AR400 and AR500 steel are two of the most used wear-resistant steels in industries like mining, construction, and shooting sports. Known for their hardness and strength, these steels are built to last under pressure and rough use. AR500 steel is harder and better for high-impact tasks, while AR400 gives a balance between strength and flexibility, making the choice between AR400 vs. AR500 important depending on your needs.
Choosing the right one depends on what you need, more toughness or more durability. In this article, we explain the differences between AR400 steel and AR500 steel, their uses, advantages, and how to pick the best one for your specific job.
What is AR500 Steel?
AR500 steel is a high-hardness, abrasion-resistant steel engineered for extreme wear and heavy-duty applications. With a Brinell hardness of approximately 470–540 BHN, AR500 offers superior wear resistance compared to AR400. It is a heat-treated alloy steel known for its durability under high-impact conditions, making it ideal for shooting targets, armor plating, industrial wear parts, and heavy machinery components. While extremely hard, AR500 has slightly lower impact resistance than AR400, so proper support is recommended in applications involving heavy shocks.
What is AR400 Steel?
AR400 steel is a medium-hard abrasion-resistant steel designed to handle heavy wear while maintaining high impact resistance. The “AR” stands for “Abrasion Resistant,” and the number “400” refers to its Brinell hardness (around 360–440 BHN). AR400 is made from high-carbon alloy steel, giving it excellent strength, durability, and toughness. It is widely used in mining equipment, dump truck beds, chutes, hoppers, and other industrial applications where moderate wear resistance and impact performance are required.
What Are AR500 and AR400 Steel Made Of?
AR500 and AR400 steel are made from a mix of iron, carbon, and alloying elements that improve hardness, strength, and resistance to wear. The main ingredient is iron, but carbon is added to make the steel stronger and harder. A higher carbon content increases hardness but reduces flexibility, which is why AR500 is more complex and more brittle than AR400.
Main Alloying Elements
To improve performance, elements like manganese, chromium, nickel, and molybdenum are also added in small amounts. These alloys help the steel resist impact, heat, and corrosion. The mix of these elements is carefully controlled during the steel-making process to reach the desired hardness level.
Both AR500 steel and AR400 steel are quenched and tempered, meaning they are heated to a high temperature and then cooled quickly to lock in strength. After that, they are reheated to a lower temperature to reduce brittleness. This process gives the steel its final balance of toughness and stamina.
AR400 Vs AR500: Basic Comparison Table
Property | AR400 Steel | AR500 Steel |
Full Name | Abrasion Resistant 400 Steel | Abrasion Resistant 500 Steel |
Brinell Hardness | Around 360-440 BHN | Around 460-544 BHN |
Tensile Strength | Approx. 150,000 psi | Approx. 200,000 psi |
Toughness | More flexible | Harder but less flexible |
Weldability | Easier to weld with standard methods | Can be welded, but needs preheating and care |
Machinability | Easier to cut, drill, and machine | Harder to machine due to higher hardness |
Uses | Light-duty wear parts, construction, and liners | Shooting targets, heavy equipment, and ballistic plates |
Cost | Lower than AR500 steel | Higher than AR400 |
Heat Treatment | Quenched and tempered | Quenched and tempered |
Durability in Harsh Use | Good, but wears faster under high impact | Excellent, lasts longer under extreme conditions |
Best For | Applications that need both strength and flexibility | Applications needing extreme hardness and wear-resistance |
Impact resistance of AR400 vs. AR500 steel
AR400 and AR500 are both abrasion-resistant steels, but they differ significantly in impact resistance. AR400 has a Brinell hardness of around 360–440 HBW and offers higher toughness, allowing it to absorb shocks and impacts without cracking. This makes it well-suited for applications such as mining equipment, hoppers, and chutes, where moderate wear resistance and good impact performance are required.
In contrast, AR500 is much harder, with a Brinell hardness of approximately 470–540 HBW, providing superior wear resistance. However, this increased hardness comes at the expense of impact toughness, making AR500 more brittle and susceptible to cracking under sudden heavy loads or sharp impacts. It is typically used in extreme wear environments, such as ballistic plates or heavy-duty mining wear parts, where abrasion resistance is the primary concern.
