AR400

Introduction

AR400 Abrasion Resistant Steel is a high-hardness wear-resistant steel designed for industrial applications exposed to severe abrasion, friction, sliding wear and mechanical impact. With a nominal hardness of approximately 400 HBW , AR400 provides significantly greater resistance to abrasive wear than conventional structural steels.

AR400 steel plates are widely used in mining, quarrying, construction, cement, recycling, material handling, agriculture and heavy equipment manufacturing .

The designation AR400 generally refers to an abrasion-resistant hardness class or commercial designation rather than one universally standardized chemical composition. Therefore, the exact chemical composition, hardness range and mechanical properties should always be verified against the applicable manufacturer’s specification and Mill Test Certificate (MTC) .

Emirerri Steel supplies AR400 abrasion-resistant steel plates and wear-resistant products for demanding industrial applications.

Key Features 

• Nominal hardness of approximately 400 HBW

• High resistance to abrasive wear

• Excellent resistance to mechanical surface wear

• Good impact resistance depending on specification

• Good balance of hardness and toughness

• Suitable for severe abrasion environments

• Weldable using appropriate welding procedures

• Suitable for controlled cutting and fabrication

• Available as wear plates and manufactured components

• Suitable for mining and heavy industrial equipment

Specifications

*Indicative values ​​only. The guaranteed hardness range depends on the manufacturer, thickness and applicable specification.

AR400 Chemical Composition

AR400 does not have one universally fixed chemical composition. Manufacturers may use different alloying systems to achieve the required combination of hardness, wear resistance and toughness.

Typical alloying elements may include:

Important: Exact chemical limits must be confirmed from the applicable manufacturer’s specification and MTC.

AR400 Mechanical Properties

AR400 is primarily selected for its high hardness and abrasion resistance .

For abrasion-resistant steels, hardness alone should not determine material selection. Toughness, impact conditions, plate thickness, microstructure and the actual wear mechanism should also be considered.

AR400 Physical Properties

The physical properties of AR400 are generally comparable to those of low-alloy steels used for wear-resistant plate applications.

Actual values ​​may vary according to chemical composition, thickness and metallurgical condition.

AR400 Hardness

The primary characteristic of AR400 steel is its nominal hardness of approximately 400 HBW .

This high hardness provides resistance against several forms of mechanical wear, including:

• Sliding abrasion

• Impact abrasion

• Friction

• Scratching

• Material erosion

• Repeated contact

• Abrasive bulk materials

AR400 is therefore suitable for equipment where conventional mild or structural steel would experience rapid surface wear.

AR400 vs AR235

AR400 provides substantially higher abrasion resistance than AR235. However, its greater hardness also makes forming, machining and fabrication more demanding.

AR400 vs AR500

AR500 offers higher hardness and potentially greater abrasion resistance, while AR400 can provide a better balance between wear resistance, toughness and manufacturing requirements.

Types of AR400 Steel Products

AR400 can be supplied and manufactured in various forms depending on the application.

AR400 Wear Plates

Used for lining equipment exposed to severe abrasive conditions.

AR400 Steel Sheets

Suitable for industrial components requiring improved wear resistance.

Cut-to-Size AR400 Plates

AR400 plates can be cut according to customer drawings using suitable cutting processes.

AR400 Wear Liners

Used to protect equipment surfaces against continuous material flow and abrasive contact.

Fabricated 

AR400 can be manufactured into:

• Hopper liners

• Chute liners

• Wear plates

• Conveyor components

• Dump bodies

• Excavator components

• Loader components

• Mining equipment components

• Side plates

• Protective liners

Welding 

AR400 can generally be welded when suitable procedures are followed. Due to its high hardness and potentially high hardenability, welding requires greater process control than conventional mild steel.

Important considerations include:

• Preheating where required

• Interpass temperature control

• Suitable welding consumables

• Controlled heat input

• Hydrogen control

• Appropriate joint preparation

• Prevention of cold cracking

• Controlled cooling where required

For critical applications, welding procedures should be qualified according to the applicable code or project specification.

Cutting 

AR400 plates can be processed using suitable cutting methods, including:

• Plasma cutting

• Oxy-fuel cutting

• Laser cutting, depending on thickness

• Mechanical cutting

Thermal cutting parameters should be controlled to minimize excessive heat input, distortion and undesirable changes in the heat-affected zone.

For thick sections, preheating may be recommended according to the manufacturer’s requirements.

Machining 

Machining AR400 is more demanding than machining conventional structural steel because of its high hardness.

