What is the AR steel

Abrasion resistant (AR) steel plate is a high-carbon alloy steel plate. This means that AR is harder due to the addition of carbon, and formable and weather resistant due to added alloys.
 
AR steel properties
Carbon added during the formation of the steel plate substantially increases toughness and hardness, but reduces strength. Therefore, AR plate is used in applications where abrasions and wear and tear are the main causes of failure, such as industrial manufacturing, mining, construction and material handling. AR plate is not ideal for structural construction uses like support beams in bridges or buildings.
Common grades: NM300, NM360, NM400, NM450, NM500, NM550, NM600,
Common uses for AR plate include conveyors, buckets, dump liners, construction attachments and grates.
 
How The Quenched & Tempered Process Creates AR Plate
AR material is produced by quenching and tempering forged steel blocks, or ingots. During this process, the grain structure is changed to increase toughness and encourage formability (or, to be less brittle), and results in through-hardening of the material.
 
Quenching and tempering (Q&T) is a two-part process:
Quenching occurs when steel brought to a high temperature-usually between 1,500-1,650-degrees Fahrenheit – is rapidly cooled with water. This process causes crystal structures to form within the steel, increasing hardness.
Tempering is the process of re-heating quenched steel to a below-critical temperature (around 300-700-degrees Fahrenheit), and then allowing the plate to cool in normal air temperatures.
 
Reheating the Abrasion resistant steel material breaks down the crystal structures formed during the quenching process, while the long cooling allows the crystal structures to reform-maintaining most of the strength and hardness, but adding to overall ductility.