex structural boltings described in Table 11 Threads are the Unified Coarse Thread Series as specified in ANSI B 1.1 and have Class 2A tolerances When specified, pitch thread series may be used on bolts over in in diameter Tolerances on the nominal length of the bolts are as follows Nom bolt size Nom bolt length 3/4 tol 5/8 1/2 1-1/8 to 1-1/2 tolerance on length thru in —0.12 „ —0.12 —0.19 —0.25 over in "0.19 — 0.25 —- 0.25 — 0,25 5-2 Markings Markings for NK YM’s high strength bolts, nuts and washers are as shown in Fig to Fig Bolts A325 ` Type Type Type Type p49 Lens Fig Fig Washers Nuts AS63C A563 C3 A194 2H A563 DH3 For T-1, For T-3 1/2 5/8 3/4 7/8 1-1/8 1-1/4 1-3/8 1-1/2 0.515 0.642 0.768 0.895 1.022 1.149 1.277 1.404 1.531 0.482 0.605 0.729 0.852 0.976 1.098 1.223 1.345 0.875 1.062 1.250 1.438 1.625 1.812 2.000 2.188 2.375 0.850 1.031 1.212 1.394 1.575 1.756 1.938 2.119 2.300 max 1,010 1.227 1.443 1.660 1.876 2.093 2.309 2.526 2.742 0.969 1.175 1.383 1.589 1.796 2.002 2.209 2.416 2.622 max | 0.323 0.403 0.480 - 0.563 0.627 0.718 0.813 0.878 0.974 0.302 0.378 0.455 0.531 0.591 0.658 0.749 0.810 0.902 max 0.031 0.062 0.062 0.062 0.093 0.093 0.093 0.093 0.093 0.009 0.021 0.021 0.031 0.062 0.062 0.062 0.062 0.062 1.507 1.75 2.00 2.00 2.25 2.25 0.31 0.34 0.38 0,44 9.44 max | ® max | ® ° Bott H ® Lt] 1.470 1.00 1.25 1.38 Y | max | 0.19 0.22 0.25 0,875 1.062 1,250 1.438 1.625 1.812 2.000 2.188 2.375 0.850 1,031 1,212 1.394 1.575 1.756 1,938 2.119 2.300 max 1.010 1.227 1.443 1.660 1,876 2.093 2.309 2,526 2.742 0.969 1.175 1.382 1.589 1,796 2.002 2.209 2,416 2.622 max | 0.504 0.631 0.758 0.885 1.012 1,139 1.251 1.378 1.505 0.464 0.587 0.710 0.833 0.956 1.079 1.187 1.310 1.433 D}nom.| 1.063 1313 | 1.469 1./7ã40%| 2.000 2.250 2.500 2.750 3.000 d|nom.| 0.531 0.688 0.813 0.938 1.125 1.250 1.375 1.500 1.625 0,177 0.177 0.177 0.177 0.177 0.177 0.177 0.177 0.177 0,097 0.122 0.122 0.136 0.136 0.136 0.136 0.136 0.136 ® ° , Washer -| basic | max | Nat unit: inch max | ‘ 0.28 + _— Dimensions of bolts, nuts and washers L—— Table 11 " Weights of ASTM A325 and A490 heavy hex structural bolts with heavy hex nuts (Approximate weight of 100 steel bolts and nuts) Diameter | (2 (Inches) Length (nches) wl56] 1/2 kg ve 5/8 Ib | kg | ib | 2k 3/4 kg 1b kg | 1-1/4 1-1/2 13/4 x0 5H OS 3= 2-1/4 2-1/2 23/4 9.3%) 10,6 | 11,2 | 11.8; 21.9|17.0|32.4|26.5| 23.3 | 18.1 | 39.8 | 27.9] 24.7 | 18.9) 41.7 | 29.3 | 26.1} 19.9] 43.9 | 30.8 | aS GO 4C 3-1/4 3-1/2 3-34 12.4 | 13.1 | 13.7 | 14.3 | 27.4 28.8 30.2 31.6 100 /0X AE” 120 4-14 4-1/2 4-3/4 45.0 15.6 16.2 16,8 | | | | 33.0) 34.3 | 35.7 | 37.1 | 2s 13 5-1/4 ;ựo 5-1/2 lực S34 17.5 18.1 48.7 19.3 | | | | 38.5 | 28.7 | 63.3 | 43.5 | 95.8| 39.9 | 29.7| 65.5 | 44.9 | 98.9) 41.2|30.7| 67.7|46.3|102 42.6 | 31.7; 69.8} 47.6 105 ISD 6-1/4 6-1/2 6-3/4 20.0 | 44.0 | 20.6 | 45.4 | 21,21 46.8) 21.8 | 48.1 | 32.6 | 71.9|49.0|108 33.6] 74.1) 50.3 J111 34.6) 76.3) 51.7/114 35.6 | 78.5 | 53.5 |118 7-14 7-1/2 7-3/4 22.5 23.1 23.7 24.3 | | | | 49.5 50.9 52.3 53.6 | | | | 36.6 37.6 38.5 39.5 | | | | 80.6 | 54.9|121 |77.6|171 82.8|56.2|124 |79.4|174 84.9 | 57.6 [127 | 81.2/179 87.1 | $9.0 }130 | 83.0 /183 8-1/4 8-1/2 8-3/4 24.9 | 25.6 | 26.2 | 26.8 | 27.4 | 55.0 $6.4 57.8 59.1 60.5 | | | | | 40.5 41.5 42.4 43.4 44.4| | | | | 89.2 | 60.3 1133 91.4 | 61.7|136 93.5 | 63.1 ]139 95.7] 64.4 |142 97.8|65.8|145 NUT Per inch additional add For each 100 plain round washers add | | | | 21.3) 47.0) 22.5 | 49.6} 23.7 52.2] 25.1 | 55.3| lb X 3B 38 4€ 745 | 16.5 | 13.3 29.4) 8.1] 17.8] 14.1] 31.1 | 8.7 | 19.2 115.0] 33.1 | 9.3 | 20.5 | 16.0|.35.3 | zƑ 7/8kg 1-1/8 lb kg 1-1/4 Ib kg 1-3/8 Ib kg 1-1/2 Ib kg Ib — _ 33.7] 74.4] 35.4 | 78.0] 37.B4^81.9| _ _ — ~ 47.2;104 _ — ~ 49.4109 | 67.1/148 | 89.4|197 51.7|114 | 69.9]154 | 93.0 205 _ _ — _ |118.4)261 _ _ _ _ |151.0|333 39.1 | 86.1| 41.0} 90.3] 42.9] 94.6] 44.8; 98.8] 54.0l119 56.2/124 s9.0/130 61.2/135 20.9) 46.1 (32.2 | 70.9) 21.9} 48.2; 33.6] 74.0| 22.9 | 50.4 | 35.0 | 77.1] 23.8 | 52.5 | 36.44 80.2] j122.5|270 |126.6/279 j131.5|290 |136.1/300 j156.0|344 |161.0/355 J166.0|366 |171.9]379 46.7|103 48.5107 50.3 [111 52.6|116 | | | | 64.0]141 85.3|188 66.2|146 | 88.5]195 68.5]151 91.6202 71.2157 | 94.8|209 |111.6/246 (115.7 255 |119.3|263 {123.4 272 24.8] 25.8 | 26.8} 27.8 | |140.6|310 |145.61321 |150.6|332 |155.11342 |177.4|391 |182.8/403 |188.7|416 |194.11428 54.4 ]120 56.2|124 58.1/128 60.3133 | | | | 73.5]162 | 98.0/216 76.2/168 !101.2/223 78.5|173 |104.3/230 812|179 |107.5]237 1127.0 [131.1 |135.2 {138.8 280 289 298 306 |160.1|353 |164.71363 |169.6|374 |174.2/384 |200.0|441 |205.5{453 |210.9]465 |216.8|478 83.5]184 86.2|190 88.9|196 91.2|201 |110.7|244 |113.9]251 j117.0/258 |120.2|265 |142.9 315 |147.0|324 |150.61332 |154.7|341 |179.2|395 |183.7/405 188.7/416 193.2}426 |222.3|490 |228.2|503 J233.6|515 |239.0Ì527 69.9 |154 | 93.9;207 71.7]158 | 96.2|212 73.9/163 | 98.91218 75.8|167 |101.2|223 1123.3/272 |126.6/279 |129.7l286 |132.9|293 |158.3|349 |162.4/358 |166.5]367 |170.1/375 198.2|437 |202.8 447 [207.71458 |212.3Ì468 |244.9|540 |250,4;552 256.3|565 261.7|577 |103.9|229 |106.1|234 |108.9/240 |111.6|246 |136.1/300 |139.3|307 [142.4314 |145.6/321 |174.2|384 |177.81392 |181.9|401 |186.0/410 |217.3|479 |221.8|489 |226.8|500 [231.3/510 267:2|589 [273.1 602 278.5|614 284.0|626 HI3.9|251 |116.6/257 (118.8l262 {121.6]268 |123.8|273 |148.8|328 |452.01335 |155.1|342 |158.3|349 |161.5|356 |J1896l418 1193.7/427 |197.31435 |201.4/444 |205.5}453 |2363|521 j240.91531 |245.9|542 |250.4|552 |255.4|563 [289.9 639 2953651 [301.2 664 306.6 |676 1312.5 689 38.4| 61.6] 64.71 67.8] 94.7 | 37.8] 83.3] 56.9 | 39.2 | 86.4| 59.0} 40.6; 89.5] 61.2 | 42.0] 92.7] | | | | | | | | 62.1 |137 | 64.0 |141 |66.2|146 | |68.0|150 | |84.8|187 87.1 ]192 88.9196 90.2 |200 92.5 |204 | 72.6160 | 96.2 212 | 75.8|167 | 99.8 220 | 78.9/174 |103.9 229 | 82.1181 {107.5 237 3.0 / 6.54] 5.4} 11.9/ 8.8) 19.3; 13.5) 29.7] 19.3] 42.5] 25{ $5) 3.9} 86] 5.6} 1241 7.7) 16,9] 10.0] 22.1] 12.7] 1.7] 3.8) 24] 5.3} 3.6] 7.9) 5.2] 11.5] 65] 14.4) 24.9 | 10.8) 23.8] 10.3} 2261 9.5} 21.0} 8.7] 19.21 26.9 | 59.2] 35.7) 78.6] 46.31102.0| 59.4 131.0 28.0} 15.6) 34.4] 19.3] 42.5] 22.5 49.7 7.8] 17.21 9.4] 20.8) 123 27.1) 14.4; 31.8 15.4] 34.0] 14.3] 31.6] — — - ~ r For each 100 beveled square washers add 41.3} „ HIBN STRENGTH HEXAGON BOLTS JIS B1186 ˆ FO a ny a ne ee Pe HE HAT $ UE .j- Syarikat Central Bolts & Nuts Sdn Bhd 171-175, JALAN SAN PENG, 55200 KUALA LUMPUR TEL NO: 03-2218211 (4 LINES), 03-2217122 (4 LINES) FAX NO: 03-2210724, 03-2210807 we = Scope Japanese Industrial Standard B 1186 specifies the sets of high strength hexagon bolts, hexagon nuts and plain washers mainly used for friction _ grip joints of steel structures, Misuboshi Industries, Ltd producing these strength bolts branded high has rich bolts experiences of over 25 since the high 1957 as NKYM and years : su in strength ¬ are enjoying ever increasing Teputation among engineering and architectural people in building and bridge construction industries The set shall be composed of one high strength hexagon bolt, one high strength hexagon nut and two high strength plain washer - Classes and Grades The Classes in combination with the grades according to mechanical properties of the constituting parts shall be as given in Table Tabie Nà : Classification of set Class according to Class (Class 3) torque coefficient : Class Applicable grade according to mechanical properties of constituting parts Class according to mechanical properties A Nut F8T F10 (F8) ` A ` FI0T B : Bolt B A B (F11T) Washer ~ hen Remark: Those which are given in parentheses should not apply as far as possible * F35 F10 lot ca CONTENTS na Classes and Grades Material Q.22 122222 nho Mechanical Properties th nh ng 4-1 Com ee ee 4-1-1 fT tat 4-1-2 ° 4-2 4-3 xxx s Mechanical Properties of Bolt wi Mechanical Properties of Test-Piece Machined from Bolt Mechanical Properties of Full Size Bolt Mechanical Properties of Nut Preece eee eens 14 Hardness of Washer © 000 00 e eee Torque Coefficient of Set Shape and Dimensions 6-1 6-2 6-3 High Strength Hexagon Bolts for Friction Grip Joints High Strength Hexagon Nuts for Frict ion Grip Joints High Strength Plain Washers for Friction Grip Joints 7, Screw Threads Reece Marking ccc Weights of a set of High Strength Bolt, = eee cevaae “28 cece ¬ Nut and two Plain Washers .!