Hard Wearing Steel Plate

Weld-overlay hard wearing steel plate combines metallurgical bonding, high hardness, and carbide reinforcement, making it one of the most reliable solutions for combating wear in heavy-duty industries. By integrating a strong base metal with a hard facing layer, it achieves the perfect balance between strength, toughness, and surface durability — ideal for extending equipment life in demanding environments.

Category: Chromium Carbide Overlay Plate

Description

A hard wearing steel plate is a type of wear-resistant material designed to withstand severe abrasion, impact, and erosion. Among various wear solutions, weld-overlay plates—also known as chromium carbide overlay (CCO) plates—are widely recognized for their superior performance in harsh industrial environments.

Why Weld-Overlay Materials Can Be Used as Wear-Resistant Steel

Weld-overlay materials are created by depositing a layer of hard alloy (such as chromium carbide or complex carbide) onto a steel base plate through a controlled welding process. This forms a metallurgical bond between the two layers, giving the plate a unique combination of properties: a tough and ductile base for structural support, and an extremely hard surface for wear protection.

The overlay layer contains a high concentration of chromium and carbon, which react during welding to form hard carbides (Cr₇C₃) uniformly distributed in the microstructure. These carbides are harder than most abrasives, giving the surface exceptional wear resistance even under high-stress and sliding conditions.

Typical Properties of Hard Wearing Weld-Overlay Plates

Property / Feature	Typical Range / Description	Benefit in Wear Applications
Surface Hardness	58 – 65 HRC	Provides excellent resistance to sliding and gouging wear.
Alloy Composition (Cr + C content)	25 – 35% Cr, 4 – 6% C	Promotes formation of dense chromium carbides (Cr₇C₃).
Base Plate Material	Mild steel (Q235 / ASTM A36)	Ensures good toughness and easy fabrication.
Bonding Type	Metallurgical bond (weld overlay)	Prevents delamination under heavy impact or vibration.
Service Temperature	Up to 600°C	Maintains hardness and stability at elevated temperatures.
Typical Overlay Thickness	3 – 10 mm	Adjustable according to the severity of the wear environment.

Advantages of Weld-Overlay Hard Wearing Plates

Extended service life: The hard overlay layer resists abrasion far longer than conventional AR steel.
Structural strength: The mild steel base plate allows easy cutting, bending, and welding during fabrication.
Cost efficiency: Longer wear life means reduced maintenance frequency and lower downtime.
Custom adaptability: Overlay thickness and plate size can be tailored for specific working conditions.
Thermal and impact resistance: Suitable for applications involving high impact and moderate heat.