Product Details

ABOUT OUR COMAPANY --

we are the top 5 manufacture of precision seamless steel tube in China ,we have passed ISO 9001 verified certification ,our company mainly produces various specifications cold finished steel tube , which are widely used in hydraulic cylinder ,automobile ,oil drillling ,textil machinery ,engineering machinery ,and so on . if you are interested in our product welcome to our company to visiting and negotiate .

ABOUT OUR PRODUCT

Product Item	hydraulic cylinder honed precision seamless H8 h9 tolerance steel tube
Outer Diameter	30mm~250mm
Wall Thickness	2mm~30mm
Material Grade	10#-45#, 16Mn, Q195-Q345, ST35-ST52, STB35-STB42, 20#, 45#, 16Mn, Q345, ST35, St45, St52, St52.4, STB42, 16Mn,St52,10#-45#,ST35-ST52
Standard	ASTM, DIN, ASTM A1020-2002, DIN 2391
Application	Hydraulic Pipe, Hydraulic cylinder, automobile, oil drilling, textile machinery
Certificate	ISO9001:2008
Process Method	Cold Drawn/ Cold Rolled
Surface Finish	Annealed, Pickled
Package	According to the customer’s requirement
Delivery Time	10days more or according to the customer’s requirement
Price Item	FOB CIF EXW
Payment	T/T(30% in advance, 70% against the BL Copy) and L/C at sight or as negotiation
ID tolerance	H8,H9b H10 or as customized
Surface roughness	Ra0.2~0.8µm
Finally supply condition	BK BKS BKW NBK GBK

Mechanics performance:
Material	Tensile strength	Yield strength	Elongation	Hardness
CK20/20#/AISI1020	>520 N/ mm2	>375 N/mm2	>15%	>85HB
CK45/45#/AISI1045	>600 N/ mm2	>520 N/ mm2	>15%	>85HB
ST52/16Mn/Q345D	>600 N/ mm2	>520 N/ mm2	>15%	>85HB
25Mn/STKM 13C-T	>600 N/ mm2	>530 N/ mm2	>15%	>85HB

Variety :
Processing	Cylinder Diameter	Straightness	Size Accuracy	W.T/mm	Inner Bore Roughess
Cold drawn/cold rolled	ID30-250	0.3	H9-H11	±10%	0.4~1.6um
Honed tube	ID50-250	0.3	H7-H9	±10%	<0.4um

Tolerance on ID:
No.	Inside diameter (mm)	ID machining allowance (mm)
1	300-80	0.5-0.8
2	81-125	0.7-1.1
3	125-200	0.9-1.2
4	200-250	1-1.5
Other dimension can be customize