Steel Pipes for Pipeline, Vessel and Equipment Structures DIN1629

Categories:

Standards:
ASTM A519, DIN1629, DIN2391, ASTM A513, BS6323, EN10305-1, JIS3441

Application:
It is used for manufacturing pipeline, vessel, equipment, pipe fittings and steel structure.

Main Steel Tube Grades:
St37.0, St44.0, St52.0

Chemical Composition (%):

Standard

Grade

C

Si

Mn

P

S

Cr

Ni

Cu

V

Q/BQB 203
DIN1629

ST37.0

≤0.17

0.17-0.37

0.35-0.65

≤0.025

≤0.020

≤0.25

≤0.25

≤0.25

ST44.0

≤0.21

0.17-0.37

0.50-0.80

≤0.025

≤0.020

≤0.25

≤0.25

≤0.25

ST55

0.33-0.41

0.17-0.37

0.50-0.80

≤0.025

≤0.020

≤0.25

≤0.25

≤0.25

ST52.0

≤0.22

≤0.55

≤1.60

≤0.025

≤0.020

≤0.25

≤0.25

≤0.25

CK45

0.42-0.50

0.17-0.37

0.50-0.80

≤0.025

≤0.020

≤0.25

≤0.25

≤0.25

Note: Grades other than the a.m. chart can be made available through consultations.

Mechanical Properties:

Standard

Grade

Tensile Strength
(MPa)

Yield Strenght
Not less than

Elongation
Not less than

Impact Test

≤16mm

>16-30mm

Temperature
(℃)

Absorbed Energy
(KV/J)

Q/BQB203
DIN1629

≤16mm

>16mm

ST37.0

350-480

235

225

25

ST44.0

420-550

275

265

21

ST55

540-645

295

285

17

ST52.0

500-650

355

345

21

CK45

590-730

335

325

14