Ar 400 Plates

By Author: Mukesh Mehta
Total Articles: 50
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# AR 400 Plates – High-Performance Wear-Resistant Steel for Industrial Applications

## Introduction

AR 400 Plates are premium wear-resistant steel plates engineered for demanding industrial environments where high abrasion, impact, and mechanical stress are constant challenges. These plates are widely used across mining, construction, earthmoving, material handling, and heavy-duty fabrication industries.

In this article, you will gain an in-depth understanding of AR 400 Plates, including their composition, mechanical properties, types, industrial applications, standards, manufacturing process, and the advantages of partnering with a trusted global manufacturer.

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## What Is AR 400 Plates?

**AR 400 Plates** are abrasion-resistant, high-carbon, high-strength steel plates designed to withstand extreme wear and tear. The “400” designation refers to the Brinell hardness rating, which averages approximately 400 HBW, making them suitable for high-impact applications.

### Alloy Type and Grade

* Low-alloy, quench-and-tempered steel
* High hardness combined with exceptional ...
... toughness
* Comparable to grades like AR 450, AR 500 in higher hardness applications

### Standards and Designation

* ASTM A514 and A607 cover high-strength, abrasion-resistant steels
* UNS designations are not commonly assigned; grade identification is based on hardness and chemical composition
* Preferred over mild and structural steels in high-abrasion environments

AR 400 Plates are ideal for applications where resistance to wear is critical while maintaining structural integrity under load.

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## Properties & Advantages

### Chemical Composition & Mechanical Properties

A typical composition for AR 400 Plates:

| Element | Typical % |
| --------------- | --------- |
| Carbon (C) | 0.28–0.45 |
| Manganese (Mn) | 0.70–1.20 |
| Silicon (Si) | 0.40 max |
| Phosphorus (P) | ≤0.025 |
| Sulfur (S) | ≤0.020 |
| Chromium (Cr) | 0.30–0.80 |
| Nickel (Ni) | 0.25–0.60 |
| Molybdenum (Mo) | 0.20–0.40 |

Mechanical characteristics:

* Hardness: 360–440 HBW
* Yield strength: 900–1200 MPa
* Tensile strength: 1000–1350 MPa
* Impact toughness: Adequate for moderate-low temperature applications
* Exceptional wear resistance while maintaining formability

### Key Performance Benefits

* Outstanding resistance to abrasion and impact
* Extended service life in harsh environments
* Good weldability with appropriate preheat and post-weld treatments
* Reduced maintenance and operational downtime
* Suitable for heavy-duty fabrication, liners, and industrial wear plates

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## Types / Variants

AR 400 Plates are available in different variants to suit specific applications:

* Standard AR 400 Plates: Hardness ~400 HB, general wear-resistant applications
* Prehardened AR 400: Enhanced surface hardness for extreme abrasion
* AR 400 with custom thickness and tempering: Optimized for specific machinery or structural requirements

Each type ensures a balance of hardness and toughness suitable for mining, construction, and industrial machinery.

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## Standards & Specifications

### Material & Dimensional Standards

* ASTM A514, ASTM A607 (primary wear-resistant steel standards)
* EN 10025-6, DIN 1.8958 equivalents for international projects
* Custom tolerances available per project specifications

### Size & Thickness

* Thickness: 6 mm to 200 mm
* Width: 1000 mm to 4000 mm
* Length: 2000 mm to 12000 mm
* Custom sizes available for large-scale fabrication and machinery parts

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## Industrial Applications

**AR 400 Plates** are indispensable in high-abrasion environments:

* **Mining & Quarrying**: Chutes, crushers, hoppers, and conveyor liners
* **Construction Equipment**: Bulldozer blades, skid steer buckets, and grader blades
* **Material Handling**: Truck beds, dump bodies, and wear liners
* **Agricultural Machinery**: Plowshares, tillage equipment, and soil mixers
* **Industrial Fabrication**: Structural wear-resistant parts in machinery

These applications benefit from reduced wear, lower replacement costs, and improved operational efficiency.

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## Manufacturing Process

The production of AR 400 Plates involves rigorous processes to ensure hardness and toughness:

1. **Melting and Alloying**: Precise addition of carbon, manganese, nickel, chromium, and molybdenum
2. **Casting and Rolling**: Hot rolling for uniform grain structure
3. **Quenching and Tempering**: Achieves target Brinell hardness without compromising ductility
4. **Cutting and Finishing**: Plasma or laser cutting, edge milling, surface treatment
5. **Quality Control**:

* Chemical analysis to verify alloy composition
* Mechanical testing including hardness, tensile, and impact tests
* Dimensional verification
* Non-destructive testing for cracks and defects
6. **Third-Party Inspection**: BV, TUV, SGS certifications available
7. **Export Packaging**: Proper rust-proofing, slings, and documentation for international delivery

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## Why Choose a Trusted Manufacturer

Partnering with a reliable AR 400 Plates manufacturer ensures:

* Consistent hardness, mechanical properties, and dimensional accuracy
* Compliance with ASTM, ASME, EN, and ISO standards
* Full traceability from melting to delivery
* Global shipping experience and project support
* Long-term B2B partnerships with technical guidance

Request a quote or datasheet today to secure high-quality AR 400 Plates for your industrial projects.

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## FAQ Section

**Q1: What does AR 400 mean?**
It indicates Abrasion Resistant steel with a nominal Brinell hardness of 400 HBW.

**Q2: Can AR 400 Plates be welded?**
Yes, with proper preheat and post-weld heat treatment to avoid cracking.

**Q3: How thick can AR 400 Plates be supplied?**
Typically 6–200 mm, with custom thicknesses available for special applications.

**Q4: Are they suitable for outdoor or corrosive environments?**
Yes, but surface treatment or coatings are recommended for extreme corrosion conditions.

**Q5: How do AR 400 Plates compare to AR 500?**
AR 500 offers higher hardness (around 500 HB) for extremely abrasive conditions but may require more careful welding and fabrication.

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## Conclusion

**AR 400 Plates** deliver unmatched abrasion resistance, mechanical strength, and operational reliability for industries such as mining, construction, and heavy machinery. Their balance of hardness and toughness reduces downtime and maintenance costs while extending service life.

Partnering with a trusted global manufacturer ensures compliance with international standards, full traceability, and technical support for your projects. Contact the technical sales team today to request a quote or datasheet for AR 400 Plates.