{"id":5705,"date":"2025-12-24T01:41:35","date_gmt":"2025-12-24T01:41:35","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5705"},"modified":"2025-12-24T01:41:35","modified_gmt":"2025-12-24T01:41:35","slug":"gb-t-3098-8-bolts-for-200c-to-700c-use","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/fr\/blog\/gb-t-3098-8-bolts-for-200c-to-700c-use\/","title":{"rendered":"Boulons GB\/T 3098.8 pour une utilisation de -200 \u00b0C \u00e0 +700 \u00b0C"},"content":{"rendered":"<div class=\"section\" style=\"background-color: #f9f9f9; padding: 20px; border-radius: 5px;\">\n<h2>Introduction \u00e0 la norme GB\/T 3098.8<\/h2>\n<p>Cette norme d\u00e9crit les propri\u00e9t\u00e9s m\u00e9caniques, les mat\u00e9riaux, l'inspection, l'identification et le marquage des pi\u00e8ces d'assemblage boulonn\u00e9es fonctionnant \u00e0 des temp\u00e9ratures extr\u00eames, de -200 \u00b0C \u00e0 +700 \u00b0C. Elle garantit la fiabilit\u00e9 des applications telles que les appareils \u00e0 pression, les chaudi\u00e8res et les machines \u00e0 haute temp\u00e9rature, et compl\u00e8te les normes comme GB\/T 3098.1, GB\/T 3098.6 et DIN EN 10269.<\/p>\n<\/div>\n<div class=\"section\">\n<h2>Port\u00e9e<\/h2>\n<p>La norme GB\/T 3098.8-2010 sp\u00e9cifie les exigences relatives aux fixations en aciers aust\u00e9nitiques pour les basses temp\u00e9ratures (jusqu'\u00e0 -200 \u00b0C) et en aciers\/alliages de nickel pour les hautes temp\u00e9ratures (jusqu'\u00e0 +700 \u00b0C). Elle couvre les classes de performance m\u00e9canique, les m\u00e9thodes d'essai et l'appariement des mat\u00e9riaux afin de garantir l'int\u00e9grit\u00e9 structurelle sous contraintes thermiques. Ceci est essentiel pour les industries exigeant une r\u00e9sistance au fluage, \u00e0 la relaxation et \u00e0 la rupture fragile.<\/p>\n<ul>\n<li>S'applique aux boulons, vis, goujons et \u00e9crous des assemblages boulonn\u00e9s.<\/li>\n<li>Con\u00e7u pour une capacit\u00e9 de charge maximale garantissant un fonctionnement s\u00fbr dans des environnements extr\u00eames.<\/li>\n<li>R\u00e9f\u00e9rences aux normes connexes pour une conformit\u00e9 compl\u00e8te.<\/li>\n<\/ul>\n<\/div>\n<div class=\"section\">\n<h2>Propri\u00e9t\u00e9s des mat\u00e9riaux et des m\u00e9canismes<\/h2>\n<p>Le choix des mat\u00e9riaux d\u00e9pend des plages de temp\u00e9ratures afin de garantir l'int\u00e9grit\u00e9 m\u00e9canique. \u00c0 basse temp\u00e9rature, les aciers aust\u00e9nitiques offrent une bonne ductilit\u00e9\u00a0; \u00e0 haute temp\u00e9rature, les aciers et les alliages de nickel assurent r\u00e9sistance et tenue au fluage. Les propri\u00e9t\u00e9s doivent satisfaire aux exigences sp\u00e9cifi\u00e9es en mati\u00e8re de duret\u00e9, de r\u00e9sistance \u00e0 la traction et de charge d'\u00e9preuve.