St52 Hydraulic Cylinder Tube

St52 Hydraulic Cylinder Tube Introduction Honed Tubes are presicion tubes with smooth inside, they also could be skived and burnished pipe. Tubes or pipes inside tolerance could be H10, H9 or H8. Outside tolerance, wall thickness tolerance are produced according to seamless cold drawn tubes for...
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St52 Hydraulic Cylinder Tube Introduction

Honed Tubes are presicion tubes with smooth inside, they also could be skived and burnished pipe. Tubes or pipes inside tolerance could be H10, H9 or H8. Outside tolerance, wall thickness tolerance are produced according to seamless cold drawn tubes for precision application standard GB/T3639-2009,EN10305 or DIN2391 standard. Material SAE1020, 20#, ST45, CK45, ST52, E355 tubes and so on for you to choose.

Hydraulic Cylinder Tube technical parameters and Details

Type: Pipe

Model Number: ID50-400mm

Brand Name: Hengtong

Place of Origin: Jiangsu, China (Mainland)

process: cold drawn

tolerance: H8 for tubes and f7 for rods

Condition: BKS/SR

Material: ST52/E355,CK45 

 

Size and Tolerance:

Working

method

Cylinder ID (mm)

Length

(m)

Straightness

(mm/m)

Tolerance

on ID

Tolerance

on WT

Roughness

(μm)

Cold drawn

40-320

≤12M

0.2-0.5

/

±5%

0.8-1.6

Cold rolling

30-100

≥12M

0.2-0.5

/

±5%

0.8-1.2

cold drawn-

honed

40-500

8M

0.2-0.3

H8-H9

±5%

0.2-0.8

Cold drawn-skived

40-400

7M

0.2-0.3

H8-H9

±5%

≤0.4

Deep hole

boring- honed

320-400

8M

0.2-0.3

H7-H9

±8%

≤0.8

Deep hole

boring- skived

320-400

7M

0.2-0.3

H8-H9

±8%

≤0.4

Honed Tubes In Stock For Hydraulic.jpg

For bar /  rods:

1. CHEMICAL COMPOSITION

Material

C%

Mn%

Si%

S%

P%

V%

Cr%

CK45

0.42-0.50

0.50-0.80

≤0.04

≤0.035

0.035


≤ 0.25

ST52

≤0.22

≤1.6

≤0.55

≤0.04

≤0.04



20MnV6

0.16-0.22

1.30-1.70

0.10-0.50

≤0.035

≤0.035

0.10-0.20

≤0.30 

42CrMo4

0.38-0.45

0.60-0.90

0.15-0.40

≤0.035

≤0.035

0.07-0.12

0.90-1.20

40Cr

0.37-0.45

0.50-0.80

0.17-0.37

≤0.035

≤0.035


0.80-1.10

2. MECHANCIAL PROPERTIES

Material

T.S  N/MM2

Y.S  N/MM2

E%(MIN)

CHARPY

CONDITION

CK45

610

355

15

>41J

NORMALIZE

CK45

800

630

20

>41J

Q + T

ST52

500

355

22


NORMALIZE

20MnV6

750

590

12

>40J

NORMALIZE

42CrMo4

980

850

14

>47J

Q + T

40Cr

1000

800

10


Q + T

3. SUPPLY CONDITION

Ground and chrome plated , induction, quenched and tempered

4. CHROME THICKNESS

20 to 30 micron

5. SURFACE ROUGHNESS

Ra≤0.2 micron and  Rt≤2 micro

6. TOLERANCES ON DIA

ISO f7 on the diameter

7.OVALITY

Half of the tolerance ISO f7

8. STRAIGHTNESS

≤0.2MM/M

9. SURFACE HARDNESS

850-1150HV (vickers 100g)

10.COHESION

No cracks,breaking or detaching after thermic shock(warming up at 300 celsius degrees and cooling in water)

11.POROSITY

Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10

12.CORROSION RESISTANCE

Test in natural salt spray according to ASTM B 117-72hours

Results evaluation according to ISO 4540 RATING 7-10

13.PACKING

Anti rust oil to be applied on material and each rod to be packed in paper sleeve

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