Wang Shengjun

Steel Grade: ST52/E355
Production Standard : EN 10305 E355+SR /DIN2391 ST52+BKS
Inside Diameter Tolerance: H7 - H9
Inside Surface Finish: Ra 0.3 Micron, or better.
Straightness between 0.2-0.3mm/meter.
ID: 30-1200mm.
WT: 3-100mm.

Both ends capped and oiled in bundle, suitable for shipment

Across several industries, a hydraulic cylinder tube is referred to as a Honed tube. One of the most important materials of manufacturing hydraulic cylinders are Honed Tubes. This type of tubing is ordinarily honed in the inside diameter of a Ready to Honed Tube. Which is why it is also known as honed ID tubing. Honing is an abrasive or a grinding machining process that delivers a precision surface on a metal workpiece for e.g. Hydraulic Tubes. During this process, an abrasive grinding stone or grinding wheel is scrubbed against a Pre Honed Tube along a hegemonized path. Honing is a process which is fundamentally used to enhance the geometric form of a surface.

Standards:
DIN 2391 Seamless Precison Steel Tubes
EN10305 Steel Tubes for Precision Applications Seamless Cold Drawn Tubes
ASTM A519 Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing
JIS G3445 Carbon Steel Tubes for Machine Structural Purposes

Materials:
ST52 ST45 E355 1020 1026

Specifications
Material:20# 45# 16mn 27simn st52, bk+s, din2391, astm a 106 or according to your requirement.
Standard: gb/t8713-88 gb/t3639-2000 din 2391 en10305 or according to your requirement.
Straightness:0.3~0.8mm/m or according to your requirement
Elongation: 14%-25% or according to your requirement.
Id tolerance:h7-h8
Application:
Mining industry, machinery processing, natural gas oil transportation exploitation etc.
Process:
Cold-drawn, cold-rolled, honed, srb


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Honed Tube/Seamless Hone Tube/Hydraulic Cyinder Tube
Grade: ST 52.3,CK 45,E 355,16Mn,STKM-13C,SAE1020,SAE 1045
Metric size: O.D: 30 to 1000mm, Max length 12m.
Straightness: < 0.2/1000
Tolerance EXT: DIN 2391
Tolerance INT: ISO H7,H8 ,H9,H10
Roughness(Ra): 0.2 to 0.4 Micron
Type:cold drawing,seamless honed,skived and burnished,BK+S

Raw material is mainly from some famous refinery steel mills, such as BAO STEEL, Tianjin, and Chengdu etc, which are the best and largest raw material manufacturers in China. we have been through ISO9001:2000 international quality system certification. Warranty period for our honed tubes and chrome bars is 2 years. For some special or important customers, the period is 5 years.
2. We own 35 sets honing machines producing tube ID from 38.1mm to 1000mm, at max length of 18m.
3. We own 18 sets of equipment for piston rod in completely production, producing OD from 12mm to 500mm, at max length of 16m.
Plate according to customers different requirements such as Chrome, Nickel, and Ceramic. Thickness is from 10m to 100m.
4. High Precision:
Honed tube (Roughness of tube is 0.2m and straightness is less than 0.15/1000), piston rod (Plating thickness is 10-100 micron. Surface roughness is 0.2m and straightness is also less than 0.15/1000)
5. Product details are completely according to International Standard, chrome rod and honed tube must be cut flatly, and no chrome marks on the surface of rod. (Most of domestic mills dont do this in order to reduce cost)
6. Delivery time is very fast. The average delivery time is 5-30 days after confirming the orders. Production output for honed tubes is about 300tons per month and 200tons for chrome bars per month.
7. Package: our packages are safer than others supplier in China. Packing for rod normally we choose is cardboard that film attached inside, which does not only prevent rods from scratch but also from oil rusting. Tubes are made with caps at both end and painted oil on inside and outside surface. For full container, extra package like parcel at outside will be used.
8. Each product will do full test (include chemical, mechanical, tolerance, roughness, chrome plate thickness, hardness, salt spray, etc). All the test report will be kept 5 years. We will make the Mill test certificate to customer if they need.

