What is Abrasion Resistant Steel Plate?

AR400 vs. AR450 vs. AR500: Understanding Abrasion Resistant Steel

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The grade and composition of steel plates used in construction and fabrication can significantly influence the final product's durability and performance. Abrasion resistant steel plate is renowned for its longevity, lasting up to four times longer than ordinary high-strength structural steel plates.

So, what makes this type of steel tougher, and how do you determine if your project requires it?

Let’s dive into the details of abrasion resistant steel plates and explore the differences in hardness between AR400, AR450, AR500, and other variants. You can also reach out to us for a quote on these plates.

Characteristics of Abrasion Resistant Steel Plate

Abrasion resistant (AR) steel plates are high-carbon alloy steel plates. The added carbon during formation makes the steel harder, while added alloys enhance formability and weather resistance.

The carbon increases the toughness and hardness of the steel but decreases its strength. Consequently, AR plates are ideal for applications where abrasions and wear are prevalent, including industrial manufacturing, mining, construction, and material handling. These plates are not suitable for structural construction purposes, such as support beams in bridges or buildings.

Common uses of AR steel include:

• Conveyors
• Buckets
• Dump liners
• Construction attachments (e.g., for bulldozers and excavators)
• Grates
• Chutes
• Hoppers

Production Process: Quenching and Tempering

AR steel is produced by quenching and tempering forged steel blocks or ingots. This process changes the grain structure, making the material tougher and more formable.

Quenching and tempering (Q&T) is a two-step process:

Quenching: The steel is heated to high temperatures (1,500-1,650°F) and then rapidly cooled with water, forming crystal structures that enhance hardness.

Tempering: Quenched steel is reheated to below-critical temperatures (300-700°F) and allowed to cool naturally, breaking and reforming crystal structures to maintain strength and hardness while increasing ductility.

The Significance of 'F'

Abrasion resistant steel often bears designations like "AR400F" or "AR450F". Historically, the "F" indicated "formable" steel that could be bent without cracking, which was slightly more expensive than non-formable steel. Nowadays, AR steel, with or without the "F", is generally formable, and price differences have diminished.

Understanding Through-Hardening

When AR steel is described as through-hardened, it means that the entire plate undergoes a change in composition during Q&T. This contrasts with case-hardening (surface-hardening), which affects only the surface, leaving the inner metal softer.

Comparing AR400, AR450, and AR500+

Unlike other steels, AR steels aren't governed by an ASTM code or specific chemistry; they are categorized by hardness levels, determined by the Brinell Hardness Number (BHN).

BHN values typically are as follows:

AR400: 360-440 BHN
AR450: 430-480 BHN
AR500: 460-544 BHN
AR600: 570-625 BHN (less common but available)

Choosing the Right Hardness

High-stress applications, such as mining equipment, often require higher BHN grades (AR500, AR600) for maximum wear resistance. Conversely, construction equipment may need lower BHN grades (AR400, AR450), which offer a balance of hardness and formability.

Formability vs. Machinability

AR materials often need to balance hardness and brittleness. Higher hardness increases brittleness, making shaping and welding challenging. AR400 and AR450 offer a middle ground, providing good hardness with relative formability and machinability.

For extremely abrasive applications, AR500 and AR600 provide longevity but are harder to form and machine.

Material Costs

AR steel grades generally cost more than HSLA or mild carbon grades. However, their durability and wear resistance can result in long-term cost savings. Costs also vary with BHN levels, order sizes, and market conditions.

AR Medium Steel

AR Medium steel, such as AR200 and AR235, offers surface hardness of 180-260 BHN, making them suitable for moderate-wear applications. These grades offer more wear resistance than mild carbon steel but less than high-end AR grades.

Acquiring Abrasion Resistant Steel Plate

Selecting the appropriate AR steel grade involves considering several factors, including hardness, wear resistance, and ductility. Ultimately, cost considerations also play a role.

Once you determine the suitable material, Leeco Steel's expert team can help source it for you. We specialize in selling large quantities of steel plates, so feel free to contact us, request a quote, or learn more today.

For more on Welding Manipulator, reach out to us.

Current customers can also buy AR500 steel plates online via Leeco Pro, our ecommerce platform that simplifies ordering.

High Manganese Steel Plate Details

Introduction

High-manganese wear-resistant steel is an optimal choice for strong impact and high-pressure material wear. It features unmatched work hardening properties, rapidly increasing surface hardness from HB200 to HB500 under impact, while maintaining inner toughness.

Specifications

• Item: High Manganese Steel Plates
• Thickness: 35mm-150mm
• Length: 3000mm-18000mm
• Width: 1000mm-4500mm
• Supply Condition: Various conditions including As Rolled, Normalized Rolling, and others.
• Impact tested: -52°C
• Manufacturing Process: Hot-Rolled (HR)

Chemical Composition

High-manganese wear-resistant steel has a high carbon content (wC=0.9%-1.45%, wMn=11%-14%). It is prone to deformation by cold processes, therefore, parts are usually cast. Rolled steel plates with Mn13 offer higher performance than cast versions.

Performance Characteristics

• Higher external impact leads to higher wear resistance on the surface.
• The hardening layer forms continuously as it wears out.

Advantages

• Resistant to high abrasion and severe impact.
• Rapid work hardening up to 550BHN.
• Maintains ductility throughout its lifespan.
• Weldable and non-magnetic properties.
• Can be cut using various methods such as oxy-acetylene torch, plasma, water jet, or laser.
• Manufactured to stringent standards for extended service life.

Applications

Widely used in shot blasting machines, ball mills, pulverizers, and parts subject to strong impact. It is prevalent in industries such as shipbuilding, automotive, machinery, power generation, cement, and mining.

Our History

Founded in 1998, Runfei Steel Group has grown into a significant enterprise in Tianjin, the economic hub and major port in north China. We offer convenient transportation, a robust marketing network, and powerful storage, processing, and distribution systems.

FAQ

Q1. What kind of terms of payment?
A: T/T, L/C are available.

Q2. What grades of the product can you offer?
A: These products can be customized according to your requirement.

Q3. Is a free sample available?
A: Yes, a free sample is available.

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