Qualité sans compromis

AISI 4140

ASTM A29 / ASTM A322 / ASTM A434

Trempé revenu (+QT) 

PROPRIÉTÉS ET UTILISATIONS

L'AISI 4140, également connu sous le nom de SAE 4140 ou 42CrMo4 dans la norme européenne EN 10083, est un acier polyvalent, à teneur moyenne en carbone et faiblement allié, réputé pour son excellente résistance, sa ténacité et sa résistance à l'usure. Largement utilisé dans diverses industries, ce type d’acier est un matériau de choix pour les applications nécessitant un équilibre entre durabilité et maniabilité. Haute résistance et ténacité : l'AISI 4140 offre une excellente résistance à la traction et une bonne résistance aux chocs, ce qui le rend idéal pour les composants soumis à de lourdes charges. Résistance à l'usure : ses éléments d'alliage améliorent la résistance à l'abrasion, prolongeant ainsi la durée de vie des composants dans les environnements à forte usure.

acier AISI 4140

Applications courantes de l'AISI 4140:

Composants automobiles et aérospatiaux : l'AISI 4140 est largement utilisé dans les industries automobile et aérospatiale pour des pièces telles que les vilebrequins, les essieux, les bielles et les composants de train d'atterrissage. Son rapport résistance/poids élevé et sa résistance à la fatigue le rendent idéal pour ces applications à fortes contraintes.

Industrie pétrolière et gazière : Dans l'industrie pétrolière et gazière, l'AISI 4140 est utilisé pour les colliers de forage, les joints d'outils et d'autres composants de forage souterrain. Sa capacité à supporter des charges élevées et à résister à l'usure dans des environnements difficiles garantit fiabilité et longévité.

Machines et équipements lourds : L’acier est un choix courant pour la fabrication de composants de machines lourdes, notamment d’engrenages, de pignons et d’arbres. Sa robustesse et sa résistance à l'usure le rendent adapté aux équipements utilisés dans la construction, l'exploitation minière et l'agriculture.

Fixations et boulons : L'AISI 4140 est souvent utilisé pour produire des boulons, des goujons et des fixations à haute résistance pour des applications nécessitant une résistance à la traction exceptionnelle, comme dans les ponts, les récipients sous pression et les machines industrielles.

Outils et matrices : Bien qu'il ne s'agisse pas d'un acier à outils traditionnel, l'AISI 4140 est parfois utilisé pour forger des matrices, des porte-matrices et d'autres composants d'outils où une dureté modérée et une ténacité élevée sont requises. Sa capacité à être traité thermiquement pour obtenir une dureté spécifique en fait une alternative rentable aux aciers à outils plus coûteux.

Ingénierie générale : L'AISI 4140 est souvent utilisé dans l'ingénierie générale pour les composants structurels tels que les broches, les accouplements et les pièces de systèmes hydrauliques, où ses propriétés équilibrées garantissent des performances fiables sous contrainte mécanique.

L'AISI 4140 est souvent comparé à d'autres aciers alliés à teneur moyenne en carbone, tels que l'AISI 4340 et l'AISI 4130. Comparé à l'AISI 4340, qui contient du nickel pour une ténacité accrue, l'AISI 4140 est moins cher et plus facile à usiner, mais peut ne pas offrir le même niveau de résistance aux chocs dans des conditions extrêmes. L'AISI 4130, avec une teneur en carbone plus faible (0,28-0,33 %), est plus soudable, mais présente une résistance et une trempabilité inférieures à celles du 4140, ce qui le rend plus adapté aux applications plus légères.

 

CORRESPONDANCE DÉSIGNATION INTERNATIONALE

QUALITYEUROPEGERMANYFRANCESPAING.B.USA
ENDINW.n.AFNORUNEB.S.AISI/SAE
AISI 4140     1.7225  42CD4TS   708M40 4140

 

COMPOSITION CHIMIQUE %

DÉSIGNATION DE L'ACIERCOMPOSITION CHIMIQUE %
QUALITE'NUMERICCMnSiP
max		S
max		CrMoNiV
AISI 4140 1.7225 0,38 ÷ 0,43 0,75 ÷ 1,00 0,15 ÷ 0,35 0,035 0,040 0,80 ÷ 1,10 0,15 ÷ 0,25 - -

 

CARACTÉRISTIQUES MÉCANIQUES

ACIER  
désignation W.nr. Re min Rm min A min Z min Durezza HB KV a -46°C min
N/mm2 % % max J
AISI 4140 1.7225 520 677 20 45 237 27

 

NORMALEMENT DISPONIBLE EN STOCK 

Coloration M.T.AciersTraitement thermiqueÉtat de surfaceDiamètre Ø (mm)
Aisi 4140 Trempé revenu (+QT)

Ronds laminés

 32-280

 

 

 

 

