Specifications

Hydraulic Cylinder Cold drawn H7 honed pipe Competitive Price
1 ID30-250mm W.T.2-30mm
2 ISO DIN2391
3.MOq:5MT
4.Competitive

Commodity name:  Hydraulic Cylinder Cold drawn H7 honed pipe Competitive Price

 

1.Grade: 20#(ck20,aisi1020),45#(ck45,aisi1045),st52(16Mn,Q345D),25Mn(stkm13c-t),27SiMn

 

2.ID:30-250mm

 

3.ID tolerance:H8,H9

 

4.Surface roughness:Ra 0.02— 0.4μm

 

5. Final supply condition:cold drawn and stress-relieved(BK+S)

 

6. Machining allowance:0.5-1.5mm

 

7.Wall thickness:10%×ID

 

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

 

 

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

 

 

Dimension tolerance

 

ID size	ID deviation (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
>315~400	+0.0527 0	+0.089 0	+0.140 0	+0.230

 

Delivey conditions:

 

• Standard packing with plastic caps and strapped bundles.
• Commercial length 2000~10500mm,custom lengths upon request
• Surface protection
  

We can supply precision cold drawn tube,honed tube,hydraulic pipe,hydraulic cylinder tube also cold drawn welded tube, cold rolled tube, all assure the best quality and competitive price

 

 

Production Process:

Pretreatment : Acid cleaning- Parkerizing

Cold drawn/cold rolled

Annealing furnace——+SR

Straightener—— Straightening

Straightness inspecting

Dimension inspecting

Sawing

Lathe

Polishing Finished products

Honed Srb

Package

 

 Any need or intrest, please feel free to contact us!