Wear Plate 400
Wear Plate 400 (AR400 / NM400) provides an ideal balance of hardness, toughness, and fabrication performance.
It is internationally recognized with equivalents such as Hardox 400 (EU), XAR 400 (Germany), and AR400 (USA), making it a reliable choice for mining, construction, cement, and material handling industries.
- Description
Wear Plate 400 refers to abrasion resistant steel with a Brinell hardness of approximately 400 HBW.
It is widely used in mining, construction, cement, and material handling industries, offering excellent wear resistance while maintaining good toughness and fabrication performance.
The exact chemical composition and grade designation vary between countries, but all share similar hardness and mechanical properties.
Common International Grades Equivalent to AR400 / NM400
| Region / Standard | Grade Equivalent | Hardness (HBW) | Yield Strength (MPa) | Tensile Strength (MPa) | Impact Toughness (J, -40°C) |
|---|---|---|---|---|---|
| USA / ASTM | AR400 | 360–440 | 1000–1250 | 1200–1400 | ≥27 |
| Europe / EN | Hardox 400 | 360–440 | 1000–1250 | 1200–1400 | ≥27 |
| Germany / DIN | XAR 400 | 360–440 | 1000–1250 | 1200–1400 | ≥27 |
| China / GB | NM400 | 360–440 | 1000–1250 | 1200–1400 | ≥27 |
| Japan / JIS | NM400 | 360–440 | 1000–1250 | 1200–1400 | ≥27 |
| Australia / AS | AR400 | 360–440 | 1000–1250 | 1200–1400 | ≥27 |
Note: Hardness, strength, and impact values are approximate averages; exact values depend on plate thickness and manufacturer heat treatment.
Mechanical Properties
Hardness: 360–440 HBW ensures high wear resistance for sliding and light impact abrasion.
Yield Strength: 1000–1250 MPa allows the plate to withstand heavy loads without permanent deformation.
Tensile Strength: 1200–1400 MPa ensures the plate can resist stretching under stress.
Impact Toughness: ≥27 J at -40°C provides sufficient resistance to cracking during moderate impact.
Typical Applications
| Application Area | Examples | Reason for Use |
|---|---|---|
| Mining | Truck liners, hoppers, feeder plates | Resistant to sliding abrasion from ore and rock |
| Construction | Excavator buckets, bulldozer blades | Balances wear resistance and formability |
| Cement & Concrete | Mixers, chutes, conveyors | Protects against sand and gravel wear |
| Material Handling | Conveyor plates, chutes | Extends service life under abrasive materials |
| Light Impact Areas | Storage bins, liners | Sufficient toughness for moderate impact |
Key Selection Notes
AR400 / NM400 is a versatile grade suitable for medium abrasion + moderate impact conditions.
For higher wear resistance, choose AR450 or AR500, but fabrication becomes more challenging.
For impact-heavy applications, consider Mn13 (high manganese steel), which work-hardens under repeated impact.
