High Strength Steel

High strength steel hardfacing plates combine a tough steel substrate with a super-hard chromium carbide overlay.
This engineered structure delivers exceptional hardness, high load capacity, and long service life, making it one of the most effective wear-resistant materials used in heavy industry.

High strength steel hardfacing plates, also known as welded wear plates or chromium carbide overlay (CCO) plates, are engineered materials designed to operate under extreme abrasion, impact and heavy load.
They are manufactured by welding a high-alloy wear-resistant layer onto a high-strength steel base plate, creating a composite structure that combines hardness and toughness.

Material Structure

A hardfacing plate consists of two layers:

Layer Function
Wear layer (overlay) Provides extreme abrasion resistance
Base steel plate Provides structural strength and impact resistance

The wear layer contains large amounts of chromium and carbon, which form chromium carbide crystals during welding.

Chemical Composition of Wear Layer

Element Typical Range
Carbon (C) 3.0 – 5.5%
Chromium (Cr) 18 – 28%
Manganese (Mn) 0.5 – 2.0%
Silicon (Si) 0.5 – 2.0%
Iron (Fe) Balance

These elements generate a dense network of hard chromium carbides, which gives the plate its extreme wear resistance.

Mechanical Performance

Property Typical Value
Surface hardness HRC 55 – 65
Microhardness of carbides Up to HV 1800
Abrasion resistance 6–10 times higher than carbon steel
Impact resistance Supplied by base plate
Load bearing capacity High
Thermal stability Up to 400–600°C

High Strength Base Plate

The substrate is usually high-strength carbon or alloy steel, providing:

  • High tensile strength

  • Excellent toughness

  • Resistance to cracking

  • Ability to be welded and bolted

This base allows the hard wear layer to survive heavy mechanical stress.

Standard Plate Sizes

Hardfacing wear plates are available in many formats:

Item Range
Standard sheet size 1500 × 3000 mm
1220 × 2440 mm
Thickness of base plate 4 – 25 mm
Thickness of overlay 2 – 12 mm
Total thickness 6 – 35 mm

Plates can be cut, bent, drilled and welded to match equipment design.

Typical Applications

High strength welded wear plates are used in:

  • Mining and quarry equipment

  • Cement plants

  • Coal handling systems

  • Power plants

  • Steel mills

  • Bulk material conveyors

These systems require both mechanical strength and extreme wear resistance.

High Strength Steel

High Strength Steel

High Strength Steel