Ar 400 Piatto
AR400 plate is a medium-hardness wear resistant steel designed for applications requiring a balance of abrasion resistance and toughness.
Its main advantages include:
- Nominal hardness around 400 HBW
- Quenched and tempered martensitic structure
- Good wear and impact resistance balance
- Reliable weldability and fabrication performance
- Descrizione
AR400 plate is a acciaio resistente all'usura (Abrasion Resistant steel) with a nominal hardness of around 400 HBW. It is engineered to provide an excellent balance between resistenza all'abrasione, tenacità, e saldabilità, making it one of the most commonly used wear plate grades in industrial applications.
AR400 is widely used in environments where materials are exposed to moderate to severe wear conditions such as impact, sliding abrasion, and material flow.
1. Chemical Composition of AR400 Plate
AR400 is typically a low-alloy quenched and tempered steel, designed to achieve hardness through controlled heat treatment rather than high carbon content.
| Elemento | Gamma tipica | Funzione |
|---|---|---|
| Carbonio (C) | 0.20 – 0.28% | Fornisce durezza e resistenza all'usura |
| Manganese (Mn) | 0.70 – 1.60% | Migliora la tenacità e la temprabilità |
| Silicio (E) | 0.20 – 0.70% | Strengthens steel matrix |
| Cromo (Cr) | 0.50 – 1.50% | Enhances wear and corrosion resistance |
| Nichel (In) | 0 – 1.00% | Improves toughness and impact resistance |
| Boro (B) | trace | Increases hardenability efficiency |
Key point:
AR400 achieves hardness mainly through quenching and tempering, not high carbon content, which helps maintain toughness.
2. Hardness and Mechanical Properties
AR400 plate is defined by its hardness level:
- Durezza: 360 – 440 HBW (approx. 400 HB nominal)
- Resistenza alla trazione: ~1000 – 1400 MPa (varies by manufacturer)
- Buona resistenza agli urti
- Moderate formability and weldability
Performance balance:
- Hard enough for abrasion resistance
- Tough enough to resist cracking under impact
3. Caratteristiche della microstruttura
AR400 steel typically has a quenched and tempered martensitic structure, che fornisce:
- Elevata durezza superficiale
- Uniform wear resistance through thickness
- Controlled toughness to prevent brittle failure
This microstructure ensures stable performance in dynamic working conditions.
4. Key Performance Features
1. Elevata resistenza all'usura
- Excellent resistance to sliding abrasion
- Suitable for continuous material flow environments
2. Good Impact Resistance
- Designed to withstand moderate impact loads
- Prevents cracking under shock conditions
3. Balanced Weldability
- Can be welded with proper procedures
- Requires preheating in thick sections
4. Lunga durata
- Extends equipment lifespan
- Riduce i costi di manutenzione e di fermo macchina
5. Common Applications of AR400 Plate
AR400 wear plate is widely used in:
- Mining equipment and dump truck bodies
- Excavator buckets and liners
- Scivoli e tramogge per impianti di cemento
- Sistemi di movimentazione del carbone
- Agricultural machinery wear parts
- Construction equipment liners
- Material handling and conveyor systems