+ Material The material for bolts, Nuts and Washers shall be such that the products comply with the mechanical requirements of Mitsuboshi Industries, Ltd uses several kinds of steel described in’ Table 2, which were specially produced by the high level controlled furnace of Nippon Kokan K.K and Nakayama Steel Works, Ltd for high strength bolts, nuts and washers These steels have a best heat-treatability and a good durability against delayed fracture of the bolts ' Table 2, Chemical requirements for high strength Bolts, Nuts and Washers Classification and Grade ‘ Bolt Designation | Marking Low carbon ) Œ§T or F10T) | martensite steel HS22B0| 22 Low carbon }Hs20BH} iD s Low carbon Bolt (F10T or F11T) | martensite steel Medium Nut HS20BF| (Œ10) carbon steel 534C Washer (F35) Medium carbon steel S45C Remark: Chemical composition (%) * Cc Si 0.20 | 0.10 | 0.80 025 | 030 ~ |'1.10 |10.030|0.030| 0.18 | 0.10 ~| ~| ~ | 0.70 |0030|0030| 0.18 | 0.10 | 0.70 ~ ~ ~ 0.22 | 030 | 0.90 |0.020|0.030| ~ ~ 0.22 | 0.30 | 0.90 0.30 | 0.15 | 0.60 ` ` ~ 0.36 | 0.35 | 0.90 0.42 0.15 Cr Mn | Pmax[|Smax| 0.60 | 0,030 0.035) 0030 0.035; - 0.48 | 0.35 | 0.90 |, |Cumax|Nimax} 0.25 ~ | °|:0.20 | 0.20 0.45 B [0.0005 9.60 ~ | 0.20 | 0.20 [0.0005 0.80 0.90 ~ | 1.10 , 0.20 | 0.20 |0.0005 — ~ 7 — _ _ _ Selection of steel for high strength bolts depends upon the grade and size of bolt produced 4 Mechanical Properties 4-1, Mechanical Properties of Bolt be per 4-1-1 Mechanical properties of Test Piece Machined from Bolt A Table i according Grademechanical Proof stress kgflmm2 strength Tensile kgf/mm? properties of bolt (N/mm?)* (N/mm?)* 64 (627.6 min.) (784.5 to 980.7) (882.6 min.) to i | F8T 80toi00 95 * 16 45 (980.7 to 1176.8) 14 min, 40 110 to 130 14 min, ; ; (931.6 min.) "| (1078.7 to 1274.9) FUT : Reduction of area ° 100 to 120 90 F10T : Elongation : 40 Note* 1N/mm? = MPa i soe The impact value is tested when required by customer “es s + Mechanical Properties of Full-Size Bolt / 41-2, —.- Table , Grade according Designation of screw threads Hardness FST (66.1) | 123.6) | (492.2) | (237.3) | (276.6) | 4599) | 440.3) to 31 HRCI18 F10T (82.67) | (154.0) | (240.3) | (297.1) | 46.2) | 450.1) | (550.2) HRC27 to 38 to mechanical properties ofbolt [ MỊ2 | M16 | M20 | M22.| 6740 | 12600 | 19600 | 24200'| RIT Remark: | Tensile load (min.) (kgf) (KN) M24 | M27 | M30 28200 | 36700 | 44900 8430 | 15700 | 24500 | 30300 | 35300 | 45900 | 56100 9270 | 17300 | 27000 | 33300 | 38800-| : 50500 | 61700 | mc3o:o40 (90.91) | (169.7) | (264.8) | (326.5) | (380.5) | (495.3) | (605.1) subject to For the bolt which has been subjected to the tension test, the hardness test may be omitted, the customer’s requirement 4-2 Mechanical Properties of Nut Table Grade according to mechanical properties of nut Hardness Min, Max F HR B85 HRB100 F10 HR B9S HRC Guaranteed load Same as the tensile load (min.) of bolt specified in Table 4, 35 4-3 Hardness of Washer Table Grade according to mechanical properties of washer F3 ae HRC35 to 45 + » Hardness Torque Coefficient of Set Table ; Class