Product Details

Outer diameter: 30-300mm

ID tolerance: H7 H8 H9

Package: standard package with plastic bags or wooden cartons or as client's request

Delivery time: within 20-30 days after receiving downpayment or as client's request

Trade term: FOB Yantai, Qingdao or as client's request

Payment term: T/T or L/C or as client's request

Application: hydraulic cylinder for heavy machine, excavator, textile machine, oil drilling and other field

Main products

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.

The difference between precision steel pipe and seamless pipe:

1. the seamless steel tube with obvioue difference is that dimensional accuracy, can be up to 0.1mm.

2. high precision steel pipe diameter surface finish, the customer without processing can be used directly and ordinary seamless steel tube to the customer and lather, polishing processing.

Mechanical Property

Delivery Condition	Cold drawn+stress-relieved(BK+S)(SR)			Cold finished(hard)(BK)
Steel Grade	Tensile strength (Rm Mpa)	Yield strength (ReH Mpa)	Elongation A5%	Tensile strength (Rm Mpa)	Elogation A5%
20#	≥520	≥375	≥15	≥550	≥8
45#	≥600	≥520	≥10	≥640	≥5
16Mn(Q345B Q345D)	≥600	≥520	≥14	≥640	≥5
25Mn	≥600	≥510	≥15	≥640	≥5
27SiMn	≥760	≥610	≥10	≥800	≥5
St45	≥520	≥375	≥15	≥550	≥5
E355(St52)	≥600	≥520	≥14	≥640	≥5
SAE1026	≥600	≥510	≥15	≥640	≥5

Technique and Tolerance

Working Method	Range	Size of ID	Tolerance
			ID tolerance			WT(mm)	Ovality	Curvature
			H8	H9	H10	WT(mm)	Ovality	Curvature
Cold Drawn	25-250	>30-50	+0.0390	+0.0620	+0.1000	±5% to 7.5% ID>210mm ±10%	≤0.10-0.20	0.3
Cold rolling	25-150	>50-80	+0.0460	+0.0740	+0.1200
Cold drawn-hone	40-250	>80-120	+0.0540	+0.0870	+0.1400
Cold drawn-SRB	50-250	>120-180	+0.0630	+0.1000	+0.160
Cold drawn-polish	40-250	>180-250	+0.0720	+0.1150	+0.1850
Cold drawn-polish-SRB	50-250	Other size and technique parameter upon request

Application

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, forestrymachinery, etc.

Delivery condition

1. NBK(+N)

after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium

2. GBK(+A)

after cold forming, annealing in non oxidizing medium protective gas

3. BK(+C)

the final heat treatment after cold forming, therefore small steel pipe plastically, the plastically degree does not guarantee

4. BKW(+LC)

after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)

5. BKS(+SR)

have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing.

Service

1. Cargo track service during transporting and feedback service after cargo is loaded on board

2. Flexible terms of payment by T/T , L/C And so on.

3. Big discount for repeat customers

4. Smooth delivering procedure

5. More than 20 years steel trading experience

6.Alibaba trade assurance supplier

More products details pls contact us!