The series are designed for high abrasion performance. The anti-wear property is four times as much as that of high manganese steel and twice of low alloy steel.HRC52-65, AK5-15J.
The materials conform to GB/T 8263-1999, BS 4844 3E, AS 2027 CrMo 15/3, AS 2027 CrMo 20/2/1, AS 2027 Cr27, ASTM A532  Class III type A 25% Cr, ASTM A532 Class II type B 15% Cr-Mo.