Low-alloy steel plate quenched to a high, uniform hardness — typically 400, 450 or 500 HBW — so that it resists sliding and impact abrasion from rock, sand, ore and scrap. It lines dumper bodies, buckets, chutes, hoppers and crusher parts, and lasts several times as long as structural steel in the same place.
Also called
Abrasion resistant plate
AR plate
AR400
AR450
AR500
NM400
NM450
NM500
Wear plate
Quenched and tempered wear plate
Chromium carbide overlay plate
AR
صلب مقاوم للتآكل والاحتكاك
ZH
耐磨钢板
DE
Verschleißfester Stahl
FR
Acier anti-abrasion
ES
Acero antidesgaste
IT
Acciaio antiusura
TR
Aşınmaya dayanıklı çelik
RU
Износостойкая сталь
Main formsQuenched plates, cut-to-size parts, bent liners, overlay (hardfaced) composite plates
Typical sizesThickness 3–100 mm (up to 150 mm in lower hardness); plates up to about 3,000 × 12,000 mm
Main standardsHardness to ISO 6506-1 / ASTM E10; tolerances EN 10029; GB/T 24186 (NM grades)
Typical usesDumper and tipper bodies, excavator buckets, chutes, hoppers, crusher liners, cement and mining plant
Overview
Abrasion resistant steel gets its hardness from a martensitic structure produced by quenching the plate straight after rolling or after reheating, in a plate quench line, with carbon around 0.15–0.35% and small additions of chromium, molybdenum, nickel and boron for hardenability. Hardness is the property that sells it: the grades are named by their nominal Brinell hardness — 400, 450, 500 HBW — and wear life rises steeply with it, while toughness, bendability and weldability fall.
There is no European or American product standard that names these grades. Each producer sells its own family under its own brand, with a nominal hardness and guaranteed ranges, and buyers compare them on hardness, through-thickness hardness, impact toughness and bend radius. In China the grades are standardised as NM360 to NM600 in GB/T 24186; in the trade the generic terms AR400, AR450 and AR500 are common. Plate tolerances follow the general plate standards such as EN 10029.
Wear plate is cut by plasma, laser or oxy-fuel and can be bent and welded with care: preheat for thicker plates, low-hydrogen consumables, and cutting speeds that do not soften the edge. It must not be heated above about 200–250 °C in service or fabrication, or it tempers and loses its hardness. Where wear is more severe, chromium-carbide overlay plates — a hardfaced layer welded onto a mild-steel backing — are used instead.
In the Middle East the users are quarries and crushers, cement plants, mining (phosphate, bauxite and gold in Saudi Arabia, and iron ore handling at pellet and DRI plants), dredging, the trailer and dumper-body builders, and steel plants' own scrap and slag handling. All of it is imported, mostly from European, Japanese, Korean and Chinese mills, and cut to parts by local service centres.
Forms & sizes
Plates
3–100 mm and more; 400 HBW is rolled thickest, 500 HBW and above in thinner gauges
Cut parts
Profile-cut liners, cutting edges and bucket parts from plate, often bevelled for welding
Bent and formed parts
Dumper floors and sides, bent with radii the producer's datasheet allows
Overlay plate
Chromium carbide hardfacing on a mild-steel backing, e.g. 6+4 or 8+6 mm, for sliding wear
Hardness tolerance
Typically about ±30–50 HBW around the nominal grade
Standards & grades
Wear plate grades are producers' own; the standards below cover how hardness is tested and how the plate is toleranced.
Steel Mills - Agents & Traders · Stockist - Distributor · Base Materials · Dubai
