Dillidur 400V Wear-Resistant Steel: Know About Its Properties, Uses & More

If you’re in industries like mining, construction, or agriculture, you know how frustrating and costly equipment wear can be. Replacing parts like excavator buckets or plow blades every few months eats into profits and slows down work. That’s where Dillidur 400V wear-resistant steel comes in. It’s a tough, reliable material designed to stand up to heavy abrasion—keeping your machinery running longer and saving you money. In this guide, we’ll cover everything from its chemical makeup to real-world success stories, so you can decide if it’s right for your needs.

1. Material Properties of Dillidur 400V: Why It’s So Durable

Dillidur 400V’s strength comes from its carefully balanced composition and unique properties. Let’s break it down into four key areas:

Chemical Composition

The alloying elements in Dillidur 400V work together to boost its wear resistance and toughness. Here’s a typical breakdown and what each element does:

Physical Properties

These properties affect how Dillidur 400V behaves in different environments (like temperature changes or magnetic handling):

• Density: ~7.85 g/cm³ (same as most carbon steels, so it’s easy to replace old parts without redesigning equipment).
• Thermal conductivity: ~44 W/(m·K) (dissipates heat well, which is key for high-friction parts like crusher liners).
• Thermal expansion coefficient: ~13 × 10⁻⁶/°C (minimizes warping when heated, keeping parts in shape).
• Specific heat capacity: ~470 J/(kg·K) (handles temperature swings without damage, ideal for outdoor use).
• Magnetic properties: Ferromagnetic (works with magnetic tools for lifting or positioning parts in factories).

Mechanical Properties

These are the “workhorse” traits that make Dillidur 400V perfect for heavy-duty jobs:

• Tensile strength: ≥ 1,250 MPa (can handle extreme pulling forces without breaking).
• Yield strength: ≥ 1,000 MPa (resists permanent bending or deformation under heavy loads).
• Hardness: 380–420 HBW (Brinell), ~40 HRC (Rockwell), or ~400 HV (Vickers)—hard enough to resist daily wear.
• Impact toughness: ≥ 30 J at -40°C (stays tough even in freezing conditions, so parts don’t crack in winter).
• Fatigue strength: Resists damage from repeated stress (great for parts like conveyor belts that run nonstop).
• Abrasion resistance: 2–3 times higher than standard structural steel (the main reason it lasts longer than regular steel parts).

Other Properties

• Corrosion resistance: Moderate (works well in dry or slightly wet conditions; add a coating for rainy or humid environments).
• Weldability: Good (with proper preheating and low-hydrogen electrodes, it can be welded to other steels easily).
• Machinability: Requires carbide tools (due to its hardness, but still manageable with the right equipment).
• Hardenability: Excellent (the hard surface goes deep into the steel, not just a thin layer—so it doesn’t wear through fast).

2. Applications of Dillidur 400V: Where It Works Best

Dillidur 400V is used across industries where abrasion is a major problem. Here are the most common uses:

Mining Industry

Mining equipment faces constant wear from rocks, ore, and dirt. Dillidur 400V is ideal for:

• Excavator buckets: Handles digging through hard rock without wearing down the bucket’s base.
• Shovel teeth: Resists chipping and grinding when loading heavy ore.
• Crusher liners: Protects the crusher’s inner walls from the impact of crushing stones.
• Grinding mill liners: Lasts twice as long as standard liners, cutting down on replacement time.

Construction Industry

Construction sites involve moving gravel, dirt, and debris—all of which wear down equipment. Dillidur 400V is used for:

• Bulldozer blades: Stands up to scraping against concrete or rocky soil.
• Loader buckets: Carries heavy loads of gravel without wearing thin.
• Dump truck beds: Prevents damage from sharp rocks or construction waste.
• Earthmoving equipment: Parts like rippers and scrapers stay functional longer.

Agricultural Industry

Farm machinery deals with soil, crops, and debris. Dillidur 400V works for:

• Plows: Resists wear from tough soil or hidden rocks in fields.
• Harrows: Maintains sharpness for tilling season after season.
• Combine harvesters: Protects parts that handle grain and straw.
• Grain handling equipment: Prevents scratches on chutes that move grain.

Recycling Industry

Recycling plants process metal, plastic, and waste—all of which wear down equipment. Dillidur 400V is used for:

• Shredders: Handles shredding metal or plastic without dulling.
• Crushers: Breaks down waste without damaging the crusher’s parts.
• Conveyors: Belt supports and guides resist wear from moving materials.
• Baling machines: Presses waste into bales without wearing the machine’s plates.

Industrial Applications

In factories and plants, Dillidur 400V protects equipment that moves or processes materials:

• Hoppers: Prevents clogging and wear from powders or granules (like cement or coal).
• Chutes: Guides materials without scratching or wearing down.
• Wear plates: Lines equipment to add a protective layer.
• Piping systems: Transports abrasive materials (like sand) without leaks or damage.

