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Product

EN10305-4 E235+NBK Precision Hydraulic Steel Tube for hydraulic systems

Name: EN10305-4 E235+NBK precision Hydraulic Steel Tube

Standard: EN10305-4

Type: Cold rolled/cold drawn

Grade: E235/E355

Size:  OD4mm-219mm WT0.5mm-25mm

Condition: BK/NBK/GBK etc.

Mill Test Certificate:  EN10204 3.1

Processing: Bending/ Cutting.


Product Detail

Product Tags

Product Detail

EN10305-4 steel tubes could be bending, flaring and flattening without crack. It has high precision, on oxide layer on both sides of the tube. It can be used for various complex deformation and machining.  EN10305 high precision  steel tube is usually used for hydraulic cylinder, diesel, hydraulic pump station and hydraulic system which are require the steel tube in high precision and cleanliness.

Advantages

AS

Certificates: according to EN 10204 3.1

Inspection Items:

Tensile strength,

Yield strength,

Elongation,

Flattening,

Flaring

Chemical analysis

Eddy Current Test 100%,

Size and surface checking 100%

Other test item can be arranged as per request

Specification

 Standard

 EN10305 DIN2391 DIN1630 DIN2445 JIS G3445 SAE J524

Grade

ST35/E235 ST37.4 ST45/E255 ST52/E355

Delivery Condition

NBK(+N) BK(+C)    GBK(+A) BKW(+LC) BKS(+SR)

Size

OD:4 to 219mm Thickness 0.5-35mm, Length:  3m,5.8,6 or according to requirements

Finish

Galvanized surface (Sliver/Yellow/Colorful) Zinc coating of 8-12um

 Application

Hydraulic System; Car/bus; construction vehicle

 Delivery time

A.3 days if this good is stock goods.

B. About 30 days according to the quantity

HYDRAULIC PRECISION STEEL TUBE IN STOCK

OD

Thickness(mm)

mm

 

4

4*1

 

 

 

 

 

 

 

 

 

6

6*1

6*1.5

6*2

 

 

 

 

 

 

 

8

8*1

8*1.5

8*2

 

 

 

 

 

 

 

10

10*1

10*1.5

10*2

10*2.5

 

 

 

 

 

 

12

12*1

12*1.5

12*2

12*2.5

12*3

 

 

 

 

 

14

14*1

14*1.5

14*2

14*2.5

14*3

 

 

 

 

 

15

15*1

15*1.5

15*2

15*2.5

15*3

15*3.5

 

 

 

 

16

16*1

16*1.5

16*2

16*2.5

16*3

16*3.5

16*4

16*4.5

 

 

18

18*1

18*1.5

18*2

18*2.5

18*3

18*3.5

18*4

18*4.5

 

 

20

20*1

20*1.5

20*2

20*2.5

20*3

20*3.5

20*4

20*4.5

20*5

 

22

22*1

22*1.5

22*2

22*2.5

22*3

22*3.5

22*4

22*4.5

22*5

 

25

25*1

25*1.5

25*2

25*2.5

25*3

25*3.5

25*4

25*4.5

25*5

 

28

28*1

28*1.5

28*2

28*2.5

28*3

28*3.5

28*4

28*4.5

28*5

 

30

30*1

30*1.5

30*2

30*2.5

30*3

30*3.5

30*4

30*4.5

30*5

30*6

32

 

32*1.5

32*2

32*2.5

32*3

32*3.5

32*4

32*4.5

32*5

32*6

34

 

34*1.5

34*2

34*2.5

34*3

34*3.5

34*4

34*4.5

34*5

34*6

35

 

35*1.5

35*2

35*2.5

35*3

35*3.5

35*4

35*4.5

35*5

35*6

38

 

 

38*2

38*2.5

38*3

38*3.5

38*4

38*4.5

38*5

38*6

40

 

 

40*2

40*2.5

40*3

40*3.5

40*4

40*4.5

40*5

40*6

42

 

 

42*2

42*2.5

42*3

42*3.5

42*4

42*4.5

42*5

42*6

45

 

 

45*2

45*2.5

45*3

45*3.5

45*4

45*4.5

45*5

45*6

46

 

 

46*2

46*2.5

46*3

46*3.5

46*4

46*4.5

46*5

46*6

48

 

 

48*2

48*2.5

48*3

48*3.5

48*4

48*4.5

48*5

48*6

50

 

 

50*2

50*2.5

50*3

50*3.5

50*4

50*4.5

50*5

50*6

54

 

 

 

54*2.5

54*3

54*3.5

54*4

54*4.5

54*5

54*6

60

 

 

 

60*2.5

60*3

60*3.5

60*4

60*4.5

60*5

60*6

65

 

 

 

 

65*3

65*3.5

65*4

65*4.5

65*5

65*6

75

 

 

 

 

 

75*3.5

75*4

75*4.5

75*5

75*6

76

 

 

 

 

 

 

76*4

76*4.5

76*5

76*6

89

 

 

 

 

 

 

 

 

 

89*6

Note: We could produce other sizes as your requirements.       Surface Treatment: Bright, Galvanized, Phosphated etc.

Chemical Composition

 Steel Grade

C

Si

Mn

P

S

Al

Name

No.

max

max

max

max

max

max

E215

1.0212

0.1

0.05

0.7

0.025

0.015

0.025

E235

1.0308

0.17

0.35

1.2

0.025

0.015

E355

1.058

0.22

0.55

1.6

0.025

0.015

ST35

1.0308

0.17

0.35

0.4(min)

0.025

0.025

ST45

1.0408

0.21

0.35

0.4(min)

0.025

0.025

ST52

1.058

0.22

0.55

1.6

0.025

0.025

Mechanical properties

 Steel Grade

Yield Strength (Mpa) Tensile Strength (Mpa) Elongation(%)

Name

No.

ReH (min) Rm(min)

A(min)

E215

1.0212

215

290 to 430

30

E235

1.0308

235

340 to 480

25

E355

1.058

355

490 to 630

22

ST35

1.0308

235

340 to 480

25

ST45

1.0408

255

440 to 570

21

ST52

1.058

355

490 to 630

22

Tolerance

OD

Allowable tolerance

Special Tolerance

 

GB/T3639

DIN2391

OD

WT

4mm-20mm

±0.10mm

±0.08mm

±0.05mm

±0.05mm

20mm-30mm

±0.10mm

±0.08mm

±0.08mm

±0.08mm

31mm-40mm

±0.15mm

±0.15mm

±0.10mm

±0.08mm

41mm-60mm

±0.20mm

±0.20mm

±0.15mm

±0.15mm

61mm-80mm

±0.30mm

±0.30mm

±0.20mm

±0.20mm

81mm-120mm

±0.45mm

±0.45mm

±0.30mm

±0.30mm

Delivery Condition

Designation

Symbol

Description

Cold finished (hard) BK(+C) Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation
Cold finished (Soft) BKW 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)
  (+LC)  
Cold finished and stress-relieved BKS(+SR) 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.
Annealed GBK(+A) The last Cold forming process is followed by annealing in a controlled atmosphere.
Normalized NBK(+N) The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Quality Assurance

1.Strict according to DIN2391/EN10305 or other standards.

2. Sample: Sample is free for test.

3. Tests: Salt spray test/Tensile test / Eddy current / Chemical composition test according to customers' request

4.Certificate: IATF16949, ISO9001, SGS etc.

5.EN 10204 3.1 Certification

Application

ASD
ASD

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