<\/p>\n<h3 style=\"font-size: 18px; color: #555;\">Mat\u00e9riaux basse temp\u00e9rature<\/h3>\n<p>Le tableau 1 r\u00e9pertorie les groupes d'aciers aust\u00e9nitiques pour des temp\u00e9ratures minimales de service jusqu'\u00e0 -200 \u00b0C, avec leurs propri\u00e9t\u00e9s conformes aux normes GB\/T 3098.6 et GB\/T 3098.15. Teneur en cuivre \u2264 1%. Les temp\u00e9ratures sup\u00e9rieures sont sans incidence\u00a0; les temp\u00e9ratures inf\u00e9rieures n\u00e9cessitent des essais de performance sp\u00e9cifiques \u00e0 chaque condition.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th style=\"width: 55.2192%;\" rowspan=\"2\">Temp\u00e9rature minimale de fonctionnement continu (approximative)<\/th>\n<th style=\"width: 20.3549%;\" rowspan=\"2\">Groupe Steel<sup>un<\/sup><\/th>\n<th style=\"width: 23.3821%;\" colspan=\"2\">Niveau de performance<\/th>\n<\/tr>\n<tr>\n<th style=\"width: 13.4656%;\">Boulon<\/th>\n<th style=\"width: 9.91649%;\">Noix<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"width: 55.2192%;\" rowspan=\"3\">-60\u00b0C<sup>b<\/sup><\/td>\n<td style=\"width: 20.3549%;\">A2L<\/td>\n<td style=\"width: 13.4656%;\" rowspan=\"3\">50<\/td>\n<td style=\"width: 9.91649%;\" rowspan=\"2\">50<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.3549%;\">A2<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.3549%;\">A3<\/td>\n<td style=\"width: 9.91649%;\" rowspan=\"2\">70<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 55.2192%;\" rowspan=\"3\">-200\u00b0C<sup>c<\/sup><\/td>\n<td style=\"width: 20.3549%;\">A4L<\/td>\n<td style=\"width: 13.4656%;\" rowspan=\"3\">70<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.3549%;\">A4<\/td>\n<td style=\"width: 9.91649%;\" rowspan=\"2\">80<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.3549%;\">A5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><sup>un<\/sup> Teneur en cuivre \u22641% (selon GB\/T 3098.6 et GB\/T 3098.15).<br \/>\n<sup>b<\/sup> Boulons \u00e0 t\u00eate.<br \/>\n<sup>c<\/sup> Goujons.<\/p>\n<h3 style=\"font-size: 18px; color: #555;\">Mat\u00e9riaux haute temp\u00e9rature<\/h3>\n<p>Le tableau 2 sp\u00e9cifie les aciers et les alliages de nickel jusqu'\u00e0 +700 \u00b0C, avec des propri\u00e9t\u00e9s conformes au tableau 4 de la norme DIN EN 10269 pour le traitement thermique. Les donn\u00e9es de r\u00e9f\u00e9rence pour la limite d'\u00e9lasticit\u00e9, la r\u00e9sistance au fluage et la relaxation proviennent des tableaux 5, C.1 et D.1 de la norme DIN EN 10269. Ces donn\u00e9es concernent les t\u00f4les AD 2000-W2, W7, W10 et VdTUV.