What Is AR500 Steel Used For?
AR500 steel is used in industries and activities where materials face repeated impact or abrasion. It is popular for making steel shooting targets, ballistic plates, and protective panels because of its high hardness and resistance to damage.
This abrasion-resistant steel 500 is used in mining trucks, excavator buckets, conveyor systems, and chutes, where parts are exposed to harsh materials and rough handling. Its durability also makes it suitable for military armor and security applications, such as vehicle plating and riot control shields. AR500 performs well in harsh environments where long-lasting protection is needed.
What Is AR400 Steel Used For?
AR400 steel is used in projects where strong wear resistance is needed, but some flexibility is also important. It is commonly used in construction equipment, dump truck beds, bulldozer blades, and gravel screens, where materials constantly rub or strike the surface. AR400 is also found in agricultural tools, conveyor parts, and light mining equipment.
AR400 can also be shielded and welded more easily, which makes it a great choice for industries that need trustworthy protection and easier fabrication.
Weldability and Fabrication Differences
When comparing AR400 and AR500 steel, their difference in weldability and fabrication are very important to understand. These factors affect how the steel is installed and also its long-term performance.
Welding Process
AR400 is easier to weld using standard methods like MIG, TIG, or stick welding. It usually does not require preheating unless the plate is thick, which makes it more convenient for fieldwork or general fabrication.
However, AR500’s higher hardness makes it more challenging to weld. Pre-heating to around 275-400℉ is required to reduce the risk of cracking. It is also important to use low-hydrogen filler materials and allow the steel to cool slowly after welding.
Fabrication Process
Fabrication means turning steel plates into useful parts by cutting, shaping, welding, or bending them. It is an important step in making equipment or structures, and how easy it is to work with the steel depends on its hardness and flexibility.
AR400 is easier to work with during fabrication. It can be cut using normal tools like saws or torches. Drilling holes and making shapes is simpler, and it can also be bent without much risk of cracking. This makes AR400 a good choice for projects where the steel needs to be changed or shaped often.
AR500 is much harder, so it is more difficult to cut and shape. Normal tools may not work well, and they often need plasma, laser, or water jet cutting. Drilling and bending are also harder. If you try to bend it without heating, it might crack. Welding AR500 also needs more care, like preheating and using special welding materials.
AR400 and AR500 in Different Environments
The way AR400 steel and AR500 steel perform can be different based on the environment they are used in. Each type of steel has strengths that make it better for certain conditions. Once you understand how both work in different environments, making a decision on which to choose will become easier.
Performance in Cold Weather
AR400 is less brittle in freezing temperatures, making it a better choice for cold climates. It can handle shock and impact without cracking. AR500, due to its higher hardness, is more likely to crack if exposed to extreme cold without proper support or thickness.
Performance in Hot and Dry Areas
In hot or dry environments, both steels perform well. But AR500 is more suitable when equipment faces high abrasion or impact, such as in mining or heavy-duty machinery. Its surface resists scratches and dents better than AR400.
Moist or Wet Conditions
Both steels can rust if not coated, but AR400 is easier to paint or treat due to its slightly softer surface. In wet or humid conditions, AR400 is easier to maintain and repair if needed.
Best Environment for Each Steel
Use AR400 in construction sites, farms, or equipment exposed to regular impact and changing weather. Use AR500 in shooting ranges, military armor, and mining, where the steel must handle constant, hard hits.
Which Should You Choose?
Choosing between AR400 and AR500 depends on how the steel will be used, the level of impact, and how easy it needs to be to cut or weld. Both steels are excellent for wear resistance, but they serve different purposes based on their hardness and flexibility.
Choose AR400 Steel if You Need Easy Fabrication
AR400 is better for jobs that require cutting, drilling, welding, or bending. It is more flexible and easier to shape, which makes it perfect for construction equipment, farm tools, liners, and medium-duty machinery. It also handles cold weather and impact better, which is useful in outdoor environments.