Recommended considerations include:

• Suitable carbide tooling

• Controlled cutting speeds

• Appropriate feed rates

• Adequate cooling where required

• Reduced vibration

• Regular monitoring of tool wear

Machining parameters should be selected according to the actual hardness, thickness, tooling and machining operation.

Forming 

Because of its high hardness, AR400 requires suitable equipment and tooling for bending and forming operations.

Important factors include:

• Plate thickness

• Actual hardness

• Minimum bending radius

• Rolling direction

• Press capacity

• Tool geometry

• Manufacturer recommendations

Hot forming should only be performed when permitted by the applicable material specification, since excessive heating can change the hardness and wear characteristics of the material.

Surface Finishes

AR400 plates may be supplied with different surface conditions depending on the application:

• As Rolled

• Shot Blasted

• Industrial Primed

• Pickled, where applicable

• Cut to Size

• Machined or Fabricated

Surface requirements should be specified at the enquiry or ordering stage.

Applications 

AR400 is particularly suitable for equipment operating under severe abrasive conditions.

Mining Industry

• Mining machinery

• Ore handling systems

• Chutes

• Hoppers

• Conveyor components

• Wear liners

• Material transfer systems

Quarrying

• Crushers

• Screening equipment

• Chutes

• Hoppers

• Wear plates

• Material handling equipment

Construction Equipment

• Excavator buckets

• Loader buckets

• Dump bodies

• Earthmoving equipment

• Wear components

Cement Industry

• Material handling equipment

• Hoppers

• Chutes

• Conveyors

• Storage systems

• Wear liners

Recycling Industry

• Crushers

• Recycling machinery

• Sorting equipment

• Conveyors

• Hoppers

• Wear components

Material Handling

• Silos

• Bins

• Hoppers

• Conveyors

• Transfer chutes

• Internal wear liners

Agriculture

• Agricultural machinery

• Soil-contact components

• Wear strips

• Processing equipment

• High-wear machine parts

Advantages of AR400

AR400 offers several advantages for demanding industrial applications:

1. High abrasion resistance

2. Nominal hardness of approximately 400 HBW

3. Longer service life in abrasive environments

4. Reduced component replacement frequency

5. Good impact resistance depending on specification

6. Suitable for welding with controlled procedures

7. Excellent suitability for mining and heavy industrial applications

8. Available in plates, sheets and cut-to-size components

Quality and Certification

AR400 steel plates for industrial applications can be supplied with quality documentation according to the applicable specification and purchase order.

Documentation may include:

• Mill Test Certificate (MTC)

• Chemical analysis

• Hardness test results

• Mechanical test results, where applicable

• Heat number traceability

• Dimensional inspection reports

• Material identification

• Third-party inspection documentation, when required

For critical projects, inspection, testing and certification requirements should be specified at the enquiry stage.

Why Choose AR400 Steel?

AR400 is an effective choice when equipment is exposed to severe abrasion and a longer service life than conventional structural steel is required.

Its approximately 400 HBW hardness provides strong resistance against sliding, frictional and abrasive wear.

Material selection should nevertheless consider:

• Type of abrasion

• Impact intensity

• Material being handled

• Plate thickness

• Operating temperature

• Welding requirements

• Fabrication method

• Required service life

Emirerri Steel – AR400 Abrasion Resistant Steel Supplier

Emirerri Steel supplies abrasion-resistant steel plates and wear-resistant products for demanding industrial applications.

Our wear-resistant steel solutions are suitable for industries including mining, quarrying, cement, construction, material handling, recycling, agriculture and general engineering.

AR400 plates can be offered in different thicknesses, dimensions, surface conditions and cut-to-size formats according to project requirements and material availability.

For a technical enquiry, customers can provide the required grade, thickness, dimensions, quantity, application, cutting requirements and inspection requirements.

Conclusion

AR400 Abrasion Resistant Steel is a high-hardness wear-resistant steel designed for demanding industrial environments where severe abrasion and mechanical wear can significantly reduce the service life of conventional steels.

With a nominal hardness of approximately 400 HBW, AR400 provides substantially higher abrasion resistance than lower-hardness grades such as AR235 while generally offering a more fabrication-friendly balance than higher-hardness grades such as AR500.

AR400 is widely used for wear plates, hopper liners, chute liners, mining equipment, conveyor components, dump bodies and other industrial wear applications.

As AR400 can be used as a hardness-class or commercial designation , the exact chemical composition, guaranteed hardness range, mechanical properties and applicable standard should always be confirmed from the manufacturer’s specification and Mill Test Certificate.