1.Seamless steel tube and carbon tube, seamless pipe

Widely used in the hydraulic cylinder of the heavy machinery, Cranes, excavator also forklifts. Material is various, mainly
STKM-13CT, ST52, CK45 and AISI 1020. We can also offer as customized seamless steel tube.

2.cold drawn steel tube/cold rolled steel tube, cold drawn pipe, cold rolled pipe, cold drawn tube, cold rolled tube

Grade: 20# 45# 16Mn 25Mn 27SiMn E355 ST52 STKM11A STKM13A ST52 S45C CK45

Standard: GB/T8713 GB/T3639 DIN2391 EN10305 ASTMA519

Range: 30-300mm

Length: 11m(max)

The cold process can change the thickness of tube to meet client's request and offer better mechanical property.

3. Honed steel tube&SRB steel pipe, honed tube, honed tubes, honed steel pipe, honed pipe

ID Tolerance: H8 H9

ID Roughness: RA0.4micron(max)

Length: 6m(max)

Inner roughness: Ra0.2-0.8um

Straightness: 1:1000 or customized

This process can improve the roughness of the inner tube to 0.2-0.8um and make inside tube more smooth which can be used for
cylinder directly.

4.hydraulic cylinder steel tube, hydraulic tube, cylinder tube, hydraulic pipe, cylinder pipe

(1)Product Name
ST52 Hot Sale Cold Rolled Steel Pipe E355 Honed Tube
(2)Material
Carbon Steel Tube
(3)Outer Diameter
30-250mm
(4)Wall Thickness
2-30mm
(5)Material Grade
ST52,E355,CK45,A106,A53,SKTM11A,STKM13A,STKM13C,S45C,and so on
(6)Delivery Condition
BK/BKS/GBK/NBK
(7)Delivery time
within 20-30 days after receiving prpayment
(8)Trade Terms
FOB Yantai, Qingdao or any other China main port

We offer honed cylinder and tubes as per customers specific material and drawings. Our products are sourced from reliable vendors and are tested for quality before being sent to our customers

1.Standard sizes:
Od: 30-250mm
Wall thickness: 3-35mm
Length: 3-5.8m
Tolerance: h8
Straighness: 0.5mm/1000mm
Steel grade: 20-45#, 16mn, q345, st52, st 37, etc.
Standard: din, gb, astm, api, etc.
Non-standard sizes:
As cuetomer's request.
2.Surface treatment:
Oil painting, galvanized, chromed, or as customer's requirments.
3.Package:
Packed in bundle, with plastic caps, plastic bag, etc
4.Delivery time:
Within 30 days generally
5.Payment term:
T/t, l/c( we prefer t/t)

Astm a519 honed seamless steel tube for hydraulic cylinder

Standard: astm a519

Materials: 1020, 1035, 1045, 4130, 4140

Technical: cold-drawn seamless

Delivery condition: bk.Bkw, bk+s, gbk, nbk

Straightness: 0.5mm/1m max for tubes below 3m, 0.8mm/1m max for tubes between 3 to 6m, 1.2mm/1m for tubes above 6m

Technology: honed & srb (skived and roller burnished).

Application: used in the hydraulic cylinder of the heavy machinery, cranes, excavator and forklifts.Etc

En 10305-1 honed seamless steel tube for hydraulic cylinder

Standard: en 10305-1, en 10305-4

Materials:e215, e235, e255, e355, c35e, c45e, 25crmo4, 42crmo4

Technical: cold-drawn seamless

Delivery condition:bk.Bkw, bk+s, gbk, nbk

Straightness: 0.5mm/1m max for tubes below 3m, 0.8mm/1m max for tubes between 3 to 6m, 1.2mm/1m for tubes above 6m

Technology:honed & srb(skived and roller burnished).

Application: used in the hydraulic cylinder of the heavy machinery, cranes, excavator and forklifts.Etc