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  • SELECT `c2`.`language`,CONCAT_WS(':', `c2`.`id`, `c2`.`alias`) AS `id`,CONCAT_WS(':', `ca`.`id`, `ca`.`alias`) AS `catid` FROM `mtcca_content` AS `c` INNER JOIN `mtcca_associations` AS `a` ON `a`.`id` = `c`.`id` AND `a`.`context` = :context INNER JOIN `mtcca_associations` AS `a2` ON `a`.`key` = `a2`.`key` INNER JOIN `mtcca_content` AS `c2` ON `a2`.`id` = `c2`.`id` INNER JOIN `mtcca_categories` AS `ca` ON `c2`.`catid` = `ca`.`id` AND `ca`.`extension` = :extension2 WHERE `c`.`id` = :id AND c2.access IN (1,5) AND c2.language != 'fr-FR' AND (c2.publish_up IS NULL OR c2.publish_up <= '2025-07-20 02:52:25') AND (c2.publish_down IS NULL OR c2.publish_down >= '2025-07-20 02:52:25') AND c2.state = 11.03ms3.97KBParams/libraries/src/Language/Associations.php:145Copy
  • SELECT `m`.`id`,`m`.`title`,`m`.`module`,`m`.`position`,`m`.`content`,`m`.`showtitle`,`m`.`params`,`mm`.`menuid` FROM `mtcca_modules` AS `m` LEFT JOIN `mtcca_modules_menu` AS `mm` ON `mm`.`moduleid` = `m`.`id` LEFT JOIN `mtcca_extensions` AS `e` ON `e`.`element` = `m`.`module` AND `e`.`client_id` = `m`.`client_id` WHERE ( ( (`m`.`published` = 1 AND `e`.`enabled` = 1 AND `m`.`client_id` = :clientId AND `m`.`access` IN (:preparedArray1,:preparedArray2)) AND (`m`.`publish_up` IS NULL OR `m`.`publish_up` <= :publishUp)) AND (`m`.`publish_down` IS NULL OR `m`.`publish_down` >= :publishDown)) AND (`mm`.`menuid` = :itemId OR `mm`.`menuid` <= 0) AND `m`.`language` IN (:preparedArray3,:preparedArray4) ORDER BY `m`.`position`,`m`.`ordering`2.79ms18.22KBParams/libraries/src/Cache/Controller/CallbackController.php:120Copy
  • SELECT `a`.`menutype`,`a`.`title` FROM `mtcca_menu_types` AS `a` WHERE `a`.`client_id` = 0471μs656B/libraries/gantry5/src/classes/Gantry/Framework/Menu.php:138Copy
  • SELECT m.id, m.alias, m.path AS route, m.level, m.parent_id FROM mtcca_menu AS m WHERE m.menutype = 'mainmenu-fra' AND m.parent_id > 0 AND m.client_id = 0 AND m.published >= 0 ORDER BY m.lft1.28ms1.98KB/libraries/gantry5/src/classes/Gantry/Framework/Menu.php:791Copy
  • SELECT `alias`,`catid` FROM mtcca_content WHERE `id` = :key483μs1.37KBParams/libraries/src/Component/Router/Rules/PreprocessRules.php:123Copy
  • SELECT `alias`,`catid` FROM mtcca_content WHERE `id` = :key429μs1.37KBParams/libraries/src/Component/Router/Rules/PreprocessRules.php:123Copy
  • SELECT * FROM `mtcca_extensions` WHERE `element` = 'com_gsd' AND `type` = 'component'819μs2.53KB/plugins/system/nrframework/NRFramework/Extension.php:160Copy
  • SHOW FULL COLUMNS FROM `mtcca_gsd_config`1.55ms1.3KB/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:539Copy
  • SELECT * FROM `mtcca_gsd_config` WHERE `name` = 'config'947μs592B/libraries/src/Table/Table.php:780Copy
  • SELECT `a`.`id`,`a`.`asset_id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`state`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`version`,`a`.`ordering`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`metadata`,`a`.`featured`,`a`.`language`,`fp`.`featured_up`,`fp`.`featured_down`,`c`.`title` AS `category_title`,`c`.`alias` AS `category_alias`,`c`.`access` AS `category_access`,`c`.`language` AS `category_language`,`fp`.`ordering`,`u`.`name` AS `author`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language`,ROUND(`v`.`rating_sum` / `v`.`rating_count`, 1) AS `rating`,`v`.`rating_count` AS `rating_count` FROM `mtcca_content` AS `a` INNER JOIN `mtcca_categories` AS `c` ON `c`.`id` = `a`.`catid` LEFT JOIN `mtcca_content_frontpage` AS `fp` ON `fp`.`content_id` = `a`.`id` LEFT JOIN `mtcca_users` AS `u` ON `u`.`id` = `a`.`created_by` LEFT JOIN `mtcca_categories` AS `parent` ON `parent`.`id` = `c`.`parent_id` LEFT JOIN `mtcca_content_rating` AS `v` ON `a`.`id` = `v`.`content_id` WHERE ( (`a`.`id` = :pk AND `c`.`published` > 0) AND (`a`.`publish_up` IS NULL OR `a`.`publish_up` <= :publishUp)) AND (`a`.`publish_down` IS NULL OR `a`.`publish_down` >= :publishDown)1.52ms22.13KBParams/components/com_content/src/Model/ArticleModel.php:215Copy
