Standard:DIN172000

Materials: 50CrMo4

Technical: cold-draw seamless

Delivery Condition:BK.BKW,BK+S,GBK,NBK

Straightness: 0.5mm/1m max for tubes below 3m,0.8mm/1m max for tubes between 3 to 6m, 1.2mm/1m for tubes above 6m

Technology:honed & SRB(Skived and Roller Burnished).

Application: used in the hydraulic cylinder of the Heavy Machinery, Cranes, Excavator and Forklifts.etc