of set according to torque coefficient Division A’ Mean of torque coefficient values of one manufacturing lot (2) 0.110 to 0.150 : Standard deviation of torque coefficient values of one manufacturing lot (2) B > ` 0.150 to 0.190 0.010 niax : 0.013 max The torque coefficient shall be obtained from the following formula: where K= T axNn x 1000 K: " torque coefficient T an torque (moment tofasten nut) (ket: -m) (N-m) d: basic thread outside diameter of bolt (mm) N: axial force of bolt (1) (kgf) (N) os - Notes:~ (1) The axial force mentioned above means a tensile force to act in axial direction of the bolt caused by (2) a torque to fasten the bolt The one manufacturing lot mentioned above means the lot of set which the bolt, nut and washers of each identical lot constitute 6 Shape and Dimensions 6-1, High Strength Hexagon Bolts for Friction Grip Joints Eccentricity Inclination of of head Inclination bearing face of side face F, `) Designation! threads(d) Basi dị asic : Basi ‘es | M20 | 20 +'| M22 | 22 10 M30 | 30 14 ]e Tp ˆ TP, K Cc r 40.9 Loz] 27 o [254] ~0.8 312] 20 | 20) RS 37 | 30 | 29 | L2t9 36 41.6 | 34 | 33 4i | D70 , 08 138v 46 s31| 44} 43] 19 | +10 | 50 517] 48 |41|2940| J 3$ Basic dimen Toler | 46 30 - 35 afr | ¬= 24 kh 09 Olas 39 25 | 25 32 Unit: mm |ab|E|F Approx.| Max | Max Max 0.8 to 1472| Basic dimension [Odi , 40 4s | +6l6 13 30 |1 55 ! 30] 35] 40 | 45] 50] 55] 60} 65| 70] 75] 80| 85] 90] 95 l1ool105]11011151120 Tolerance on / +1.0 ` +14 I Baicdimemion Tolerance on] oa +0, 13 M24 | 24 | +0.8 8# | ts M27 | 27 17 Remark: B- dimen- Toler- dimen- Toler simen- Toler- Approx.|Approx.| Min |12 | oy] mis | 16 -Ì~0.2 re Basi asic M2 a H - [125]130[135)149]145[150|155[160[165]1 70]175]180]190]200)210|220 +18 ‡ The screw end may be either of flat point or of oval point ro s* a Table 6-2 High Strength Hexagon Nuts for Fric tion Grip Joints Eccentricity of boit hole 50s s 2, II, Ñ TW -— oya Ẳ 50S | % 30° | af, H ~f Td Inclination of side face b op œ Inclination of bearing face LLz Table Unit: mm Designation | Outside of screw | diameter of threads (d) > ve H external , Basic threads | dimens ion B Cc D Approx Approx.| 25.4 20 20 [ 0.7 31.2 25 25 | 0.8 32 37 30 36 0.9 416 | 34 | 33) 11] 47.3 39 38 1.2 Tolerance , Basic dimension, Tolerance| D, | ab 12 12 M16 16 16 M20 20 20 M22 22 22 M24 24 24 M27 27 27 46 53.1 44 43 13 M30 30 30 30 317 48 47 LS Remark: 22 bs 27 +0.4 ` 41 + F h Min | Max | Max, | Max M12 £0.35 # a, a | 2° | 420 Chamfering of the threaded portion of nut bearin g face side shall be of 1.0 to 1.05 din diameter 6-3 High Strength Plain Washers for Friction Grip Joints Table 10 d Designation of + Remark: f washer Unit: mm s din 12 13 16 17 20 21 22 23 24 25 27 28 30 31 on tae Tolerance di Basic’ b corr Tolerance =- 32 7“ 40 40.8 * 44 -1 o yr 4g 119 QO > ‡ 56 60 ~ 12 ie 26 18.7 >+ 3.2 +0.4 4.5 i 30,5 