Mainly used in:

a.Honed / skived tubes used on hydraulic cylinders

b.Honed / skived tubes used on pneumatic cylinders

c.Honed / skived tubes used on piston accumulators

Usual standard of cylinder tubes and honed tubes：

American standard: ASTM A519-2006, ASTM A513-2007, ASME SA372/SA

Common Steel Grade: SAE1020, SAE1026, SAE1045, SAE4130, SAE4140

European standard: EN10305-1, EN10305-2

Common Steel Grade: E355, C45E, 34CrMo4, 42CrMo4

Germany standard: DIN2391-2

Common Steel Grade: ST52, ST52.3, ST52.4

Chinese Standard: GB3639-2009, GB/T8713, GB/T1591-2008, GB/T17396-2009

Common Steel Grade: 20#, 45#, 16Mn, 25Mn, 27SiMn, Q345, Q235, 30CrMo, 40CrMo

Standard size range:

ID tolerance: H8 - H9            Straightness: 0.2 – 0.5 (mm/m)

ID roughness: Ra 0.4 (max.)       Length: 3 – 9 m