Wear SteelWear Steel
1.3401 X120mn12
1.3401 X120mn12
Materiale X120mn12

Indossa l'acciaio

Acciaio al manganese ad alto tenore di carbonio Acciaio al manganese ad alto tenore di carbonio
Acciaio resistente all'usura Acciaio resistente all'usura

Wear steel is a critical material solution for industries exposed to abrasive and impact conditions. Grades such as AR400, AR450, AR500, and NM series steels provide structured hardness classifications for different working environments.

Proper grade selection based on hardness, tenacità, and application conditions significantly extends equipment service life, riduce i tempi di inattività, and improves operational efficiency.

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Wear steel, noto anche come resistente all'abrasione (AR) acciaio, is a category of high-strength alloy steel specifically engineered to resist mechanical wear, attrito, and surface material loss. È ampiamente utilizzato nel settore minerario, cava, cemento, costruzione, recycling, and heavy equipment manufacturing industries.

The core performance indicator of wear steel is Durezza Brinell (HBW). Higher hardness generally improves abrasion resistance, while toughness ensures the material can withstand impact without cracking.

Classification of Wear Steel by Hardness

Wear steel grades are typically classified according to nominal hardness values. Common international naming systems include AR (Resistente all'abrasione) e NM (Wear Resistant under Chinese GB standard).

Below is a technical comparison of commonly used wear steel grades:

Grado Durezza tipica (HBW) Forza di snervamento (MPa, ca.) Caratteristiche chiave Applicazioni tipiche
AR360 / NM360 320–380 ≥ 900 Good wear resistance with high toughness Fodere per trasportatori, moderate wear components
AR400 / NM400 370–430 ≥ 1000 Balanced hardness and weldability Secchi, tramogge, dump bodies
AR450 / NM450 420–480 ≥ 1100 Improved abrasion resistance Benne caricatrici, indossare fodere
AR500 / NM500 470–540 ≥ 1250 High hardness for severe wear Crusher, attrezzature minerarie
AR550 / NM550 530–580 ≥ 1400 Very high wear resistance High-abrasion industrial liners
AR600 / NM600 570–620+ ≥ 1600 Extreme abrasion environments Heavy mining and impact zones

Nota: Mechanical properties vary by thickness and production process.

Chemical Composition Characteristics

Wear steel achieves high hardness through controlled alloying and heat treatment. Typical alloying elements include:

  • Carbonio (C): Aumenta la durezza e la resistenza

  • Manganese (Mn): Migliora la temprabilità e la tenacità

  • Cromo (Cr): Enhances wear and corrosion resistance

  • Nichel (In): Migliora la tenacità

  • Molibdeno (Mo): Increases strength and hardenability

  • Boro (B, small amounts): Migliora significativamente la temprabilità

The combination of alloy design and quenching/tempering processes results in a martensitic microstructure, which provides excellent abrasion resistance.

High Manganese Wear Steel (Work-Hardening Type)

Unlike quenched and tempered AR steel, acciaio ad alto contenuto di manganese (commonly Mn13 or Hadfield steel) operates under a different wear mechanism.

  • Initial hardness: approximately 200–250 HBW

  • Under impact loading, the surface rapidly work-hardens to much higher hardness levels

  • Excellent performance under combined impact and abrasion

Le applicazioni tipiche includono:

  • Rock crushers

  • Railway crossings

  • Heavy impact liners

This grade is suitable where impact loading is dominant rather than pure sliding abrasion.

Thickness Range and Processing

Wear steel plates are commonly supplied in thicknesses from:

  • 3 mm a 100 mm (standard range)

  • Custom thickness available for heavy engineering

Processing capabilities typically include:

  • Taglio al plasma

  • Taglio laser

  • Piegatura e formatura (within hardness limits)

  • Welding with controlled preheat procedures

Higher hardness grades require more attention during welding and forming due to reduced ductility.

Selection Guidelines for Wear Steel Grades

When selecting wear steel, the following factors must be evaluated:

  1. Tipo di usura (scorrevole, impatto, scriccatura, or combined)

  2. Required service life

  3. Impact load intensity

  4. Requisiti di fabbricazione (taglio, flessione, saldatura)

  5. Operating temperature

General recommendations:

  • Moderate abrasion with structural requirements → AR360 / AR400

  • Severe sliding abrasion → AR450 / AR500

  • Extreme abrasion with minimal forming → AR550 / AR600

  • High impact conditions → High manganese steel

Materiale X120mn12

1.3401 X120mn12

Mn13