a “| Tolerance | ` +0.7 Approx 15 ` 24 an 2.8 The above figures show a plain washer with 45° chamfer and that with radius r, and either chamf er or tadius to be used is optional + , - Screw Threads screw threads of the bolts and nuts shall be metric coarse screw H/6 g threads specified in JIS B 0205, and their grade shall be of The ‘ specified in JIS B 0209 The screw threads of the bolts shall have been made by thread rolling Marking All bolts shall be marked with notation (F8T, F10T class ing the to mechanical properties tion mark of manufactuer on the All nuts shall be marked on one circumferential lines according In case of Mitsuboshi Industries, of bolt and identifica- top of the bold head face with two or three equally spaced to mechanical properties of the nut Ltd., the markings are as described in ', : „„.Table 11 Table 11 Bolt ị F10 F8 Nut Nut a Ye N F10T ZZ according or F11T) designat- | _ 9, Weights of a set of Hig h Strength Bolt, Nut- and two Plain Washers › Fe coer a (Approximate weight of 100 sets of bolts, nuts and washers) Unit: kes and pounds length diameter 30 35 : 40 45 50 55 ` 60 65 70 75 80 85 90 , 95 100 “105 7-1109 115 120 125 130 135 140 » 145 150 155 160 165 170 175 180 190 200 210 220 Remark: M12 kg | Ib | 9.8 | 21.6 10.3 | 22.7 10.7 | 23.6 | 11.2 | 24.7 | 11.6 | 25.6 | 12.1 | 26.7 | 12.5 | 27.6 | 13.0 | 28.7 M16 kø | Ib | 20.2 | 21.0 21.7 | 22.5 | 23.3 | |.24.1 | 24.9: | 25.7 | 26.5 | 27.3 | 28.1 | 28.9 | 29.6 | 44.5 |46.3 47.8 49.6 51.4 53.1 54.9 56.7 58.4 60.2 61.9 63.7 65.3 - M20 kg | | 34.8 | | 36.1,) | 37.3 | |38.5 | | 39.8 | | 41.0 | | 42.2 | | 43.5 | | 44.7 | | 45.9 | | 47.2 | 48.4 49.6 | 50.9 52.1 | 53.3 | : Ib | M22 kg | Ib | 76.7 79.6|.49.6 |109.3 82.2] 51.0 |112.4 84.9] 52.5 |115.7] 87.7] 54.0:}119.0] 90.4} 55.5 |122.4| 93.0] 57.0 |125.7| 95.9} 58.5 |129.0| 98.5] 60.0 [132.3] 101.2] 61.5 | 135.6] |104.1| 63.0 | 138.9] |106.7| 64.5 | 142.2| 109.3] 65.9 }145.3] |112.2| 67.4 |148.6| 114.9} 68.9 [151.9] 117.5} 70.4 [155.2] 71.9 |158.5| 73.4 |161.8| 74.9 1165.1} 76.4 |168.4| 779 |171.7| 79.4 175,0 | 80.8 | 178.1 | 82.3 | 181.4] ~ ~ M24 ke ] M27 kg | b | Ib | 68.3 |150.6 70.1 | 154.5 71.9] 158.5] 73.7 | 162.5 | 75.4] 166.2 | 77.2] 170.2 | 79.0] 174.2 | 80.8] 178.1 82.5] 181.9 | 84:3] 185.8 | 86.1 | 189.8 | 87.9 | 193.8 | 89.6 | 197.5 | 91.4|201.5 93.2|205.5 95.0| 209.4 | 96.7 | 213.2 | 98.5 | 217.2 | 100.3 | 221.1 | 102.1 | 225.1 | 103.8 | 228.8 | 1105.6 | 232.8 | 107.4 | 236.8 | {109.2 | 240.7 | 110.9 | 244.5 | : ° M30 kg | b oye 99.9 }220.2| 131.9 | 290.8 10%3.