Product Details

Hydraulic Cylinder using Cold finished and SRb pneumatic tube

HONED TUBE

Grade:ST 52

Metric size:

Inside diameter from 40 to 250mm

Max length 14m.

Straightness: 0.5 /1000
Tubes are provided according to the norm EN10305-1

Type:cold drawing

CHEMICAL COMPOSITION (%)

Si(Max)	Mn(Max)	C(Max)	P (Max.)	S(Max)
0.50	1.6	0.22	0.025	0.025

MECHANICAL PROPERTIES

Tensile strength

Min

Yield Point

Min

Elongation

% Min

580N/mm²

420N/mm²

EXCENTRICITY

Outer Diameter	Excentricity
< =125 mm	5 %
> 125 mm	7 %

measured according to the formula:

E = (max Wt – min Wt)/( max Wt + min Wt) x 100 %

BORE OVALITY

The bore ovality is comprised in the 50 % of the inside diameter tolerances.

Marking: 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°C, 27 J (only for special requirement)

Production Process:

Pretreatment : Pickling—Phosphating—Saponification

Cold drawn/cold rolled

Annealing furnace——+SR

Straightener—— Straightening

Straightness inspecting

Dimension inspecting

Sawing

Lathe

Polishing

Products inspecting

Finished Products

Our Reputation

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.

Technique Parameter

Material	(OD)(mm)	(ID) (mm)	(Tolerance)
Material	(OD)(mm)	(ID) (mm)	OD(mm)	ID(mm)	W.T(mm)	Ovality	Curvature
20# 45# Q345D 25Mn 42CrMo 27SiMn St35 St45 St52 St52.4 STKM13CT A519 …	40-74	30-65	±0.01	-0.3,-0.5	≤0.5	≤0.1	0.3
	74-98	65-85	±0.01	-0.4,-0.6	≤0.5	≤0.15	0.3
	100-116	85-100	±0.02	-0.4,-0.6	≤0.6	≤0.15	0.3
	124-134	110-115	±0.02	-0.6-0.8	≤0.6	≤0.20	0.3
	140-158	120-135	±0.02	-0.7,-0.9	≤0.8	≤0.20	0.3
	165-176	140-150	±0.02	-0.7,-0.9	≤0.8	≤0.20	0.3
	188-203	160-180	±0.02	-0.7,-0.9	≤0.8	≤0.20	0.3