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th colspan=\"3\">Plage de temp\u00e9rature de fonctionnement selon DIN EN 10269<\/th>\n<th colspan=\"4\">Mat\u00e9riel<\/th>\n<th colspan=\"2\">Duret\u00e9\/HV des boulons et\/ou \u00e9crous<\/th>\n<\/tr>\n<tr>\n<th>min<\/th>\n<th>\u00e0 court terme<sup>un<\/sup> max<\/th>\n<th>\u00e0 long terme<sup>b<\/sup> max<\/th>\n<th>Abr\u00e9viation<\/th>\n<th>Nombre<\/th>\n<th>Grade<\/th>\n<th>Condition<\/th>\n<th>min<\/th>\n<th>max<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td rowspan=\"2\">-120\u00b0C<\/td>\n<td rowspan=\"2\">\/<\/td>\n<td rowspan=\"2\">\/<\/td>\n<td rowspan=\"2\">KB<\/td>\n<td rowspan=\"2\">1.568<\/td>\n<td rowspan=\"2\">X12Ni5<\/td>\n<td>+NT<\/td>\n<td>157<\/td>\n<td>203<\/td>\n<\/tr>\n<tr>\n<td>+QT<\/td>\n<td>173<\/td>\n<td>235<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>400 \u00b0C<\/td>\n<td>500 \u00b0C<\/td>\n<td>Yd<\/td>\n<td>1.1181<\/td>\n<td>C35E<\/td>\n<td>+N<\/td>\n<td>150<\/td>\n<td>200<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>400 \u00b0C<\/td>\n<td>500 \u00b0C<\/td>\n<td>YK<\/td>\n<td>1.1181<\/td>\n<td>C35E<\/td>\n<td>+QT<\/td>\n<td>165<\/td>\n<td>210<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>400 \u00b0C<\/td>\n<td>\/<\/td>\n<td>YB<\/td>\n<td>1.5511<\/td>\n<td>35B2<sup>g<\/sup><\/td>\n<td>+QT<\/td>\n<td>165<\/td>\n<td>210<\/td>\n<\/tr>\n<tr>\n<td>-60\u00b0C<\/td>\n<td>500 \u00b0C<\/td>\n<td>550 \u00b0C<\/td>\n<td>KG<\/td>\n<td>1.7218<\/td>\n<td>25CrMo4<\/td>\n<td>+QT<\/td>\n<td>195<\/td>\n<td>240<\/td>\n<\/tr>\n<tr>\n<td>-100\u00b0C<\/td>\n<td>500 \u00b0C<\/td>\n<td>\/<\/td>\n<td>GC<\/td>\n<td>1.7225<\/td>\n<td>42CrMo4<\/td>\n<td>+QT<\/td>\n<td>275<\/td>\n<td>337<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>500 \u00b0C<\/td>\n<td>550 \u00b0C<\/td>\n<td>G\u00e9orgie<\/td>\n<td>1.7709<\/td>\n<td>21CrMoV5-7<\/td>\n<td>+QT<\/td>\n<td>225<\/td>\n<td>272<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>600 \u00b0C<\/td>\n<td>550 \u00b0C<\/td>\n<td>GB<\/td>\n<td>1.7711<\/td>\n<td>40CrMoV46<\/td>\n<td>+QT<\/td>\n<td>272<\/td>\n<td>320<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>550 \u00b0C<\/td>\n<td>600 \u00b0C<\/td>\n<td>Ve<\/td>\n<td>1.4923<\/td>\n<td>X22CrMoV12-1<\/td>\n<td>+QT 1<sup>et<\/sup><\/td>\n<td>256<\/td>\n<td>303<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>550 \u00b0C<\/td>\n<td>600 \u00b0C<\/td>\n<td>VH<sup>f<\/sup><\/td>\n<td>1.4923<\/td>\n<td>X22CrMoV12-1<\/td>\n<td>+QT 2<sup>f<\/sup><\/td>\n<td>287<\/td>\n<td>367<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>600 \u00b0C<\/td>\n<td>600 \u00b0C<\/td>\n<td>VW<\/td>\n<td>1.4913<\/td>\n<td>X19CrMoNbVN11-1<\/td>\n<td>+QT<\/td>\n<td>287<\/td>\n<td>367<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>650 \u00b0C<\/td>\n<td>670 \u00b0C<\/td>\n<td>S<\/td>\n<td>1.4986<\/td>\n<td>X7CrNiMoBNb16-16<\/td>\n<td>+WW+P<\/td>\n<td>210<\/td>\n<td>272<\/td>\n<\/tr>\n<tr>\n<td>-196\u00b0C<\/td>\n<td>650 \u00b0C<\/td>\n<td>650 \u00b0C<\/td>\n<td>SD<\/td>\n<td>1.498<\/td>\n<td>X6NiCrTiMoVB25-15-2<\/td>\n<td>+AT+P<\/td>\n<td>287<\/td>\n<td>367<\/td>\n<\/tr>\n<tr>\n<td>-196\u00b0C<\/td>\n<td>650 \u00b0C<\/td>\n<td>800 \u00b0C<\/td>\n<td>SB<\/td>\n<td>2.4952<\/td>\n<td>NiCr20TiAl<\/td>\n<td>+AT+P<\/td>\n<td>320<\/td>\n<td>417<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><sup>un<\/sup> Limite de temp\u00e9rature pour la limite d'\u00e9lasticit\u00e9 et la r\u00e9sistance \u00e0 la traction.