3. Manufacturing Techniques for Dillidur 400V

Making Dillidur 400V requires precise steps to ensure its strength and wear resistance. Here’s how it’s done:

1. Steelmaking Process

• Electric Arc Furnace (EAF): The most common method. Scrap steel is melted in an EAF, and alloying elements (like Cr and Mo) are added to reach the right composition.
• Basic Oxygen Furnace (BOF): Used for large-scale production. Iron ore is converted to steel, then alloyed to meet Dillidur 400V’s specs.

2. Rolling Process

• Hot rolling: The steel is heated to ~1,100–1,200°C and rolled into plates of different thicknesses (from 3mm to 100mm). This shapes the steel and makes its grain structure stronger.
• Cold rolling: Optional for thin plates. It smooths the surface and increases hardness slightly, but hot rolling is more common for Dillidur 400V’s heavy-duty use.

3. Heat Treatment

This step is crucial for Dillidur 400V’s hardness and toughness:

• Quenching: The hot-rolled steel is rapidly cooled in water or oil. This creates a hard, martensitic structure.
• Tempering: The quenched steel is heated to ~250–350°C and cooled slowly. This reduces brittleness while keeping high hardness.
• Normalizing: Sometimes used before quenching to make the grain structure uniform, ensuring consistent performance.

4. Surface Treatment

• Shot blasting: Removes rust and scale from the surface, preparing it for welding or coating.
• Grinding: Creates a smooth surface for applications where precision is key (like conveyor parts).
• Coating: Options include paint or galvanizing (for extra corrosion resistance in wet environments).

5. Quality Control

Every batch of Dillidur 400V is tested to meet standards:

• Chemical analysis: Uses spectrometry to check the levels of C, Cr, Mo, and other elements.
• Mechanical testing: Includes tensile tests, hardness tests, and impact tests to verify strength and toughness.
• Non-destructive testing (NDT): Uses ultrasonic or magnetic particle testing to find hidden cracks or defects.

4. Case Studies: Dillidur 400V in Real Life

Real-world examples show how Dillidur 400V saves time and money. Here are three stories:

Case Study 1: Mining Excavator Buckets

Application Background: A Canadian mining company was replacing excavator buckets every 4 months. Each replacement cost $20,000 and took 2 days of downtime. Performance Improvement: They switched to Dillidur 400V buckets. The buckets lasted 10 months—more than twice as long. Cost-Benefit Analysis: Saved $30,000/year (fewer replacements) and cut downtime by 6 days/year. The extra cost of Dillidur 400V was paid off in 3 months.

Case Study 2: Construction Loader Buckets

Application Background: A German construction company’s loader buckets wore out after 5 months of moving gravel.
Performance Improvement: They used Dillidur 400V for new buckets. The buckets lasted 12 months—no more frequent replacements.
Cost-Benefit Analysis: Saved $8,000/year (each bucket costs $1,500; they went from 2.4 replacements/year to 1).

Case Study 3: Agricultural Plow Blades

Application Background: A U.S. farm’s plow blades dulled after 2 seasons of tilling hard soil.
Performance Improvement: They switched to Dillidur 400V blades. The blades lasted 5 seasons—more than double the original life.
Cost-Benefit Analysis: Saved $1,200/year (each set of blades costs $300; they went from 1.5 sets/year to 0.4).

5. Dillidur 400V vs. Other Wear-Resistant Materials

How does Dillidur 400V compare to other options? Let’s break it down:

Comparison with Other Dillidur Steels

Dillidur 400V is a mid-range option in the Dillidur series. Here’s how it stacks up against Dillidur 200, 300, and 400:

Note: Dillidur 400V has better impact toughness than Dillidur 400, making it better for cold weather.

Comparison with Non-Steel Materials

Dillidur 400V also competes with non-steel wear-resistant materials:

Key Takeaway: Dillidur 400V balances wear resistance, toughness, and cost better than most non-steel options. It’s more flexible than ceramics and more durable than polyurethane.

Yigu Technology’s Perspective on Dillidur 400V

At Yigu Technology, we often recommend Dillidur 400V to clients in cold climates or industries needing both wear resistance and toughness. Many of our mining and construction customers in northern regions switched to Dillidur 400V and saw fewer winter cracks and longer part life. It’s also easy to weld, which saves time during installation. For businesses looking for a reliable, cost-effective wear-resistant steel, Dillidur 400V is a top choice—it solves the problem of frequent part replacements without breaking the bank.

FAQ About Dillidur 400V Wear-Resistant Steel

1. Can Dillidur 400V be used in cold weather?
   Yes! Dillidur 400V has excellent impact toughness (≥ 30 J at -40°C), so it works well in freezing conditions like winter construction or northern mining operations.
2. Do I need special tools to machine Dillidur 400V?
   Yes, due to its high hardness, you’ll need carbide tools (instead of standard high-speed steel tools) to machine Dillidur 400V. This ensures clean cuts and longer tool life.
3. Is Dillidur 400V more expensive than regular steel?
   Yes, Dillidur 400V costs 1.5–2 times more than standard structural steel. But it lasts 2–3 times longer, so it saves money in the long run by reducing replacements and downtime. For high-wear parts, the extra cost is worth it.