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Grade AR400 0.5 in. x 120 in. x 480 in. steel plate front view.
Grade AR400 0.5 in. x 120 in. x 480 in. steel plate right view.
Grade AR400 0.5 in. x 120 in. x 480 in. steel plate top view.

AR400 / 400F Abrasion Resistant Steel Plate

AR400 is an abrasion resistant steel plate that combines surface hardness with formability for moderate-to-heavy wear applications. Leeco® Steel stocks and supplies large quantities of AR400 steel plate.
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Features

  • Surface hardness of 360-440 BHN.

  • Also referred to as AR400F (formable).

  • Composition and hardening processes differ between mills. Mill test reports will be supplied with each order.

  • Available to purchase online via Leeco® Pro. Click here to log on or contact us to learn more.

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Product Details

Grade Thickness Width Length
AR400 3/16" – 4" 48" – 120" Up to 480"

Grade Comparison

Frequently Asked Questions

Learn more about AR400 steel plate.
Abrasion-resistant steel plate is primarily selected by hardness and wear performance, not by one fixed chemical formula. Because of that, chemistry and hardening processes can vary by mill as long as the plate meets the required hardness range and performance expectations for the grade. Mill test reports or hardness reports are supplied with orders to verify the material’s properties and confirm it meets the specified AR grade.
AR400, AR450, AR500 and AR600 are abrasion-resistant steel plate grades that generally increase in hardness as the grade number rises. AR400 balances wear resistance and formability, AR450 provides more surface hardness than AR400, AR500 is used for more severe wear and impact applications, and AR600 is typically selected for the most excessive wear applications where maximum hardness is the priority. As hardness increases, formability generally decreases. Learn more about abrasion-resistant steel and how AR grades differ.
AR Medium plate is designed for moderate wear applications and includes grades such as AR200 and AR235. AR400 is a harder abrasion-resistant plate used for more demanding wear applications. The main difference is hardness: AR Medium sits in a lower hardness range, while AR400 is used when greater abrasion resistance is required.
The “F” in AR400F and AR450F historically stood for “formable,” meaning the abrasion-resistant steel plate could be bent to a certain degree without cracking. Today, AR steel plate with or without the “F” designation is often considered interchangeable because most mills now produce formable AR plate as the standard.
AR400 steel plate is a popular abrasion-resistant steel grade that combines through-hardness with good ductility and formability. It typically has a surface hardness range of 360–440 BHN and is used in moderate-to-heavy wear applications such as bucket components, dump body trucks and construction equipment. AR400 is also referred to as AR400F when formability is emphasized.