<br \/>\n<sup>b<\/sup> Limite de temp\u00e9rature pour la r\u00e9sistance au fluage et \u00e0 la rupture.<br \/>\n<sup>c<\/sup> Conditions selon DIN EN 10269 Tableau 4 : +N (normalis\u00e9), +NT (normalis\u00e9 et revenu), +QT (tremp\u00e9 et revenu), +WW (\u00e9croui \u00e0 chaud), +AT (recuit de solution), +P (durcissement par pr\u00e9cipitation).<br \/>\n<sup>d<\/sup> R\u00e9serv\u00e9 aux noix.<br \/>\n<sup>et<\/sup> V selon DIN EN 10269, Rp0,2 \u2265600 N\/mm\u00b2 (+QT1).<br \/>\n<sup>f<\/sup> VH selon DIN EN 10269, Rp0,2 \u2265600 N\/mm\u00b2 (+QT2).<br \/>\n<sup>g<\/sup> Voir VdTUV WB 490.<\/p>\n<\/div>\n<div class=\"section\">\n<h2>Capacit\u00e9s de charge<\/h2>\n<p>Les valeurs de charge garantissent que les fixations r\u00e9sistent aux contraintes op\u00e9rationnelles. \u00c0 utiliser pour la v\u00e9rification de la conception.<\/p>\n<h3 style=\"font-size: 18px; color: #555;\">Charges de traction minimales pour les boulons \u00e0 gros filetage<\/h3>\n<p>Tableau 4a : A<sub>s,nom<\/sub> \u00d7 R<sub>m,min<\/sub> \/kN<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th rowspan=\"3\">Taille du fil d<\/th>\n<th rowspan=\"3\">Zone de stress A<sub>s,nom<\/sub> \/mm\u00b2<\/th>\n<th colspan=\"2\">Acier inoxydable aust\u00e9nitique de qualit\u00e9<\/th>\n<th colspan=\"11\">Acier et alliages de nickel<\/th>\n<\/tr>\n<tr>\n<th rowspan=\"2\">50<\/th>\n<th rowspan=\"2\">70<\/th>\n<th rowspan=\"2\">KB<\/th>\n<th>YK<\/th>\n<th rowspan=\"2\">KG<\/th>\n<th rowspan=\"2\">G\u00e9orgie<\/th>\n<th rowspan=\"2\">GB<\/th>\n<th rowspan=\"2\">GC<\/th>\n<th rowspan=\"2\">V<\/th>\n<th>VH<\/th>\n<th rowspan=\"2\">S<\/th>\n<th rowspan=\"2\">SD<\/th>\n<th rowspan=\"2\">SB<\/th>\n<\/tr>\n<tr>\n<th>YB<\/th>\n<th>VW<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M3<\/td>\n<td>5.03<\/td>\n<td>2.52<\/td>\n<td>3.52<\/td>\n<td>2.67<\/td>\n<td>2.52<\/td>\n<td>3.02<\/td>\n<td>3.52<\/td>\n<td>4.28<\/td>\n<td>4.33<\/td>\n<td>4.02<\/td>\n<td>4.53<\/td>\n<td>3.27<\/td>\n<td>4.53<\/td>\n<td>5.03<\/td>\n<\/tr>\n<tr>\n<td>M3.5<\/td>\n<td>6.78<\/td>\n<td>3.39<\/td>\n<td>4.75<\/td>\n<td>3.59<\/td>\n<td>3.39<\/td>\n<td>4.07<\/td>\n<td>4.75<\/td>\n<td>5.76<\/td>\n<td>5.83<\/td>\n<td>5.42<\/td>\n<td>6.1<\/td>\n<td>4.41<\/td>\n<td>6.1<\/td>\n<td>6.78<\/td>\n<\/tr>\n<tr>\n<td>M4<\/td>\n<td>8.78<\/td>\n<td>4.39<\/td>\n<td>6.15<\/td>\n<td>4.65<\/td>\n<td>4.39<\/td>\n<td>5.27<\/td>\n<td>6.15<\/td>\n<td>7.46<\/td>\n<td>7.55<\/td>\n<td>7.02<\/td>\n<td>