AR450 Steel
AR450 Abrasion Resistant Steel
AR450 Abrasion Resistant Steel is a high hardness wear-resistant steel plate designed to provide superior resistance against abrasion, impact, and sliding wear. With a typical hardness of around 450 Brinell Hardness (HB), AR450 steel offers higher durability and longer service life compared to lower hardness grades such as AR400.
AR450 plates are widely used in industries that operate in extremely abrasive environments such as mining, quarrying, material handling, construction, and cement production. The steel combines high strength with excellent toughness, making it suitable for heavy-duty equipment that must endure constant friction and impact.
Due to its enhanced hardness, AR450 steel significantly improves equipment lifespan, reduces maintenance costs, and minimizes operational downtime.
AR450 Steel Plate
Key Features
- High hardness of approximately 450 HB
- Excellent abrasion and wear resistance
- Good impact toughness
- Extended service life in harsh environments
- Good weldability with proper procedures
- Suitable for heavy-duty industrial equipment
- Reduced maintenance and replacement costs
- High strength and durability
AR450 Plate Available Size Range
| Thickness | Width | Length |
|---|---|---|
| 4 mm – 12 mm | 1250 mm – 2000 mm | 2500 mm – 6000 mm |
| 15 mm – 40 mm | 1500 mm – 2500 mm | 6000 mm – 9000 mm |
| 45 mm – 100 mm | 2000 mm – 3000 mm | 9000 mm – 12000 mm |
AR450 Plate Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.20 – 0.28 |
| Manganese (Mn) | 0.70 – 1.60 |
| Silicon (Si) | 0.15 – 0.50 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.010 |
| Chromium (Cr) | 0.40 – 1.50 |
| Nickel (Ni) | 0.25 – 1.00 |
| Molybdenum (Mo) | 0.20 – 0.60 |
| Boron (B) | Trace |
AR450 Mechanical Properties
| Property | Value |
|---|---|
| Hardness | 420 – 480 HB |
| Yield Strength | ≥ 1100 MPa |
| Tensile Strength | 1300 – 1700 MPa |
| Elongation | 8 – 10 % |
| Impact Toughness | Good |
AR450 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1425 – 1540 °C |
| Thermal Conductivity | 40 – 50 W/mK |
| Modulus of Elasticity | 210 GPa |
Corrosion Resistance
AR450 abrasion resistant steel provides moderate corrosion resistance, similar to standard carbon steels. While it is primarily designed for abrasion resistance rather than corrosion resistance, it performs well in dry and moderately humid environments.
For highly corrosive environments, protective coatings, painting, or galvanizing may be recommended to enhance corrosion protection.
Heat Resistance
AR450 steel can withstand moderate operating temperatures. However, prolonged exposure to high temperatures above 250–300°C may reduce its hardness and wear resistance. Therefore, AR450 plates are generally used in environments where abrasion resistance is required at normal or moderately elevated temperatures.
Heat Treatment
AR450 plates are usually supplied in quenched and tempered condition, which provides the required hardness and toughness.
Typical heat treatment process includes:
- Austenitizing at high temperature
- Rapid quenching in water or oil
- Tempering to achieve the desired hardness and mechanical properties
Additional heat treatment is generally not recommended as it may affect the hardness of the material.
Welding
AR450 steel has good weldability when appropriate welding procedures are followed.
Recommended welding practices include:
- Preheating depending on plate thickness
- Using low hydrogen electrodes
- Controlling heat input to prevent hardness reduction
- Post weld stress relief if required
Common welding methods include MIG, TIG, and Shielded Metal Arc Welding (SMAW).
Fabrication
Despite its high hardness, AR450 steel can be fabricated using standard industrial processes.
Common fabrication methods include:
- Plasma cutting
- Laser cutting
- Waterjet cutting
- Machining
- Bending with appropriate equipment
- Forming and shaping
Proper tooling and process control are necessary due to the high hardness of the material.
Applications
- Mining and quarry equipment
- Dump truck bodies
- Excavator buckets and loaders
- Crushers and screening equipment
- Chutes, hoppers, and bins
- Conveyor liners and wear plates
- Cement plant machinery
- Agricultural equipment
- Material handling systems
- Construction and earthmoving machinery