AR550 steel plate is primarily engineered for ballistic protection and industrial wear resistance, with clearly defined, industry-certified capabilities.Ballistic Protection (NIJ III+/RF2 Rating): It can stop 7.62×51mm M80 ball ammunition, 5.56×45mm M855 green tip/SS109 rounds, 7.62×39mm MSC ammunition and 5.56×45mm XM193 rounds. It is capable of withstanding rifle bullets with a velocity ≤ 3100fps, while also defending against all types of pistol ammunition.Industrial Wear Resistance: With a Brinell Hardness ≥ 550HB, it can prevent scouring, abrasion and impact damage caused by ores, gravel and other materials, avoiding component failure due to wear. It is suitable for high-wear parts in mining, construction and engineering machinery, extending service life of components.Impact Resistance & Deformation Prevention: Balancing toughness and hardness, it can prevent fracture or cracking caused by instantaneous impact under heavy-duty conditions, and resists deformation during long-term use, ensuring stable equipment operation.

AR550 Steel Plate

TongHui is one of the leading AR550 steel plates manufacturers and suppliers in China, located in Liaocheng, Shandong Province.
AR550 steel plate, as a benchmark product for high-strength wear-resistant steel, boasts a Brinell hardness of 550HB, combining excellent impact resistance and formability. It is widely used in heavy-duty applications such as mining machinery, construction machinery, and wear-resistant liners, significantly extending equipment service life. We offer a full range of specifications and customized services, with quality that meets high industry standards. Welcome to inquire!

What is AR550 Steel Plate

AR550 steel plate is a high-strength wear-resistant alloy steel plate with a core characteristic of Brinell Hardness ≥ 550HB. Achieved through a special alloy composition (containing manganese, chromium, molybdenum and other elements) and heat treatment process, it boasts excellent wear resistance, impact resistance and machinability. Complying with high industry standards, it is suitable for heavy-duty wear-resistant applications such as mining machinery, construction machinery, wear-resistant liners, chutes and crushers. It can effectively resist material erosion and impact, significantly extend equipment service life and reduce maintenance costs, making it the preferred steel for wear-resistant needs in the industrial sector.

AR550 Steel Plate Price

The current wholesale price of AR550 wear-resistant steel plate is approximately 580-650 USD/ton, while the retail cutting price varies by specification and quantity. The conventional thickness ranges from 0.375-2 inches (9.5-50.8mm), with standard sheet sizes mostly at 48×96 inches or 60×120 inches. Price is influenced by thickness: plates below 1 inch cost around 0.65-0.75 USD/square inch, and those above 1 inch reach 0.80-0.95 USD/square inch. Additionally, custom cutting, special surface treatment, order volume, and transportation distance will affect the final quotation. Bulk purchases (≥10 tons) can enjoy a 5%-8% discount.

Get your exclusive customized AR550 steel plate solution！

AR550 Steel Plate Properties

Excellent Impact Resistance:

While maintaining high hardness, it also offers good toughness with an impact energy (Akv) ≥ 27J. It can withstand instantaneous impact loads in heavy-duty scenarios, avoiding fracture or cracking and ensuring stable equipment operation.

Superior Wear Resistance

With a Brinell Hardness ≥ 550HB, it features an optimized alloy ratio (including manganese, chromium, molybdenum, etc.) and quenching + tempering process. Boasting uniform surface hardness, it can effectively resist material scouring, abrasion and impact, with wear resistance far exceeding that of ordinary carbon steel, making it suitable for high-wear working conditions.

Good Machinability

It supports conventional processing methods such as flame cutting, plasma cutting, bending and welding. During processing, it is not prone to cracking, and can meet the requirements of customized sizes and special-shaped structures, adapting to various equipment assembly scenarios.

Stable Structural Reliability

Adopting high-quality base plates and precision heat treatment processes, it has a uniform and dense internal structure without defects like porosity and inclusions. With high dimensional accuracy (thickness tolerance ≤ ±0.05 inches), it is not easy to deform during long-term use, and its service life is extended by more than 30% compared with ordinary wear-resistant steel.

AR550 Steel Plate Application Field

Our AR550 steel plate is applied in various fields！

Mining Machinery

Crusher

Machinery Manufacturing

Frequently Asked Questions

What is AR550 steel rated for?

AR550 steel is rated primarily for high-wear, heavy-duty industrial applications and ballistic protection, with defined performance benchmarks. It has a rated Brinell Hardness of 530-570 HB , engineered to resist sliding abrasion and impact, making it ideal for mining/construction machinery components like liners, chutes, and crusher parts .

For ballistic use, it meets NIJ 0101.06 Level III standards and is rated III+ for special threats , capable of stopping 7.62x51mm M80 ball and 5.56mm M855 green tip rounds . It also boasts rated impact strength (≥14 ft-lbs at -40°F) and good formability, supporting welding and cutting .

This dual-rating makes it a reliable choice for extending equipment service life in harsh industrial environments and providing rifle-rated protection for law enforcement and military use .

What can AR550 stop?

AR550 steel plate is primarily engineered for ballistic protection and industrial wear resistance, with clearly defined, industry-certified capabilities.

Ballistic Protection (NIJ III+/RF2 Rating): It can stop 7.62×51mm M80 ball ammunition, 5.56×45mm M855 green tip/SS109 rounds, 7.62×39mm MSC ammunition and 5.56×45mm XM193 rounds. It is capable of withstanding rifle bullets with a velocity ≤ 3100fps, while also defending against all types of pistol ammunition.
Industrial Wear Resistance: With a Brinell Hardness ≥ 550HB, it can prevent scouring, abrasion and impact damage caused by ores, gravel and other materials, avoiding component failure due to wear. It is suitable for high-wear parts in mining, construction and engineering machinery, extending service life of components.
Impact Resistance & Deformation Prevention: Balancing toughness and hardness, it can prevent fracture or cracking caused by instantaneous impact under heavy-duty conditions, and resists deformation during long-term use, ensuring stable equipment operation.

What rating is AR550 body armor?

The core protection level of AR550 body armor is officially certified as NIJ 0101.06 Level III, while it also holds the industry-recognized Level III+ (RF2) special threat rating for high-risk scenarios. Details are as follows:

NIJ 0101.06 Level III Certification: It passes official standard tests and can withstand 7.62×51mm M80 ball ammunition, 5.56×45mm M193 rounds, 7.62×39mm ammunition and all types of pistol ammunition, meeting basic rifle protection needs.
Industry Level III+ (RF2) Rating: Verified by independent laboratory special threat tests, it can additionally stop high-velocity armor-piercing rifle rounds such as 5.56×45mm M855/SS109 green tip ammunition and XM193 (velocity ≤ 3100fps), filling the protection gap between Level III and Level IV.
Labeling Note: Since there is no official Level III+ rating in NIJ standards, AR550 armor plates are often labeled as Level III, with their III+ rating serving as an industry supplementary grade. Attention should be paid to the product’s special threat test report.