7.9<\/td>\n<td>5.71<\/td>\n<td>7.9<\/td>\n<td>8.78<\/td>\n<\/tr>\n<tr>\n<td>M5<\/td>\n<td>14.2<\/td>\n<td>7.1<\/td>\n<td>9.94<\/td>\n<td>7.53<\/td>\n<td>7.1<\/td>\n<td>8.52<\/td>\n<td>9.94<\/td>\n<td>12.1<\/td>\n<td>12.2<\/td>\n<td>11.4<\/td>\n<td>12.8<\/td>\n<td>9.23<\/td>\n<td>12.8<\/td>\n<td>14.2<\/td>\n<\/tr>\n<tr>\n<td>M6<\/td>\n<td>20.1<\/td>\n<td>10.1<\/td>\n<td>14.1<\/td>\n<td>10.7<\/td>\n<td>10.1<\/td>\n<td>12.1<\/td>\n<td>14.1<\/td>\n<td>17.1<\/td>\n<td>17.3<\/td>\n<td>16.1<\/td>\n<td>18.1<\/td>\n<td>13.1<\/td>\n<td>18.1<\/td>\n<td>20.1<\/td>\n<\/tr>\n<tr>\n<td>M7<\/td>\n<td>28.9<\/td>\n<td>14.5<\/td>\n<td>20.2<\/td>\n<td>15.3<\/td>\n<td>14.5<\/td>\n<td>17.3<\/td>\n<td>20.2<\/td>\n<td>24.6<\/td>\n<td>24.9<\/td>\n<td>23.1<\/td>\n<td>26<\/td>\n<td>18.8<\/td>\n<td>26<\/td>\n<td>28.9<\/td>\n<\/tr>\n<tr>\n<td>M8<\/td>\n<td>36.6<\/td>\n<td>18.3<\/td>\n<td>25.6<\/td>\n<td>19.4<\/td>\n<td>18.3<\/td>\n<td>22<\/td>\n<td>25.6<\/td>\n<td>31.1<\/td>\n<td>31.5<\/td>\n<td>29.3<\/td>\n<td>32.9<\/td>\n<td>23.8<\/td>\n<td>32.9<\/td>\n<td>36.6<\/td>\n<\/tr>\n<tr>\n<td>M10<\/td>\n<td>58<\/td>\n<td>29<\/td>\n<td>40.6<\/td>\n<td>30.7<\/td>\n<td>29<\/td>\n<td>34.8<\/td>\n<td>40.6<\/td>\n<td>49.3<\/td>\n<td>49.9<\/td>\n<td>46.4<\/td>\n<td>52.2<\/td>\n<td>37.7<\/td>\n<td>52.2<\/td>\n<td>58<\/td>\n<\/tr>\n<tr>\n<td>M12<\/td>\n<td>84.3<\/td>\n<td>42.2<\/td>\n<td>59<\/td>\n<td>44.7<\/td>\n<td>42.2<\/td>\n<td>50.6<\/td>\n<td>59<\/td>\n<td>71.7<\/td>\n<td>72.5<\/td>\n<td>67.4<\/td>\n<td>75.9<\/td>\n<td>54.8<\/td>\n<td>75.9<\/td>\n<td>84.3<\/td>\n<\/tr>\n<tr>\n<td>M14<\/td>\n<td>115<\/td>\n<td>57.5<\/td>\n<td>80.5<\/td>\n<td>61<\/td>\n<td>57.5<\/td>\n<td>69<\/td>\n<td>80.5<\/td>\n<td>97.8<\/td>\n<td>98.9<\/td>\n<td>92<\/td>\n<td>104<\/td>\n<td>74.8<\/td>\n<td>104<\/td>\n<td>115<\/td>\n<\/tr>\n<tr>\n<td>M16<\/td>\n<td>157<\/td>\n<td>78.5<\/td>\n<td>110<\/td>\n<td>83.2<\/td>\n<td>78.5<\/td>\n<td>94.2<\/td>\n<td>110<\/td>\n<td>133<\/td>\n<td>135<\/td>\n<td>126<\/td>\n<td>141<\/td>\n<td>102<\/td>\n<td>141<\/td>\n<td>157<\/td>\n<\/tr>\n<tr>\n<td>M18<\/td>\n<td>192<\/td>\n<td>96<\/td>\n<td>134<\/td>\n<td>102<\/td>\n<td>96<\/td>\n<td>115<\/td>\n<td>134<\/td>\n<td>163<\/td>\n<td>165<\/td>\n<td>154<\/td>\n<td>173<\/td>\n<td>125<\/td>\n<td>173<\/td>\n<td>192<\/td>\n<\/tr>\n<tr>\n<td>M20<\/td>\n<td>245<\/td>\n<td>123<\/td>\n<td>172<\/td>\n<td>130<\/td>\n<td>123<\/td>\n<td>147<\/td>\n<td>172<\/td>\n<td>208<\/td>\n<td>211<\/td>\n<td>196<\/td>\n<td>221<\/td>\n<td>159<\/td>\n<td>221<\/td>\n<td>245<\/td>\n<\/tr>\n<tr>\n<td>M22<\/td>\n<td>303<\/td>\n<td>152<\/td>\n<td>212<\/td>\n<td>161<\/td>\n<td>152<\/td>\n<td>182<\/td>\n<td>212<\/td>\n<td>258<\/td>\n<td>261<\/td>\n<td>242<\/td>\n<td>273<\/td>\n<td>197<\/td>\n<td>273<\/td>\n<td>303<\/td>\n<\/tr>\n<tr>\n<td>M24<\/td>\n<td>353<\/td>\n<td>177<\/td>\n<td>247