Plaque d'acier Ar
AR plate steel includes a range of wear-resistant grades such as AR400, AR450, AR500, and extended high-hardness grades like AR550 and AR600. These materials are defined by increasing hardness levels, offering progressively higher wear resistance for more demanding working conditions.
- Description
Plaque d'acier AR (Plaque d'acier résistante à l'abrasion) is a group of quenched and tempered wear-resistant steels designed to withstand sliding abrasion, impact, and heavy material wear. Il est largement utilisé dans l'exploitation minière, construction, agriculture, ciment, et industries de manutention de matériaux en vrac.
AR grades are mainly defined by Dureté de Brinell (HBW), which directly reflects wear resistance performance. The most common AR plate steel grades include AR400, AR450, et AR500.
AR Series Wear Resistant Steel Grades
| Grade | Dureté (HBW) | Niveau de résistance à l'usure | Dureté | Principales caractéristiques | Applications typiques |
|---|---|---|---|---|---|
| AR400 | ~360-440 | Moyen | Bien | Résistance à l’usure et ténacité équilibrées, easy to process | Engins de chantier, équipement minier, pièces d'usure structurelles |
| AR450 | ~430–480 | Haut | Moyen | Improved abrasion resistance with higher hardness | Heavy-duty equipment, doublures, carrosseries de camions à benne basculante |
| AR500 | ~470-540 | Très élevé | Medium-low | High hardness for severe abrasion environments | Mining systems, concasseurs, doublures à haute tenue |
Extended AR Grades (Special Applications)
Some manufacturers also produce higher or specialized AR grades:
| Grade | Dureté (HBW) | Principales caractéristiques | Applications typiques |
|---|---|---|---|
| AR550 | ~520–600 | Résistance à l'usure extrêmement élevée | Severe mining and crushing environments |
| AR600 | ~570–650 | Maximum hardness level | Extreme abrasion and impact systems |
Performance Characteristics of AR Plate Steel
AR steel is produced through traitement thermique de trempe et revenu, resulting in a hardened martensitic structure. This provides:
- High surface hardness for abrasion resistance
- Good impact resistance depending on grade
- Stable performance under sliding wear conditions
- Controlled weldability with proper procedures
À mesure que la dureté augmente, la résistance à l'usure s'améliore, while toughness and formability slightly decrease.
Grade Selection Principle
- AR400 → General industrial wear applications with balanced performance
- AR450 → Medium to heavy wear conditions with improved durability
- AR500 → Environnements à forte abrasion tels que l'exploitation minière et la manutention en vrac
- AR550–AR600 → Applications extrêmes contre l'usure et les chocs
