Description
Dillidur 450 – High-Performance Wear Resistant Steel
Dillidur 450 is a high-strength, abrasion-resistant steel specifically designed to withstand extreme wear conditions. Ideal for applications in industries requiring a combination of toughness and hardness, Dillidur 450 provides enhanced performance in a variety of environments. Below, we break down its specifications, chemical composition, mechanical properties, and much more.
Specification:
- Grade: Dillidur 450
- Type: Wear-resistant steel
- Surface Hardness: Approximately 450 HB
- Applications: Mining, construction, material handling, and quarrying industries
- Delivery Condition: Quenched and tempered
Dillidur 450 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 2.5 - 3.5 |
| Chromium (Cr) | 25 - 30 |
| Manganese (Mn) | 3.0 - 5.0 |
| Silicon (Si) | 0.5 - 2.0 |
| Nickel (Ni) | 1.0 - 3.0 |
| Iron (Fe) | Balance |
Dillidur 450 Mechanical Properties
| Property | Value |
|---|---|
| Hardness | ~450 HB |
| Tensile Strength | ~1000 - 1200 MPa |
| Yield Strength | ~700 - 900 MPa |
| Elongation | ~5 - 10% |
| Impact Toughness | Moderate (depends on specific conditions) |
| Density | ~7.6 g/cm³ |
Dillidur 450 Physical Properties
| Property | Value |
|---|---|
| Density | ~7.6 g/cm³ |
| Melting Point | ~1450 - 1550 °C |
| Thermal Conductivity | ~25 W/m·K |
| Coefficient of Thermal Expansion | ~11 × 10⁻⁶ /°C |
| Electrical Conductivity | Low (not typically specified) |
Possible Alternative Grades Table:
| Alternate Grade | Characteristics |
|---|---|
| Hardox 450 | Offers similar wear resistance and toughness for harsh applications |
| Raex 450 | Another alternative with high hardness and resistance to wear |
| Bisalloy 450 | A comparable grade with a focus on durability in abrasive environments |
Chemical Formula
C₀.₄₀Fe₉₄.₆₀Mn₁.₂₄Cr₀.₁₂Mo₀.₃₄
Grade Specification Comparison Table
| Property/Grade | Dillidur 450 | Hardox 450 | Raex 450 | Bisalloy 450 |
|---|---|---|---|---|
| Yield Strength | 1000 MPa | 950 MPa | 980 MPa | 1100 MPa |
| Tensile Strength | 1200 MPa | 1250 MPa | 1180 MPa | 1200 MPa |
| Hardness | 450 HB | 450 HB | 450 HB | 450 HB |
| Elongation | 5% | 4% | 4% | 6% |
Corrosion Resistance
Dillidur 450, being a high-strength steel, offers limited corrosion resistance in highly corrosive environments like marine atmospheres or exposure to chemicals. However, it performs well in industrial applications where the primary concern is wear resistance. For enhanced corrosion protection, additional surface treatments like galvanizing or coating may be required.
Heat Resistance
Dillidur 450 can withstand high temperatures, but its mechanical properties may begin to degrade when exposed to sustained temperatures above 500°C. Its primary application is in environments where the material faces abrasive conditions rather than extreme heat exposure. For higher heat resistance, other alloy steels or materials may be considered.
Heat Treatment
- Tempering: Dillidur 450 undergoes a tempering process to achieve its optimal hardness and wear resistance.
- Quenching: The steel is heated to high temperatures, followed by rapid cooling in water or oil to develop hardness.
- Preheating for Welding: Preheating the material to around 150-250°C is recommended to avoid cracking during welding.
Welding
Welding of Dillidur 450 requires careful consideration due to its high carbon content and hardness. It is advised to use low-heat input methods like TIG or MIG welding to minimize the risk of cracking. The use of wear-resistant filler materials is recommended to preserve the steel’s properties after welding.
Fabrication
Dillidur 450 can be cut, drilled, and machined, but its high hardness makes it more challenging compared to regular mild steels. CNC machines with appropriate tools and slow cutting speeds are generally used for fabrication. When drilling or machining, carbide or high-speed steel tools are recommended to achieve the best results.
Applications
Dillidur 450 is ideal for applications where high wear resistance is required, such as:
- Mining Equipment: Crushers, chutes, and liners
- Construction: Excavator buckets, diggers, and material handling machinery
- Material Handling: Conveyors, hoppers, and loaders
- Quarrying: Jaw plates and other abrasive-resistant components
- Agriculture: Components exposed to heavy wear from soil and rock.
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