Piastra in acciaio 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.
- Descrizione
AR plate steel (Abrasion Resistant steel plate) is a group of quenched and tempered wear-resistant steels designed to withstand sliding abrasion, impatto, and heavy material wear. È ampiamente utilizzato nel settore minerario, costruzione, agriculture, cemento, e industrie di movimentazione di materiali sfusi.
AR grades are mainly defined by Brinell hardness (HBW), which directly reflects wear resistance performance. The most common AR plate steel grades include AR400, AR450, and AR500.
AR Series Wear Resistant Steel Grades
| Grado | Durezza (HBW) | Livello di resistenza all'usura | Robustezza | Caratteristiche principali | Applicazioni tipiche |
|---|---|---|---|---|---|
| AR400 | ~360–440 | Medio | Bene | Balanced wear resistance and toughness, easy to process | Macchine edili, attrezzature minerarie, parti strutturali soggette ad usura |
| AR450 | ~430–480 | Alto | Medio | Improved abrasion resistance with higher hardness | Heavy-duty equipment, fodere, corpi di autocarri con cassone ribaltabile |
| AR500 | ~ 470–540 | Molto alto | Medio-basso | High hardness for severe abrasion environments | Mining systems, frantoi, high-wear liners |
Extended AR Grades (Special Applications)
Some manufacturers also produce higher or specialized AR grades:
| Grado | Durezza (HBW) | Caratteristiche principali | Applicazioni tipiche |
|---|---|---|---|
| AR550 | ~520–600 | Resistenza all'usura estremamente elevata | 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 quenching and tempering heat treatment, 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
As hardness increases, la resistenza all'usura migliora, 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 → High abrasion environments such as mining and bulk handling
- AR550–AR600 → Extreme wear and impact applications
