Crane Outrigger Pad HDPE Abrasion Resistant Plate. Steel grade: NM360 NM400 NM450 NM500 NM550 NM600 Thickness: 5-140mm Width: 1500-3500mm custom cut-to-size Length: Can be customized Brinell hardness: 550 Production standard: GB/T24186-2009 Brand: Chinese brand Heat treatment: tempering (Quenching + Bacit)