Product Details

Commodity name: precision seamless steel honed and srb cylinder tube

Main products of Yantai Xinpeng Steel Pipe Co,.Ltd

1. Hydraulic Cylinder Tube------Main products of Xinpeng,

Used in the hydraulic cylinder of the heavy machinery, Cranes, excavator also forklifts. Material is various, mainly STKM-13CT ST52 CK45 and 1020. We can work and get the mechanical property of the clients need and extended the life of the hydraulic cylinder.

2.SRB tube ----- used inElevatorbuffer and Hydraulic Cylinder .This kind tube have a better roughness inner the tube, ra0.2-0.4um and can use directly in the hydraulic cylinder tube. Range: ID 50-250mm and Length can work at most 6M.

3. Cold finished tube---- Widely Used. Processing range 30-300mm, biggest length is 11M.

Xinpeng Have passed ISo9001 verified from 2008; each tube of ours is strictly in quality control that can assure the product quality of Xinpeng.

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)

H10

+0.021

+0.033

+0.052

+0.084

>30~50

+0.025

+0.039

+0.062

+0.100

>50~80

+0.030

+0.046

+0.074

+0.120

>80~120

+0.035

+0.054

+0.087

+0.140

>120~180

+0.040

+0.063

+0.100

+0.160

>180~250

+0.046

+0.072

+0.115

+0.185

>250~315

+0.052

+0.081

+0.130

+0.210

>315~400

+0.0527

+0.089

+0.140

+0.230

Size we have stock

45*30	48*31.75	50*40	55*45
60*50	60*45	63*50	63*55
70*50	70*57	73*63	75*50
75*55	75*60	75*65	80*65
80*70	90*75	94*80	95*80
98*85	100*85	105*90	111*95
112*95	116*100	118*100	123*105
124*110	128*110	134*115	140*120
141*120	146*125	152*130	154*130
158*135	160*135	165*140	176*150
Material: 25Mn( STKM13CT) 16Mn(Q345B Q345D, St52 ) 10# (St37.2) 20# (1020 S20C CK20 St45) 45#(ck45 S45C) Standard: GBT3639 Din2391 En10305

Delivey conditions:

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

We can supply cold drawn/cold rolled seamless tube,honed tube,hydraulic tube,please feel free to contact us.

Pretreatment : Acid cleaning- Parkerizing

Cold drawn/cold rolled

Annealing furnace—— stress-relieving (+SR)

Straightener—— Straightening/ Leveling

Straightness inspecting

Dimension inspecting

Sawing ( allowance 0 +3mm tolerance)

Lathe

Surface Polishing ( can do mirror polishing also)

Finished products

Application:Hydraulic tube
widely used in hydraulic system with precision steel tube, injection molding machine with precision steel tube, hydraulic press with precision steel tube, shipbuilding with steel tube, EVA foaming, hydraulic machinery, hydraulic cutting machine, shoe making machinery, hydraulic equipment, high pressure tubing, hydraulic tubing, card sets of joints, pipe joints, rubber machinery, forging machinery, casting machinery, engineering machinery, automotive high pressure steel pipe concrete pump, sanitation vehicle, automobile industry, shipbuilding industry, metal processing, military industry, diesel engine, the internal combustion engine, air compressor, construction machinery, forestry machinery, etc.