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Cold drawn precision seamless tubes

DIN Series tube (DIN2391, DIN1629,DIN1630)

 

Size range

Outer Diameter: 1.5mm-60mm
Wall Thickness: 0.3mm to 10mm
 

(%)Chemical Composition 

Standard

Steel Grade

Material Number

C    MAX

Si     MAX

Mn

P    MAX

S    MAX

DIN 2391

 ST35

1.0308

0.17

0.35

≧0.4

0.025

0.025

ST45

1.0408

0.21

0.35

≧0.4

0.025

0.025

ST52

1.058

0.22

0.55

≦1.60

0.025

0.025

DIN 1629

ST37

1.0254

0.17

0.55

≦1.60

0.04

0.04

ST44

1.0258

0.21

0.55

≦1.60

0.04

0.04

ST52

1.0421

0.22

0.55

≦1.60

0.04

0.035

DIN1630

ST37.4

1.0255

0.17

0.35

≧0.35

0.04

0.04

ST44.4

1.0257

0.21

0.35

≧0.4

0.04

0.04

ST52.4

1.0281

0.22

0.55

≦1.60

0.04

0.035

 

Mechanical properties

Standard

Steel Grade

Material Number

BK

BKW

BKS

GBK

NBK

Rm Tensile Strength (Mpa)

A Elongation(%)

Rm Tensile Strength (Mpa)

A Elongation(%)

Rm Tensile Strength (Mpa)

Rel Yield Strength(Mpa)

A Elongation(%)

Rm Tensile Strength (Mpa

A Elongation(%)

Rm Tensile Strength (Mpa)

Rel Yield Strength(Mpa)

A Elongation(%)

DIN 2391

 ST35

1.0308

480

6

420

10

420

315

14

315

25

340-470

235

25

ST45

1.0408

580

5

520

8

520

375

12

390

21

440-570

255

21

ST52

1.058

640

4

580

7

580

420

10

490

22

490-630

355

22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standard

Steel Grade

Material Number

Yield Strength Reh (Mpa)

Tensile strength Rm (Mpa)

Elongation  A

 

 

 

 

 

DIN 1629

ST37

1.0254

235

350-480

25

 

 

 

 

 

 

 

 

 

ST44

1.0258

275

420-550

21

 

 

 

 

 

 

 

 

 

ST52

1.0421

355

550-650

22

 

 

 

 

 

 

 

 

 

DIN1630

ST37.4

1.0255

235

350-480

25

 

 

 

 

 

 

 

 

 

ST44.4

1.0257

275

420-550

21

 

 

 

 

 

 

 

 

 

ST52.4

1.0281

355

550-650

22

 

 

 

 

 

 

 

 

 

 
Certificates: according to EN 10204 3.1
Inspection Items:  Tensile stength, Yield stength, Elongation, Flattenging, Flaring
Chemical analysis
Eddy Current Test 100%, Size and surface checking 100%
Other test item can be arranged as per request
 

Additional surface treatment:
1. Black phosphated
2. Galvanizing ( White/silver galvanizing, Yellow or Olive green galvanizing is avaible)
 

APPLICATIONS
1. Automotive fields
    A. Powertrain system: Fuel lines, oil lines, common rail diesel lines,Piston-Cooling Jets,Oil- & Water-Cooling Pipes,Rigid Pipes.
    B. CNG (Compressed Nature Gas) tube-- Burst pressure: 1307Bar, Working Pressure: around 350bar.
    C. Drive transmission: Steering column elements (power steering feed pipe),Gear shafts(Ingrain gear pipes).
    D. Fluid handling system: Tube assemblies,Air condition tube, Clutch actuator pipes.
    E.  Others like hand brake, front axles, airbag inflators, stabilizers, seat fasteners, front-wheel drive shafts,Sunshading board wire tube.
2. Hydraulic Fields
    A. Hydraulic circuits (HPL), pneumatic lines, and hydraulic suspension system.
    B. Hydraulic cylinders (HPZ).
3. Mechanical Usage
4. Marine industries
5. Boiler industry, Air condition industry, Power station equipments, Mahine tools industry, Aeronautics and Astronautics, Petrochemical and others.