Hydraulic Cylinder Honed Tube , Mechanical Tubing Corrosion Resistant

Hydraulic Cylinder Honed Tube , Mechanical Tubing Corrosion Resistant

Description:Product Details:Plac...

Product Details

Product Details:

Place of Origin:China
Brand Name:HY
Certification:ISO9001:2008

Payment & Shipping Terms:

Minimum Order Quantity:5 tons
Price:Negotiation
Packaging Details:Anti rust oil to be applied on material and each rod to be packed in paper sleeve
Delivery Time:30days
Payment Terms:L/C, T/T
Supply Ability:30tons a day


Hydraulic Cylinder Honed Tube , Mechanical Tubing Corrosion Resistant

 

 

Detailed Product  Description

Cold drawn seamless tubes for mechanical and automotive components have the precise tolerance 

as per design purpose, especially for the small outside diameter and heavy wall tube which is beyond 

the limit of the welded tube size range. By cold drawing, the mechanical properties get increased.

 

 

Specifications Comparison table

 

Items

China

Steel Grade

European 

Uion

Steel Grade

American

Steel Grade

Germany

Steel Grade

Precision 

Seamless 

Tube

GB3639

10

20

35

45

30CrMo

42CrMo

EN 10305-1

E 215

E235

E355

C35E

C45E

30CrMo4

42CrMo4

AST M

A519

1010

1020

1026

1045

4130

4140

DIN2391

BK

BK S

ST 35

ST 37

ST 45

ST 52

 

 

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Chemical&mechanical properties

EN 10305/EN 10305-4

DIN2391

Chemical 

composition

%(max)

Steel Gr,

C

Si

Mn

P

S

Chemical 

composition

%(max)

Steel Gr.

C

Si

Mn

P

S

E215

0.10

0.35

0.70

0.025

0.025

ST 35

0.10

0.35

0.40

0.025

0.025

E235

0.17

0.35

1.20

0.025

0.025

ST 37

0.17

0.35

1.20

0.025

0.025

E355

0.22

0.55

1.60

0.025

0.025

ST 52

0.22

0.55

1.60

0.025

0.025

Delivery Condition

Delivery Condition

+C

No heat treatment after

the final cold drawing process

BK

Tubes do not undergo heat treatment 

following the final cold forming and, 

thus, have a rather high resistance 

to deformation

+LC

After the final heat treatment 

there’s a suitable drawing pass

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)

+SR

After the final cold drawing 

process there’s a stress relief 

heat treatment in controlled 

atmosphere

BKS

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

+A

After the cold drawing process the 

tubes are annealed in 

a controlled atmosphere

GBK

The last cold forming process

 is followed by a nnealing in 

a controlled atmosphere

+N

After the final cold drawing 

operation the tubes are normalized 

in a controlled atmosphere

NBK

The last cold forming process 

is followed by annealing above the

upper transformation point in a 

controlled atmosphere

Mechanical Properties

Mechanical Properties

 

Steel Gr.

+C

+LC

+SR

+A

+N

 

Steel Gr.

BK

BKW

BKS

GBK

NBK

Tensile 

Strength 

(Rm)(MPa)

Min

E215

430

380

380

280

290-430

Tensile 

Strength 

(Rm)(MPa)

Min

ST 30AL

430

380

380

280

290-430

E235

480

420

420

315

340-480

ST 37

440

370

380

315

340-470

E355

640

580

580

450

490-630

ST 52

640

580

580

450

490-630

Yield 

Strength 

(ReH)(MPa)

Min

E215

≥0.8Rm

≥0.7Rm

280

≥0.5Rm

215

Yield 

Strength 

(ReH)(MPa)

Min

ST 30AL

≥0.8

Rm

≥0.7

Rm

280

≥0.5

Rm

215

E235

≥0.8Rm

≥0.7Rm

280

≥0.5Rm

235

ST 37

≥0.8

Rm

≥0.7

Rm

280

≥0.5

Rm

235

E355

≥0.8Rm

≥0.7Rm

450

≥0.5Rm

355

ST 52

≥0.8

Rm

≥0.7

Rm

420

≥0.5

Rm

355

Elongation 

%

E215

8

12

16

30

30

Elongation 

%

ST 30AL

6

10

16

25

25

E235

6

10

16

25

25

ST 37

6

10

16

25

25

E355

4

7

10

22

22

ST 52

4

7

10

22

22

a. ST 30Al with Aluminium composition min 0.025%

OD TOLERANCE







OVER

UP TO AND INCLUDING

TOLERANCE







MM

MM

MM+/-







 

30

0.10







50

70

0.15







WALL TOLERANCE







The tolerance including ecentricity, shall be +/- 10% with a minimum of +/- 0.10mm













STRAIGHTNESS







Tubes shall not depart from straightness by more than 1.5 mm/m








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