400 Acciaio HB
Among 400 HB steels, BW400 and NM400 offer clear advantages for heavy-duty wear environments:
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BW400: superior sliding wear resistance and dimensional stability
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NM400: excellent impact + sliding wear balance with good weldability
Mentre AR400 is suitable for general wear applications, BW400 and NM400 remain the preferred choice in elevata abrasione, minerario, e applicazioni industriali, garantendo lunga durata, reduced maintenance, and optimal performance.
- Descrizione
400 Acciaio HB is a widely used wear-resistant material in minerario, costruzione, e industrie di macchinari pesanti. Popular grades include NM400, BW400, e AR400, each designed to balance resistenza all'abrasione, tenacità, and industrial applicability.
1. Overview of NM400, BW400, e AR400
| Grado | Durezza (HB) | Caratteristiche chiave | Applicazioni |
|---|---|---|---|
| NM400 | 400 HB | High abrasion resistance with good toughness; ideal for impact + sliding wear | Fodere del frantoio, tramogge, cade, fodera per secchi |
| BW400 | 400 HB | Durezza uniforme, Eccellente resistenza all'usura, especially for heavy sliding wear; superior dimensional stability | Fodere per trasportatori, attrezzature minerarie, large abrasion surfaces |
| AR400 | 400 HB | Quenched and tempered steel with balanced hardness and impact resistance | General wear plates, earthmoving machinery, attrezzature da costruzione |
2. Advantages of NM400 and BW400
NM400
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Optimized alloy composition (C, Cr, Mn) for high abrasion and impact resistance.
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Performs well in combined impact and sliding wear environments.
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Buona saldabilità allows fabrication into customized components.
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Commonly used in mining crushers, rivestimenti di macinazione, and hoppers.
BW400
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Uniform hardness throughout the plate thickness assicura durata di servizio più lunga.
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Excellent sliding wear resistance, suitable for heavy-duty conveyor liners and chutes.
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Superior dimensional stability, reducing deformation during fabrication or installation.
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Performs well under continuous abrasive conditions where NM400 may experience slight surface wear over time.
3. Comparison Summary
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AR400 is versatile but slightly less specialized in high-abrasion scenarios.
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NM400 excels in combined impact and sliding wear, making it ideal for crushers and hoppers.
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BW400 fornisce maximum sliding wear resistance and dimensional stability, making it superior for large-scale conveyor systems and heavy mining equipment.
4. Applicazioni di 400 HB Steel Grades
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Estrazione: fodera per secchi, crusher jaws, rivestimenti di macinazione, tramogge
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Costruzione: lame del bulldozer, earthmoving machinery
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Movimentazione dei materiali: fodere per trasportatori, cade, pompe per liquami
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Industrial machinery: impact-resistant and high-abrasion surfaces
