Structural Steel Pipe

Home » Technology of Hot-Rolled Steel Pipes »

●Standards :GB/T8162-1999, ISO2937, ASTM A53, ASTM A106,JIS G 3441,BS EN 10210-1


●Function Ordinary structure and mechanical structure, greatly applied in all kinds of structural tubes in building, machinery, transportation, airline, oil exploitation and other industries.


●spec.:

OD
Wall Thickness
Unit(mm)
 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 7.0-8.0 9.0-10.0 11.0-12.0
Φ17-Φ18
●
●
●
●
Φ19
●
●
●
●
●
Φ20-Φ21
●
●
●
●
●
●
Φ22
●
●
●
●
●
●
Φ25
●
●
●
●
●
●
Φ27-Φ28
●
●
●
●
●
●
Φ32
●
●
●
●
●
●
●
Φ38
●
●
●
●
●
●
●
Φ42-Φ45
●
●
●
●
●
●
●
Φ48-Φ51
●
●
●
●
●
●
●
Φ57
●
●
●
●
●
●
●
Φ60-Φ73
●
●
●
●
●
●
●
Φ76-Φ89
●
●
●
●
●
●
●
Φ102
●
●
●
●
●
●
●
Φ108
●
●
●
●
●
●
●
Φ110-Φ114
●
●
●
●
●
●
●
Φ127
●
●
●
●
●
Φ133
●
●
●
●
●
Φ140
●
●
●
●
●
Φ159
●
●
●
●
●
●
Φ168
●
●
●
●
●
●
Φ219
●
●
●
●
Φ273
●
●
●
Φ325
●
●
●
Φ377
●
●

●Tolerance of size

Standard

Outside diameter tolerance

Wall thickness tolerance

GB/T 8162

D<50

± 0.50mm

S<4mm

± 12.5%

D≥50

± 1%

4-20mm

+15/-12.5%

S≥20mm

± 12.5%

DIN1629

D50

± 0.50mm

S2Sn

+15/-10%

D48.3D48.3

± 1%

2SnS4Sn

+12.5/-10%

S4Sn

± 9%

ASTM A53

D<48.3

± 0.4/-0.79mm

± 12.5%

D≥48.3

± 1%

ASTM A106

D<48.3

± 0.4/-0.79mm

± 12.5%

D48.3-114.3

± 0.79mm

D≥114.3

± 1.59/-0.79mm

 

●Mechanical properties

Standard

Steel grade

Tensile strength(MPa)

Yield strength (MPa)

Elongation

<16mm

16-30mm

GB/T 8162

10

335

205

195

24

20

390

245

235

20

35

510

305

295

17

45

590

335

325

14

16Mn

490

325

315

21

DIN 1629

<16mm

>16mm

ST35

345-460

235

225

25

ST45

440-550

255

245

21

ST55

540-645

295

285

17

ST52

490-630

355

345

22

ST45

590-730

335

325

14

ASTM A53

A

330

205

B

415

240

ASTM A106

A

330

205

 

B

415

240

C

485

275

●composition (%):

Standard

 Steel grade 

C

Si

Mn

P≤

S≤

Cu≤

Ni≤

Cr≤

Mo≤

V≤

GB/T 8162

10

0.07-0.14

0.17-0.37

0.35-0.65

0.035

0.035

0.25

0.25

0.15

/

/

20

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.25

0.25

0.25

/

/

35

0.32-0.39

0.17-0.37

0.50-0.80

0.035

0.035

0.25

0.25

0.25

/

/

45

0.42-0.50

0.17-0.37

0.50-0.80

0.035

0.035

0.25

0.30

0.25

/

/

16Mn

0.12-0.20

0.20-0.55

1.20-1.60

0.045

0.045

0.25

0.25

0.25

/

/

DIN 1629

St35

≤0.18

0.15-0.35

0.35-0.65

0.035

0.035

0.25

0.25

0.25

/

/

St45

≤0.25

0.15-0.35

0.50-0.80

0.035

0.035

0.25

0.25

0.25

/

/

St55

0.33-0.41

0.15-0.35

0.50-0.80

0.035

0.035

0.25

0.25

0.25

/

/

St52

≤0.20

≤0.55

≤1.50

0.035

0.035

0.25

0.25

0.25

/

/

ASTM A53

CK45

0.42-0.50

0.17-0.37

0.50-0.80

0.035

0.035

0.25

0.25

0.25

/

/

ASTM A106

A

≤0.25

/

≤0.95

0.05

0.045

0.40

0.40

0.40

0.15

0.08

B

≤0.30

/

&, amp;, amp;, amp;, amp;, lt;, /TD>

≤1.20,

0.05

0.06

0.40

0.40

0.40

0.15

0.08

A

≤0.25

≥0.10

0.27-0.93

0.035

0.035

0.40

0.40

0.40

0.15

0.08

B

≤0.30

≥0.10

0.29-1.06

0.035

0.035

0.40

0.40

0.40

0.15

0.08

C

≤0.35

≥0.10

0.29-1.06

0.035

0.035

0.40

0.40

0.40

0.15

0.08