Hard Facing Plate

Hard Facing Plate Complete Guide: What It Is, How It Works and Where to Use It

Hard facing plate is one of the most widely used wear protection materials in industries where equipment faces severe abrasion, impact, and sliding wear. Unlike ordinary wear-resistant steel plates, hard facing plates combine a tough steel base with an extremely hard wear-resistant alloy layer to achieve longer service life.

For new buyers, understanding the basic structure, manufacturing methods, hardness range, and application fields is the first step before selecting the right wear solution.

This guide explains what hard facing plate is, how it works, which production technologies are available, and where it delivers the highest value.

1. What Is Hard Facing Plate?

Hard facing plate is a bi-metallic wear-resistant composite plate manufactured by depositing a high-hardness alloy layer onto a low-carbon steel or low-alloy steel base plate through welding or cladding technology.

The structure usually consists of two layers:

Layer	Main Function	Material Characteristics
Base Plate	Provides support and impact resistance	Tough, weldable, easy to fabricate
Hard Facing Layer	Provides wear protection	High hardness, abrasion resistance

The design principle is simple:

• The steel base absorbs impact and mechanical stress.
• The hard alloy surface sacrifices itself against wear.
• The equipment achieves longer operating life with less maintenance.

2. How Hard Facing Plate Works

Traditional steel components often fail because the surface wears away faster than the structure can tolerate.

Hard facing plates solve this problem by separating two requirements:

Requirement	Solution
High wear resistance	Hard alloy surface layer
Impact resistance	Tough steel backing plate
Easy installation	Weldable composite structure

This combination allows hard facing plates to outperform normal carbon steel and many conventional wear plates in extreme abrasion conditions.

3. Hard Facing Plate Structure and Materials

The overlay layer is usually based on chromium-rich wear alloys containing:

• Chromium carbide particles
• Carbon
• Molybdenum
• Nickel
• Other alloy strengthening elements

During solidification, hard carbide phases form inside the metallic matrix, creating exceptional resistance against abrasive particles.

Characteristic	Typical Range
Overlay Hardness	HRC 50-65
Base Plate	Mild steel / low alloy steel
Overlay Thickness	Commonly 3-15 mm
Wear Resistance	Several times higher than ordinary steel

4. Four Main Hard Facing Production Technologies

Different cladding methods create different performance characteristics.

4.1 Submerged Arc Welding (SAW)

SAW is one of the most common industrial hard facing processes because it provides high deposition efficiency and stable quality.

Advantages:

• High production capacity
• Uniform overlay thickness
• Suitable for large plates

Typical applications:

• Mining equipment
• Cement machinery
• Large industrial hoppers

4.2 Open Arc Welding

Open arc cladding does not require external shielding gas and is widely used for flexible production.

Advantages:

• Lower equipment requirements
• Suitable for customized sizes
• Good field repair capability

4.3 Plasma Transfer Arc (PTA)

PTA provides precise heat control and is used where high-quality metallurgical bonding is required.

Advantages:

• Low dilution rate
• Excellent surface quality
• Precise alloy control

4.4 Laser Cladding

Laser cladding is an advanced technology using concentrated laser energy to create a high-precision wear-resistant layer.

Advantages:

• Minimal heat distortion
• High bonding quality
• Suitable for precision components

5. Hard Facing Plate vs Traditional Wear Steel

Material	Main Advantage	Best Application
Hard Facing Plate	Extreme surface wear resistance	Severe abrasion environments
NM400/NM500 Wear Plate	Balanced hardness and toughness	Impact + abrasion conditions
Mild Steel	Low cost and easy fabrication	Low wear applications

For pure sliding abrasion, hard facing plates often provide better lifecycle value because the wear layer hardness is significantly higher.

6. Hard Facing Plate Application Map

Hard facing plates are widely used across industries where material flow causes continuous wear.

Industry	Typical Components	Wear Type
Mining	Chutes, hoppers, crushers	Rock impact and abrasion
Cement	Conveyor liners, mill components	Mineral abrasion
Power Generation	Coal handling systems	Particle erosion
Steel Industry	Material transfer equipment	High-temperature abrasion
Ports	Loading equipment, buckets	Sand and ore wear

7. How to Select the Right Hard Facing Plate

Before purchasing, buyers should evaluate:

• Wear type: sliding, impact, erosion, or combined wear
• Operating temperature
• Required hardness level
• Overlay thickness
• Base plate strength
• Fabrication requirements

A higher hardness value is not always the best solution. Extremely hard overlays may require careful consideration in high-impact environments.

8. Common Hard Facing Plate Purchasing Mistakes

• Choosing only by hardness number
• Ignoring base plate toughness
• Using thin overlay thickness for severe wear
• Comparing price per ton instead of service life
• Buying without checking welding quality

9. Hard Facing Plate Solutions from Teda Ganghua

Teda Ganghua supplies advanced wear-resistant solutions for mining, cement, steel, power, and heavy industrial applications.

Our wear protection products include:

• Chromium carbide overlay plates
• Customized wear-resistant composite plates
• Industrial abrasion protection solutions
• Customized thickness, size, and processing options

With professional material selection support, Teda Ganghua helps customers choose the right wear protection solution based on abrasion conditions, impact level, and equipment operating environment.

Learn more:

Chromium Carbide Overlay Plate

Conclusion

Hard facing plate is a high-performance wear solution that combines a tough steel base with an ultra-hard alloy surface. By separating structural strength from surface hardness, it provides longer service life in the most demanding industrial environments.

For mining, cement, power, steel, and port industries, selecting the correct hard facing technology and overlay specification can significantly reduce downtime, maintenance costs, and equipment replacement frequency.