<\/td>\n<td>187<\/td>\n<td>177<\/td>\n<td>212<\/td>\n<td>247<\/td>\n<td>300<\/td>\n<td>304<\/td>\n<td>282<\/td>\n<td>318<\/td>\n<td>229<\/td>\n<td>318<\/td>\n<td>353<\/td>\n<\/tr>\n<tr>\n<td>M27<\/td>\n<td>459<\/td>\n<td>230<\/td>\n<td>\/<\/td>\n<td>243<\/td>\n<td>230<\/td>\n<td>275<\/td>\n<td>321<\/td>\n<td>390<\/td>\n<td>395<\/td>\n<td>367<\/td>\n<td>413<\/td>\n<td>298<\/td>\n<td>413<\/td>\n<td>459<\/td>\n<\/tr>\n<tr>\n<td>M30<\/td>\n<td>561<\/td>\n<td>281<\/td>\n<td>\/<\/td>\n<td>297<\/td>\n<td>281<\/td>\n<td>337<\/td>\n<td>393<\/td>\n<td>477<\/td>\n<td>482<\/td>\n<td>449<\/td>\n<td>505<\/td>\n<td>365<\/td>\n<td>505<\/td>\n<td>561<\/td>\n<\/tr>\n<tr>\n<td>M33<\/td>\n<td>694<\/td>\n<td>347<\/td>\n<td>\/<\/td>\n<td>368<\/td>\n<td>347<\/td>\n<td>416<\/td>\n<td>486<\/td>\n<td>590<\/td>\n<td>597<\/td>\n<td>555<\/td>\n<td>625<\/td>\n<td>451<\/td>\n<td>625<\/td>\n<td>694<\/td>\n<\/tr>\n<tr>\n<td>M36<\/td>\n<td>817<\/td>\n<td>409<\/td>\n<td>\/<\/td>\n<td>433<\/td>\n<td>409<\/td>\n<td>490<\/td>\n<td>572<\/td>\n<td>694<\/td>\n<td>703<\/td>\n<td>654<\/td>\n<td>735<\/td>\n<td>531<\/td>\n<td>735<\/td>\n<td>817<\/td>\n<\/tr>\n<tr>\n<td>M39<\/td>\n<td>976<\/td>\n<td>488<\/td>\n<td>\/<\/td>\n<td>517<\/td>\n<td>488<\/td>\n<td>586<\/td>\n<td>683<\/td>\n<td>830<\/td>\n<td>839<\/td>\n<td>781<\/td>\n<td>878<\/td>\n<td>634<\/td>\n<td>878<\/td>\n<td>976<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<div class=\"section\">\n<h2>Capacit\u00e9 portante des assemblages boulonn\u00e9s<\/h2>\n<p>Pour une capacit\u00e9 maximale\u00a0: utiliser des boulons et \u00e9crous de capacit\u00e9 maximale adapt\u00e9s, avec les hauteurs appropri\u00e9es (type\u00a01 pour un pas grossier, type\u00a02 pour un pas fin), les tol\u00e9rances de filetage et les rapports de r\u00e9sistance. La rupture lors des essais de traction doit se produire dans les parties non filet\u00e9es, conform\u00e9ment aux normes GB\/T\u00a03098.1 ou 3098.6. Utiliser des goujons \u00e0 section r\u00e9duite, conform\u00e9ment aux normes GB\/T\u00a013807.2\/3, avec les tol\u00e9rances d\u00e9finies dans la norme GB\/T\u00a03103.4.<\/p>\n<ol>\n<li>Effectuer des essais de traction pour v\u00e9rifier les charges minimales.<\/li>\n<li>S'assurer que la hauteur de l'\u00e9crou respecte les exigences de type pour la r\u00e9partition de la charge.<\/li>\n<li>Choisir les mat\u00e9riaux de mani\u00e8re \u00e0 \u00e9viter les points faibles de l'assemblage.<\/li>\n<\/ol>\n<\/div>\n<div class=\"section\" style=\"background-color: #f9f9f9; padding: 20px; border-radius: 5px;\">\n<h2>FAQ<\/h2>\n<h3 style=\"font-size: 16px; margin-bottom: 5px;\">Quels mat\u00e9riaux conviennent aux applications \u00e0 -200 \u00b0C ?<\/h3>\n<p>Aciers aust\u00e9nitiques comme A4L, A4, A5 de nuance 70 ou 80, assurant la ductilit\u00e9 et la t\u00e9nacit\u00e9 selon le tableau 1.