Choose AR500 If You Need Maximum Wear Resistance
If your project needs steel that can withstand constant impact, friction, or shooting, AR500 is a better option. It is best for shooting targets, military armor, mining equipment, and any task where the surface takes a lot of abuse. However, it is harder to cut and weld and usually needs special tools and preheating.
Consider Your Budget and Tools
AR400 is more affordable and easier to work with, so it fits well in smaller or low-impact projects. AR500 is more expensive, but it lasts longer in tough conditions. While AR400 helps reduce fabrication costs due to easier cutting and welding, AR500 may save money over time by reducing the need for frequent repairs or replacements.
Cost Vs Performance: Is AR500 Worth It?
AR500 steel is more expensive than AR400, mainly because of its higher hardness and greater resistance to wear and impact. It also requires special handling during fabrication, such as preheating before welding and using advanced cutting tools, which adds to the total cost. The real question is whether this higher cost is justified by the performance it offers.
When Does AR500 Pay Off?
In extreme-use environments like shooting ranges, mining operations, and ballistic protection, AR500 proves its value by lasting much longer than softer steels. It can handle repeated high-impact forces and heavy abrasion without wearing out quickly.
This means fewer replacements and lower long-term maintenance costs. In such cases, the higher initial cost is balanced out by longer service life and reliability.
On the other hand, for moderate tasks such as farm equipment, dump beds, or construction machinery, AR400 performs well at a lower price. It is easier to cut, weld, and shape, which also reduces labor and tool costs. For many general applications, AR400 is better in terms of both cost and performance.
So, AR500 is worth the investment only when extreme durability is required. For most standard uses, AR400 remains the more practical and budget-friendly choice.
Common Grades and Equivalent Standards
AR400 and AR500 are not single-brand products but general names used to describe steel plates with specific hardness levels. Different manufacturers and countries produce similar wear-resistant steels under various names and standards. This makes it important to understand equivalent grades, especially when comparing materials for global projects.
Global Equivalents of AR400 and AR500
For AR400, there are some common global equivalents, including Hardox 400 (Sweden), RAEX 400 (Finland), Bisplate 400 (Australia), JFE EH400 (Japan), and NM400 (China).
For AR500, the equivalents are Hardox 500, RAEX 500, Bisplate 500, JFE EH500, and NM500.
Standard and Classification System
In Europe, AR steels are classified under EN 10051 and EN 10163 standards. Japan uses JIS standards, while Australia follows its own system for Bisalloy steels. Though the names and certifications are different, the performance is similar.
Technical FAQs
Can you weld AR500 with a MIG welder?
Yes, you can weld AR500 with a MIG welder, but it will need special care. Use a low-hydrogen wire and preheat the steel to avoid cracking. After welding, let it cool slowly. This will help keep the steel strong and avoid any damage.
How thick should AR500 be for shooting targets?
For handguns, 3/8 inch (about 9.5 mm) AR500 is enough. For rifles, 1/2 inch (12.7 mm) or thicker is safer. Thicker plates last longer and resist dents or cracking better. Also, keep a safe shooting distance to protect both the target and the shooter.
Can AR400 replace AR500 in light-duty wear applications?
Yes, AR400 can replace AR500 if the wear is not too heavy. AR400 is still tough and cheaper. It works well for things like dump truck liners or farm equipment. However, it may wear out faster than AR500 if used in high-impact or abrasive environments.
Does AR500 shatter under stress?
AR500 is very hard, but that also makes it less flexible. If hit with very strong force at the wrong angle or if it is too thin, it can crack or chip. That’s why correct thickness and mounting are important.
Conclusion
AR400 and AR500 are both strong and wear-resistant, but each is better for different jobs. AR400 is easier to work with, while AR500 lasts longer in tough conditions. If you need good-quality steel for your project, ZhaojianSteel offers both AR400 and AR500. Reach out to ZhaojianSteel to find the best steel for your needs.