  • SELECT a.* FROM mtcca_gsd a WHERE a.state = 1 AND a.plugin = 'content' AND a.appview IN ('article','*') AND a.language IN ('fr-FR','*') ORDER BY a.id desc686μs1.45KB/libraries/src/MVC/Model/BaseDatabaseModel.php:164Copy
  • SELECT * FROM `mtcca_schemaorg` WHERE `itemId` = :itemId AND `context` = :context558μs1.55KBParams/plugins/system/schemaorg/src/Extension/Schemaorg.php:406Copy
  • SELECT `a`.`id`,`a`.`asset_id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`state`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`version`,`a`.`ordering`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`metadata`,`a`.`featured`,`a`.`language`,`fp`.`featured_up`,`fp`.`featured_down`,`c`.`title` AS `category_title`,`c`.`alias` AS `category_alias`,`c`.`access` AS `category_access`,`c`.`language` AS `category_language`,`fp`.`ordering`,`u`.`name` AS `author`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language`,ROUND(`v`.`rating_sum` / `v`.`rating_count`, 1) AS `rating`,`v`.`rating_count` AS `rating_count` FROM `mtcca_content` AS `a` INNER JOIN `mtcca_categories` AS `c` ON `c`.`id` = `a`.`catid` LEFT JOIN `mtcca_content_frontpage` AS `fp` ON `fp`.`content_id` = `a`.`id` LEFT JOIN `mtcca_users` AS `u` ON `u`.`id` = `a`.`created_by` LEFT JOIN `mtcca_categories` AS `parent` ON `parent`.`id` = `c`.`parent_id` LEFT JOIN `mtcca_content_rating` AS `v` ON `a`.`id` = `v`.`content_id` WHERE ( (`a`.`id` = :pk AND `c`.`published` > 0 AND `a`.`language` IN (:preparedArray1,:preparedArray2)) AND (`a`.`publish_up` IS NULL OR `a`.`publish_up` <= :publishUp)) AND (`a`.`publish_down` IS NULL OR `a`.`publish_down` >= :publishDown) AND `a`.`state` IN (:preparedArray3,:preparedArray4)1.45ms22.23KBParams/components/com_content/src/Model/ArticleModel.php:215Copy
  • SELECT `a`.`id`,`a`.`asset_id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`state`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`version`,`a`.`ordering`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`metadata`,`a`.`featured`,`a`.`language`,`fp`.`featured_up`,`fp`.`featured_down`,`c`.`title` AS `category_title`,`c`.`alias` AS `category_alias`,`c`.`access` AS `category_access`,`c`.`language` AS `category_language`,`fp`.`ordering`,`u`.`name` AS `author`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language`,ROUND(`v`.`rating_sum` / `v`.`rating_count`, 1) AS `rating`,`v`.`rating_count` AS `rating_count` FROM `mtcca_content` AS `a` INNER JOIN `mtcca_categories` AS `c` ON `c`.`id` = `a`.`catid` LEFT JOIN `mtcca_content_frontpage` AS `fp` ON `fp`.`content_id` = `a`.`id` LEFT JOIN `mtcca_users` AS `u` ON `u`.`id` = `a`.`created_by` LEFT JOIN `mtcca_categories` AS `parent` ON `parent`.`id` = `c`.`parent_id` LEFT JOIN `mtcca_content_rating` AS `v` ON `a`.`id` = `v`.`content_id` WHERE ( (`a`.`id` = :pk AND `c`.`published` > 0 AND `a`.`language` IN (:preparedArray1,:preparedArray2)) AND (`a`.`publish_up` IS NULL OR `a`.`publish_up` <= :publishUp)) AND (`a`.`publish_down` IS NULL OR `a`.`publish_down` >= :publishDown) AND `a`.`state` IN (:preparedArray3,:preparedArray4)1.34ms22.23KBParams/components/com_content/src/Model/ArticleModel.php:215Copy
  • SELECT SUM(CASE WHEN `a`.`next_execution` <= :now THEN 1 ELSE 0 END) AS due_count,SUM(CASE WHEN `a`.`locked` IS NULL THEN 0 ELSE 1 END) AS locked_count FROM `mtcca_scheduler_tasks` AS `a` WHERE `a`.`state` = 1522μs1.37KBParams/administrator/components/com_scheduler/src/Model/TasksModel.php:517Copy
  • SELECT `session_id` FROM `mtcca_session` WHERE `session_id` = ?409μs1008BParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:277Copy
  • INSERT INTO `mtcca_session` (`data`,`time`,`session_id`) VALUES (?, ?, ?)529μs544BParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:301Copy