| 225.3 | 134.7 | 297.0 104.5 {230.4 | 137.5 | 303.1 106.8 [235.5 | 140.3 | 309.3 109.1 {240.5 | 143.1 | 315.5 [111.4 [245.6 | 145.9 | 321.7 113.7 [250.7 | 148.7 | 327.8 116.0 |255.7} 151.5 | 334.0 118.3 | 260.8 | 154.3 | 340.2 120.6 | 265.9 [157.1 | 346.3 122.9 | 270.9 | 159.9 | 352.5 |125.2 |276.0 | 162.7 | 358.7 ]127.5 |281.1 |165.5 | 364.9 129.8 | 286.2 | 168.3 |371.0 132.1 |291.2| 171.1 | 377.2 134.4 | 296.3 | 173.9 | 383 136.7 |301.4 | 176.7 | 389.6 139.0 [306.4 | 179.5 | 395.7 141.3 |311.5 | 182.3 | 401.9 143.6 1316.6 | 185.1 | 408.1 145.9 {321.7 | 187.9 | 414.2 148.2 {326.7 | 190.7 | 420.4 150.5 | 331.8 | 193.5 | 426.6 153.1 }341.9 1199.1 | 438.9 [159.7 1352.1 | 204.7 | 4513 | , | 210.3 | 463.6 215.9 | 476.0 The dimensions of which weights are given in the table indicate the recommended lengths GH STRENGTH FRICTION GRIP EXAGON BOLTS ‘Aaterials and Dimensions to BS 4395 Part Threaded Form in accordance with BS 3643 coarse pitch series medium class fit 6g Bolts are identified as High Strength by |edial lines 120° apart embossed on the head of the bolt Hexagon nuts to BS 4395 refer to page - fd RadR, Dimensions in millimetres i B Diameter of unthreaded D Đìcnunal shank i= max 12:70 16-70 20-81 22-84 24-84 27-84 39-61 34-01 37-0 i | | | | | | | | 11:39 15-30 18115 21-16 23-16 26-16 29-16 32-0 35-0 max} 22 27 32 35) 41 48 50 55 60 | | | | | | | | 21:16 25-16 31-00 35:00 40.00 45-00 49-09 53-60 58-20 Length of thread table BS 4395 Unto and including 125mm ' Ị Over 125mm Over 200mm mịn max 25-4 | 23-79 31-2 | 29-30 36-9 | 35-03 41-6 | 39-55 47⁄3 | 45:20 50-85 531 57-7 | 85-37 63-5 | 60-78 69-3 | 66-44 Part Length of thread Nominal iength cf belt i i c Width across corners A Width across flats up te and ineluding 200mm | max 22 27 32 36 41 46 50 55 60 | | | | | | | | | | H Radius under head K Denth of E Diameter of washer face washer face 19-91 24-91 29-75 33-75 3875 43-75 47-75 52-55 57-75 max | 1:00; 1001 1⁄2 1⁄2 1:2 1-5 1-8 1‹8 15 max 9-4 9-4 0á 04 0-5 0-5 95 05 05 max 8-45 10-45 13-80 14:90 16-90 17-80 20:05 2205 24:05 | | | | | | | of 7:85 9-E5 12:10 13:10 14.19 16-10 17-95 19:95 21-85 - Length of thread table BS 4395 Part Nominal length of bolt 2D : 6mm Upto and including 125mm 20-12mm Over 125m 2D ‹ 25mm mia 06 055 Q8 90-8 1-0 1:0 10 1-0 ` F Thickness head Over 200mrn Up to and ïncluding 290mm ar High strength friction grip bolts to BS 4395 Part Relates to the higher grade 10-9 for the sizes M16 to M33 inclusive 108 Bolts are identified as higher grade strength friction grip bolts by the marking Lenath of thread :12n1m 1mm 22mm : ... of bolts, nuts and washers .- : Scope High strength bolts for structural steel joints in the ASTM and A490 Mitsuboshi Industries, Standard are specified in A325 - Ltd is the leading manufacturer... 1-1/2 in., are enjoying ever increasing reputation among engineering and architectural people in building and bridge construction home and abroad industries , Materials and Manufacture The steel... specified, the bolts are hot dip zinc coated in accordance with the requirements for Class C of ASTM A153 The suitable grades and surface finishes of nut and wahser for each type of bolt are as