Wear Resistant Steel Plate
Wear resistant steel plates are special steel plate products designed for use in conditions of large-area wear. They are typically made by laminating a high-hardness alloy layer onto the surface of ordinary steel plates.
Structural principle of wear-resistant steel plates: A base plate of low-carbon steel or low-alloy steel with good toughness is bonded to a high-hardness alloy wear-resistant layer through a special process (such as quenching and tempering, or composite welding).
Description
Wear resistant steel plates are special steel plate products designed for use in conditions of large-area wear. They are typically made by laminating a high-hardness alloy layer onto the surface of ordinary steel plates.
Structural principle of wear resistant steel plates: A base plate of low-carbon steel plate or low-alloy steel plates with good toughness is bonded to a high-hardness alloy wear-resistant layer through a special process (such as quenching and tempering, or composite welding).
Key features of wear resistant steel plates: High wear resistance and impact resistance; supports cutting, bending, and welding; some can withstand temperatures above 600℃.
Applications of wear-resistant steel plates: Widely used in the manufacture of components for high-wear industrial equipment in mining, cement, power, metallurgy, and ports.
Classification and Characteristics of Wear Resistant Steel Plates:
Wear Resistant Steel Plate materials mainly include NM series wear-resistant steel plates (such as NM400, NM450 Wear Resistant Steel Plate, NM500, NM550, NM600, etc.), bimetallic composite wear-resistant plates, high-chromium wear-resistant plates, and imported series wear-resistant plates.
1. NM Series Wear Resistant Steel Plates: Named after Brinell hardness values, produced through a quenching and tempering process, possessing both high hardness and impact resistance:
NM400 Wear Resistant Steel Plate: Brinell hardness 360-420HB, yield strength ≥900MPa, wear resistance 20-25 times that of low-carbon steel, suitable for ball mill liners, crusher liners, etc.
NM500 Wear Resistant Steel Plate: Brinell hardness approximately 500HB, surface hardness HRC50 or higher, used in heavy-duty applications such as excavator bucket plates, pulverized coal conveying pipelines, etc.
2. Bimetallic Composite Wear-Resistant Steel Plate
Made of a low-carbon steel substrate and a high-hardness alloy wear-resistant layer (such as chromium carbide), with the wear-resistant layer having a hardness of HRC58-65, a temperature resistance ≤800℃, and wear resistance 15-20 times that of ordinary steel plates.
The substrate can be ordinary steel plate, heat-resistant steel plate, or stainless steel plate, and supports cutting and welding.
Typical applications: Linings for metallurgical equipment, high-temperature wear-resistant pipes.
3. Other High-Hardness Wear-Resistant Materials
High-Chromium Wear-Resistant Steel Plate: Contains 25-30% chromium, carbide volume fraction exceeding 50%, hardness HV1400-1800, strong corrosion resistance, suitable for the power and coal industries.
4. Imported Wear Resistant Steel Plates: Such as Durostat 450, DILLIDUR 450, and JFE-EH 450, with thicknesses ranging from 3-100mm. Known for their high toughness and wear resistance, they are used in engineering machinery bucket plates, etc.
5. Ultra-thin Wear Resistant Steel Plates: Available in single-metal and bimetallic types. The corrosion-resistant type offers 2-3 times the corrosion resistance of ordinary steel, suitable for space-constrained applications.
Specifications of Wear Resistant Steel Plate:
| Standard | GB | ASTM | SSAB OXELOSUND | JIS |
| GRADE | NM360, NM400, NM450, NM500, NM550, NM600 | XAR400, XAR450, XAR500, XAR550 | HAR400, HAR450, HAR500, HAR550, HAR600 | NK-EH360, JFE-EH400, JFE-EH450, JFE-EH500 |
| Thickness | 6.0-200mm，etc | |||
| Width | 1500-4100mm，etc | |||
| Length | 2000-12000mm，etc | |||
| Standard | ASTM，AISI，JIS，GB， DIN，EN | |||
| Certification | ISO, SGS，BV | |||
| Grade | |||||
| Chemical Composition ( ≤ ) | NM300 | NM360 | NM400 | NM450 | NM500 |
| C | 0.23 | 0.25 | 0.3 | 0.35 | 0.38 |
| Si | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Mn | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 |
| P | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 |
| S | 0.015 | 0.015 | 0.01 | 0.01 | 0.01 |
| Cr | 0.7 | 0.8 | 1 | 1.1 | 1.2 |
| Ni | 0.5 | 0.5 | 0.7 | 0.8 | 1 |
| Mo | 0.4 | 0.5 | 0.5 | 0.55 | 0.65 |
| Thickness (mm) | ≤80 | ≤80 | ≤80 | ≤80 | ≤70 |
| Tensile strength (MPa) | ≥1000 | ≥1100 | ≥1200 | ≥1250 | — |
| Elongation A (%) | ≥14 | ≥12 | ≥10 | ≥7 | — |
| Surface Brinell hardness (HBW) | 270-330 | 330-390 | 370-430 | 420-480 | ≥470 |
| Grade Comparison | |||||
| GB | NM300,NM360,NM400,NM450,NM500 | ||||
| SS | HARDNESS400, HARDNESS450, HARDNESS500, HARDNESS600 | ||||
| DIN | XAR400, XAR450, XAR500, XAR600, Dillidur400, Dillidur500 | ||||
| NBN | QUARD400, QUARD450, QUARD500 | ||||
| NF | FORA400, FORA500, Creusabro4800, Creusabro8000 | ||||
| JIS | JFE-EH360 , JFE – EH400 , JFE – EH500 , WEL-HARD400 , WELHARD500 | ||||
| SFS | RAEX400, RAEX450, RAEX500 | ||||
| Mechanical Properties | ||||||
| Material | Thickness(mm) | Strength of extension | Elongation | Impact energy(vertical) | BH(Brinell Hardness) | |
| ℃ | Akv/J | |||||
| NM300 | 6-80 | ≥1000 | ≥14 | -20 | ≥24 | 270-300 |
| NM360 | 6-80 | ≥1100 | ≥12 | -20 | ≥24 | 330-390 |
| NM400 | 6-80 | ≥1200 | ≥10 | -20 | ≥24 | 370-430 |
| NM450 | 6-80 | ≥1250 | ≥7 | -20 | ≥24 | 420-480 |
| NM500 | 6-70 | / | / | / | / | ≥470 |
| NM550 | 6-70 | / | / | / | / | ≥530 |
| HarDox450 | 5-50 | ≥1400 | 10 | -40 | ≥35 | 425~475 |
| HarDox500 | 5-50 | / | / | -40 | ≥30 | 450~540 |
| HarDox550 | 5-50 | / | / | -40 | ≥24 | 450~540 |
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