What is abrasion-resistant steel (AR-steel)

Carbon is a key alloy for increasing the hardness of abrasion-resistant steels ' but too much carbon reduces its tensile strength and toughness, making it brittle and vulnerable to cracking. Additional AR steel alloys include manganese, chrome, nickel, and boron in different proportions based on specific end-use goals of the wear-resistant grade.

Wear-resistant steels can be made a few different ways, including furnace-heating followed by quenching, or rolling followed by direct quenching. Quenching alters the steel's molecular structure, increasing its hardness.

As hardness increases in traditional AR steels, their formability and weldability decrease, limiting their applications. But the toughness of Raex abrasion-resistant steels lets fabricators bend, form, and weld without losing its properties, making it suitable for more challenging applications.

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Abrasion-resistant steel, or AR steel, is mainly used for applications where abrasion and wear are the causes of failure, and not in infrastructure like buildings or bridges. Typical uses include buckets and other heavy equipment attachments, dump and trailer bodies, concrete mixers, garbage trucks, wear liners and wear parts, such as cutting edges.

AR steel plate is made from steel slabs containing different alloys. Of these alloys, carbon plays a key role in making wear plate abrasion-resistant, because it increases the steel's hardness. When the carbon increases, the hardness increases, but the toughness is reduced making it more susceptible to cracking. 

That's why good steelmaking processes are vital. You need just the right recipe that balances alloying, heat treatment and chemistry to get the properties you want. At SSAB, we believe we have perfected our recipe for steels that provide maximum toughness and strength yet do not usually require preheating for excellent welding and cutting results.

If you want to learn more, please visit our website ar400 steel chemical composition.