Honed Tubes for Hydraulic/ Pneumatic Cylinder

Grade: ST 52,ST52.3,CK45, E355, 16Mn, STKM13C, SAE1020, SAE1026, SAE1045

Size range

Inside diameter from 40 to 1000mm, Max length 20 meters.

 

Straightness: 0.5 /1000

Tolerance EXT: DIN 2391

Tolerance INT: ISO H8

Roughness(Ra): 0.2 to 0.4µ

Type: cold drawing, normalizing treatment, honing.

Chemical composition(%)

Si(Max)	Mn (Max)	C Max)	P (Max.)	S (Max)
0.55	1.60	0.22	0.025	0.25

Mechanical properties:

Tensile strength Min	Yield Point Min	Elongation % Min
580 N/mm2	420 N/mm2	10

 

Marking: SunnySteel, ID, OD

Length: unfixed length or fixed length

Package: banding with steel strips, braiding parcel at outside

Conservation: Anti rust oiled coating on the inside and outside of the surface, plastic caps at both ends.

Impact test: -20℃, 27 J (only for special requirement)

Tolerance standard:

ID(mm)	TOLERANCE(mm)
	H7	H8	H9	H10
≦30	+0.021/0	+0.033/0	+0.052/0	+0.084/0
30 - ≦50	+0.025/0	+0.039/0	+0.062/0	+0.100/0
50 - ≦80	+0.030/0	+0.046/0	+0.074/0	+0.120/0
80 - ≦120	+0.035/0	+0.054/0	+0.087/0	+0.140/0
120 - ≦180	+0.040/0	+0.063/0	+0.100/0	+0.160/0
180 - ≦250	+0.046/0	+0.072/0	+0.115/0	+0.185/0
250 - ≦315	+0.052/0	+0.081/0	+0.130/0	+0.210/0
315 - ≦700	+0.057/0	+0.089/0	+0.140/0	+0.230/0