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Abrasion-resistant steel, also known as wear-resistant steel, is a high-strength material specifically engineered to withstand heavy surface wear and tear in demanding environments. Formulated with high carbon and alloying elements, this steel offers superior durability, making it ideal for industries such as mining, construction, and heavy machinery where longevity and performance are crucial. Its exceptional hardness and resistance to impact reduce maintenance costs and extend the life of equipment, ensuring reliable operation even in the harshest conditions. Our featured products include AR400, AR450, AR500, AR550, and AR600, commonly referred to in China as NM400, NM450, NM500, NM550, and NM600.
Abrasion-resistant steel encompasses a wide range of types, generally categorized into high-manganese steel, medium and low-alloy wear-resistant steel, chromium-molybdenum silicon manganese steel, cavitation-resistant steel, erosion-resistant steel, and other specialized wear-resistant steels. Additionally, common alloy steels such as stainless steel, bearing steel, alloy tool steel, and alloy structural steel are often used as wear-resistant materials under specific conditions due to their readily available sources and excellent properties, making them a significant part of the abrasion-resistant steel market.
| Steel Grade | Available Specification(mm) |
| AR400 | 3.0-25.0 ร 1000-2050 |
| AR450 | 3.0-25.0 ร 1000-2050 |
| AR500 | 3.0-25.0 ร 1000-2050 |
| AR550 | 4.0-25.0 ร 1000-2050 |
| AR600 | 4.0-25.0 ร 1000-2050 |
| Abrasion Resistant Steel Plate Sheet and Strip | ||||||
| NO. | GB | AISI | DIN | JIS | JFE | SSAB |
| 1 | NM300 | Dillidur 325L | ||||
| 2 | NM360 | A514 | Dillidur 360 | JFE-EH360 | ||
| 3 | NM400 | A514 | Dillidur 400V | JFE-EH400 | EH400 | HARDOX400 |
| 4 | NM450 | A514 | Dillidur 450V | JFE-EH450 | EH450 | HARDOX450 |
| 5 | NM500 | A514 | Dillidur 500V | JFE-EH500 | EH500 | HARDOX500 |
| 6 | NM550 | Dillidur 325L | HARDOX550 | |||
| 7 | NM600 | A514 | Dillidur 360 | JFE-EH600 | HARDOX600 | |
Abrasion-resistant steel is essential in various industries, including mining machinery, coal transportation, construction machinery, agricultural equipment, building materials, power machinery, and railway transport. Its applications are extensive and diverse:
Beyond these examples, abrasion-resistant steel is also used in any mechanical parts where relative motion occurs, leading to wear. Whether in mining or cement mills, the grinding media (balls, rods, and liners) are heavily consumed steel wear components. In the United States, 97% of grinding balls are made from carbon steel and alloy steel, and in Canada, steel balls account for 81% of grinding media consumption. In China, the annual consumption of grinding balls is estimated at 800,000 to 1 million tons, with mill liners consuming nearly 200,000 tons annually. Additionally, scraper conveyor middle troughs used in coal mines consume 60,000 to 80,000 tons of steel plates each year.
Currently, wear-resistant steel under 6mm thickness is primarily used in lightweight dumper truck carriages, with the thinnest available specification being 3mm. This steel offers superior shape and bending properties, ranking among the top levels in the domestic market (the only dumper carriage with 3mm wear-resistant steel for both side walls and bottom plates). The advantages of wear-resistant dump trucks compared to traditional trucks are:
1. Significant weight reduction: up to 50% lighter compared to 345 MPa steel and 33% lighter compared to 700 MPa steel, leading to lower energy consumption.
2. Enhanced wear resistance: 3.5 times more durable than standard materials, resulting in a longer service life and lower maintenance costs.