<\/p>\n<h3 style=\"font-size: 16px; margin-bottom: 5px;\">Comment choisir les boulons et \u00e9crous adapt\u00e9s aux hautes temp\u00e9ratures ?<\/h3>\n<p>Utilisez le tableau 3 pour des appariements rationnels, en veillant \u00e0 ce que la r\u00e9sistance de l'\u00e9crou &gt;70% du boulon et les tol\u00e9rances de filetage appropri\u00e9es pour une capacit\u00e9 compl\u00e8te.<\/p>\n<h3 style=\"font-size: 16px; margin-bottom: 5px;\">Que se passe-t-il si la temp\u00e9rature de fonctionnement d\u00e9passe +700\u00b0C ?<\/h3>\n<p>Les limites standard sont de +700 \u00b0C ; pour des temp\u00e9ratures sup\u00e9rieures, effectuer des essais sp\u00e9cifiques de fluage et de relaxation conform\u00e9ment aux directives DIN EN 10269.<\/p>\n<h3 style=\"font-size: 16px; margin-bottom: 5px;\">Pourquoi une limite d'\u00e9lasticit\u00e9 plus \u00e9lev\u00e9e pour les noix aust\u00e9nitiques\u00a0?<\/h3>\n<p>Pour tenir compte des variations de fabrication dans les petits lots, assurant la fiabilit\u00e9 lorsqu'ils sont associ\u00e9s \u00e0 des boulons plus tendres (voir tableau 3, note b).<\/p>\n<h3 style=\"font-size: 16px; margin-bottom: 5px;\">Comment tester la capacit\u00e9 de charge maximale ?<\/h3>\n<p>Effectuer des essais de traction selon GB\/T 3098.1 ou 3098.6, en v\u00e9rifiant l'emplacement de la rupture et les charges minimales des tableaux 4a\/5a.<\/p>\n<h3 style=\"font-size: 16px; margin-bottom: 5px;\">Existe-t-il des restrictions concernant la teneur en cuivre\u00a0?<\/h3>\n<p>Oui, \u22641% pour les aciers aust\u00e9nitiques afin d'\u00e9viter la fragilisation en service \u00e0 basse temp\u00e9rature.<\/p>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction to GB\/T 3098.8 Standard This standard outlines mechanical properties, materials, inspection, identification, and marking for bolted connection parts operating in extreme temperatures from -200\u00b0C to +700\u00b0C. It ensures reliability in applications such as pressure vessels, boilers, and high-temperature machinery, supplementing standards like GB\/T 3098.1, GB\/T 3098.6, and DIN EN 10269. Scope GB\/T 3098.8-2010 specifies [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5705","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts\/5705","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/comments?post=5705"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts\/5705\/revisions"}],"predecessor-version":[{"id":5707,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/posts\/5705\/revisions\/5707"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/media?parent=5705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/categories?post=5705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/fr\/wp-json\/wp\/v2\/tags?post=5705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}