AR400 vs AR500: Understanding the Difference

When it involves figuring out the right type of steel to meet the needs of your project, it may take time to determine between ar400 and ar500. Both are alloys with excessive strength and wear resistance. However they differ as each steel has unique properties that make it a better fit for specific applications. The ar400 vs ar500 key differences will help you make the right decision.

What are AR400 and AR500?

AR400 and AR500 are types of abrasion-resistant steel. These alloys are used in different applications in which there’s a need for excessive strength, durability, and resistance to wear and tear. 

The AR stands for abrasion-resistant, while the numbers after it indicate the steel’s hardness in the Brinell scale. AR400 has a hardness of four hundred BHN, while AR500 has a hardness of 500 BHN. 

AR400 and AR500 are famous alternatives for manufacturing heavy equipment and machinery, making body armor, and shooting targets. Despite their similarities, a few key differences between the AR400 and AR500 might be well worth exploring.

Comparison of AR400 vs AR500 Steel Properties

AR400 and AR500 are both abrasion-resistant steel materials used in a wide range of applications. 

Brinell Hardness:

AR400 has a Brinell hardness variety of 360-440 and is understood for its superior strength, sturdiness, and abrasion resistance. It’s more often than not used in applications such as mining, construction, and production, where heavy wear and tear are common. 

AR500, however, has a Brinell hardness variety of 477-534 and is thought of for its remarkable effect resistance and sturdiness. It’s generally used in applications including armor plating and target shooting. 

Hardness Rating:

One of the important variations between AR400 and AR500 is their hardness. AR500 has a higher hardness rating than AR400, making it more resistant to impacts and different types of damage. However, the AR400 is known for its superior durability and can resist heavy wear and tear higher than the AR500. Ultimately, the choice between AR400 vs. AR500 comes all the way down to the particular needs of your application. 

If you’re searching for a material that can withstand heavy abrasion, AR400 is the right option. But if you want a material that can manage excessive-velocity impacts, AR500 may be a better option.

Abrasion Resistance

AR400 is right for applications requiring medium to high abrasion resistance levels. It is best utilized in mining, construction, and manufacturing industries, where heavy equipment and machinery can cause massive wear and tear on the materials.

AR500, on the other hand, is best suited for applications requiring excessive abrasion resistance tiers. This makes it popular in the military and law enforcement industries, in which it’s used for body armor and target plates.

Impact Resistance

AR400 is known for its high impact resistance. It makes it a popular choice for applications where materials need to withstand heavy blows and impacts. It includes industries like forestry, agriculture, and transportation.

AR500, while still offering good impact resistance. It is best to go for applications where high-velocity impacts are a concern. This includes ballistic armor and targets for firearms training.

Easy to Machine

AR400 is easier to machine than AR500. AR400 is a better choice for applications that require complex shapes and designs. This includes components for heavy equipment, machinery, tools, and fixtures.

AR500, while more difficult to machine, is still suitable for some applications that require machining. However, it’s often used in simpler designs and shapes.


AR400 is generally less expensive than AR500. This makes it a more cost-effective choice for many applications. However, it’s important to consider the specific needs of your project and choose the material that will provide the best performance and longevity.

In summary, the choice between AR400 and AR500 steel plates will depend on the specific needs of your application. Consider factors such as abrasion resistance, impact resistance, machinability, and cost to determine the best material for your project.

Which One Should You Choose?

Deciding between an AR400 and an AR500 can be tough, but it ultimately depends on your specific needs and requirements. AR400 is ideal for applications that require moderate wear resistance and toughness, whereas AR500 is perfect for heavy-duty applications that involve extreme wear and tear. 

If you’re looking for a material that can withstand heavy impact, abrasion, and deformation, then ar500 is your best fit. However, remember that ar500 is much harder and more expensive to work with than ar400. If you’re working with lighter equipment and machinery or need moderate wear resistance, the AR400 is likely the better option.

In terms of price, ar400 is generally cheaper than ar500, which may make it a more cost-effective solution for some applications. It’s also easier to machine, weld, and cut, making it more versatile for various projects.

Ultimately, the choice between ar400 vs. ar500 comes down to your application’s specific needs and requirements. If you need high wear resistance, toughness, and durability, AR500 is the way to go. But if you’re working with lighter equipment and need a more affordable, versatile solution, the AR400 is likely your best choice.


In conclusion, it is essential to understand the variations between AR400 VS AR500 before you decide which one to use for your unique application. While both materials offer high strength and durability, AR400 is a more versatile choice for applications that require lower levels of abrasion resistance, whereas AR500 is better suited for extreme abrasion resistance and ballistic protection. 

When choosing between the two, it’s important to consider factors such as the level of abrasion resistance required, the type of equipment being used, and the specific conditions to which the material will be subjected. By selecting the appropriate material for your needs, you can ensure that your equipment will be able to withstand the challenges it will face.

Ultimately, whether you choose AR400 vs AR500 will depend on the unique requirements of your application. However, by understanding the differences between these two materials, you can make an informed decision and choose the best option for your needs.