hydraulic&pneumatic cylinder tube...kwk steel featured product precision steel tube en10305 cold...

KWK STEEL CO.,LTD ISO9001:2008 Tel:+86-576-88808821 Fax:+86-576-88809380 Email:[email protected]

Http://www.kwksteel.com

Address: E813,Xintai Square Building,Jiaojiang District,Taizhou,Zhejiang,China 318000

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KWK STEEL FEATURED PRODUCT

Hydraulic&Pneumatic Cylinder Tube

Size: O.D.: 6.0-650.0mm W.T.: 1.0-65.0mm Length: Max.12000mm

Description: Hydraulic&Pneumatic Cylinder Tube, cold drawing seamless. And we've been especially involved in this kind of product. We exported large quantity to many European countries. Customized technical specification for the providing of seamless precision tubes suitable to the hydraulic and pneumatic cylinders industry.

This kind of tube concern seamless steel cold drawn tubes suitable for the telescopic, piston rods, hydraulic-oleo dynamic cylinder manufacturing and fix their dimensions, tolerances, chemical composition, mechanical properties and delivery technical conditions.

The product is supplied with inside diameter skiving-burnishing or honing-lapping stock allowance.

As well, we supply our customers extra requirements stricter than standard like Tolerance, Eccentricity, Straightness, Ovality, etc.




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Precision Steel Tube DIN2391

Application:

Cold drawn or cold rolled precision seamless steel tubes for hydraulic pressure and pneumatic services.

For Auto. use, machinery use, oil cylinder tube, motorcycle shock reducer use, auto shock reducer inner cylinder, etc.

Size: O.D.: 6.0-650.0mm W.T.: 1.0-65mm Length: Max.12000mm

Steel Grade and Chemical Composition(%) Standard Grade C≤ Si≤ Mn P≤ S≤

St35 0.18 0.35 ≥0.40 0.025 0.025 St45 0.22 0.10-0.35 ≥0.40 0.025 0.025

DIN2391

St52 0.22 0.55 ≤1.60 0.025 0.025




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Final Supply Condition Symbol Designation Description BK Cold

finished(hard) Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.

BKW Cold finished(soft)

The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming(e.g. bending, expanding)

BKS Cold finished and stress-relieved

Heat treatment is applied following the last cold forming process, subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.

GBK Annealed The last cold forming process is followed by annealing in a controlled atmosphere.

NBK Normalized The last forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Mechanical Properties Rm:Tensile Strength(Mpa) ReH:Yield Point(Mpa) A%:Elongation Mpa=N/mm2

BK BKW BKS GBK NBK Standard Grade

Rm≥ A%≥ Rm≥ A%≥ Rm≥ ReH≥ A%≥ Rm≥ A%≥ Rm≥ ReH≥ A%≥ St35 480 6 420 10 420 315 14 315 25 340-470 235 25 St45 580 5 520 8 520 375 12 390 21 440-570 235 21 DIN2391 St52 640 4 580 7 580 420 10 490 22 490-630 355 22




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Precision Steel Tube EN10305

Cold drawn or cold rolled precision seamless steel tubes for hydraulic pressure and pneumatic services. For Auto. use, machinery use, oil cylinder tube, motorcycle shock reducer use, auto shock reducer inner cylinder, etc.

Application: Steel tubes for precision applications.

Size: O.D.: 6.0-650.0mm W.T.: 1.0-65mm Length: Max.12000mm

Steel Grade and Chemical Composition(%) Standard Grade C≤ Si≤ Mn≤ P≤ S≤ Al

E215 0.10 0.05 0.70 0.025 0.025 ≥0.025 E235 0.17 0.35 1.20 0.025 0.025 / EN10305 E355 0.22 0.55 1.60 0.025 0.025 /




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Final Supply Condition Symbol Designation Description +C Cold drawn(hard) No heat treatment after the final cold drawing

process. +LC Cold drawn(soft) After the final heat treatment there is a

suitable drawing pass. +SR Cold drawn and

stress-relleved After the final cold drawing process there is a stress relief heat treatment in a controlled atmosphere.

+A Annealed After the final cold drawing process the tubes are annealed in a controlled atmosphere.

+N Normalized After the final cold drawing operation the tubes are normalized in a controlled atmosphere.

Mechanical Properties For EN10305 Rm:Tensile Strength(Mpa) ReH:Yield Point(Mpa) A%:Elongation Mpa=N/mm2

Minimum values for the delivery condition(Exclude +N Rm) +C +LC +SR +A +N Grade

Rm≥ A%≥ Rm≥ A%≥ Rm≥ ReH≥ A%≥ Rm≥ A%≥ Rm ReH≥ A%≥ E215 430 8 380 12 380 280 16 280 30 290-430 215 30 E235 480 6 420 10 420 350 16 315 25 340-480 235 25 E355 640 4 580 7 580 450 10 450 22 490-630 355 22

hydraulic&pneumatic cylinder tube...kwk steel featured product precision steel tube en10305 cold...

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