3. Improved anti-impact performance, offering greater protection against damage under various working conditions.
| Abrasion Resistant Steel Plate Sheet and Strip | ||||||||||||
| NO. | Grade | Chemical Composition (Mass Fraction) /% | ||||||||||
| C | Si | Mn | P | S | Cr | Ni | Mo | Ti | B | Als | ||
| โค | โฅ | |||||||||||
| 1 | AR300 | 0.23 | 0.70 | 1.60 | 0.025 | 0.015 | 0.80 | 0.50 | 0.40 |
0.050 |
0.0005~0.0060 | 0.010 |
| 2 | AR360 | 0.25 | 0.70 | 1.60 | 0.025 | 0.015 | 0.90 | 0.50 | 0.50 | 0.050 | 0.0005~0.0060 | 0.010 |
| 3 | AR400 | 0.30 | 0.70 | 1.60 | 0.025 | 0.010 | 1.20 | 0.70 | 0.50 | 0.050 | 0.0005~0.0060 | 0.010 |
| 4 | AR450 | 0.35 | 0.70 | 1.70 | 0.025 | 0.010 | 1.40 | 0.80 | 0.55 | 0.050 | 0.0005~0.0060 | 0.010 |
| 5 | AR500 | 0.38 | 0.70 | 1.70 | 0.020 | 0.010 | 1.50 | 1.00 | 0.65 | 0.050 | 0.0005~0.0060 | 0.010 |
| 6 | AR550 | 0.38 | 0.70 | 1.70 | 0.020 | 0.010 | 1.50 | 1.50 | 0.70 | 0.050 | 0.0005~0.0060 | 0.010 |
| 7 | AR600 | 0.45 | 0.70 | 1.90 | 0.020 | 0.010 | 1.60 | 2.00 | 0.80 | 0.050 | 0.0005~0.0060 | 0.010 |
| ย ย ย Through mutual agreement between the supplier and the buyer, the Si and Mn content may be increased to 2.00% and 2.50%, respectively. In this case, the lower limit for the B content in the steel may not be required. | ||||||||||||
| Abrasion Resistant Steel with Low-Temperature Toughness | ||||||||||||||
| NO. | Grade | Chemical Composition (Mass Fraction) /% | ||||||||||||
| C | Si | Mn | P | S | Cr | Ni | Mo | Ti | B | Als | CEV โค |
|||
| โค | โฅ | Nominal Thickness โค50 mm |
Nominal Thickness >50 ย ย mm |
|||||||||||
| 1 | NM300D/E | 0.23 | 0.70 | 1.60 | 0.020 | 0.010 | 0.80 | 0.60 | 0.40 | 0.050 | 0.0005~0.0060 | 0.015 | 0.45 | 0.57 |
| 2 | NM360D/E | 0.25 | 0.70 | 1.60 | 0.020 | 0.010 | 0.90 | 0.70 | 0.50 | 0.050 | 0.0005~0.0060 | 0.015 | 0.48 | 0.60 |
| 3 | NM400D/E | 0.25 | 0.70 | 1.60 | 0.020 | 0.005 | 1.20 | 0.70 | 0.60 | 0.050 | 0.0005~0.0060 | 0.015 | 0.57 | 0.67 |
| 4 | NM450D/E | 0.30 | 0.70 | 1.70 | 0.020 | 0.005 | 1.40 | 1.00 | 0.60 | 0.050 | 0.0005~0.0060 | 0.015 | 0.59 | 0.74 |
| 5 | NM500D/E | 0.35 | 0.70 | 1.70 | 0.015 | 0.005 | 1.50 | 1.50 | 0.65 | 0.050 | 0.0005~0.0060 | 0.015 | 0.64 | 0.77 |
| 6 | NM550D/E | 0.38 | 0.70 | 1.70 | 0.015 | 0.005 | 1.50 | 1.50 | 0.70 | 0.050 | 0.0005~0.0060 | 0.015 | 0.72 | 0.82 |
| 7 | NM600D/E | 0.45 | 0.70 | 1.90 | 0.015 | 0.005 | 1.60 | 2.00 | 0.80 | 0.050 | 0.0005~0.0060 | 0.015 | 0.84 | 0.94 |
High Hardness:ย Abrasion-resistant steel is characterized by its high hardness, typically ranging from 400 to 500 Brinell Hardness (HB), which provides excellent resistance to wear and impact.
Tensile Strength:ย With superior tensile strength, this steel can endure significant stress and strain without deforming, making it ideal for high-impact applications.
Longer Service Life:ย The exceptional durability of abrasion-resistant steel extends the lifespan of components, reducing the frequency of replacements and repairs.
Corrosion Resistance:ย In addition to wear resistance, certain grades of abrasion-resistant steel offer enhanced corrosion resistance, making them suitable for use in harsh environments.
Workability:ย Despite its hardness, abrasion-resistant steel can be cut, welded, and machined with the right tools and techniques, allowing for versatile applications.
Abrasion-resistant steel is primarily produced through electric furnace or converter steelmaking, with most products being castings. However, in recent years, the use of forged and rolled products has increased. The production methods of abrasion-resistant steel components used in general machinery are similar to those of other workpieces, with specific requirements for heat treatment or surface treatment processes to ensure the necessary wear resistance.
For steel components where the purity of the material significantly affects wear resistance, refining measures should be implemented, and limits on harmful impurities and gases should be established. The quantity, shape, and distribution of secondary phases, in addition to the matrix, often have a significant impact on the wear resistance of steel components. Therefore, the chemical composition, steelmaking process, hot working, and heat treatment (including thermomechanical processing) should be carefully considered to improve wear resistance through metallurgical factors.
Wear occurs on the surface of workpieces, making surface hardening essential. Surface hardening techniques for steel have a long history. For instance, the carburizing process dates back over two thousand years to China’s Han Dynasty, and more than a thousand years ago, Chinese records mentioned carbonitriding. In recent decades, surface hardening technologies and equipment have rapidly developed. Implementing necessary surface hardening and modification measures can save raw materials and impart specialized microstructures and properties to the surface layers of workpieces that are difficult to achieve with bulk materials. This leads to optimal wear resistance and substantial economic benefits. Today, surface hardening has become a key research and application area for abrasion-resistant steel and materials.
The development of surface hardening (lubrication) techniques for steel materials has accelerated in recent years, with a continuous emergence of new technologies and processes. Depending on specific needs, different surface hardening techniques can be selected to enhance the wear resistance of steel components under various wear conditions. This allows for the use of cost-effective base materials in place of expensive alloy steels. Processes such as carburizing, carbonitriding, and nitriding remain the primary methods for strengthening mechanical parts. Techniques like co-infiltration, composite infiltration, boriding, metal infiltration, spray welding, overlay welding, vapor deposition, brush plating, and ion implantation have shown significant improvements in wear resistance under various operating conditions. Additionally, casting infiltration and composite casting techniques are also applied in the manufacturing of abrasion-resistant steel components.
