Structure Steel Seamless Pipe

3 125

Structure Steel Seamless Pipe

● Standard

GB/T8162-2008, ISO2937, ASTM A53, ASTM A106, JIS G 3441, BS EN 10210-1

● Uses:

The scope of use includes general structural and mechanical structures, and a large number of structural tubes used in construction, machinery, transportation, aviation, petroleum exploration and other industries.

● Dimensional tolerance

standard

Outer diameter tolerance

Thick wall tolerances`

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

Seamless steel pipe for structural use Domestic main materials are 10#, 20#, 35#, 45#, 16Mn, 27SiMn 

● Mechanical properties

standard

Steel grade

Tensile strength (MPa)

Yield strength (MPa)

Elongation rate

<16mm

16-30mm

GB/T 8162

10

335

205

195

twenty four

20

390

245

235

20

35

510

305

295

17

45

590

335

325

14

16Mn

490

325

315

twenty one

DIN 1629

 

<16mm

>16mm

 

ST35

345-460

235

225

25

ST45

440-550

255

245

twenty one

ST55

540-645

295

285

17

ST52

490-630

355

345

twenty two

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


● Chemical composition (%):

standard 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 / ≤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

Key words: structural pipe , seamless steel pipe for structure , 20# seamless steel pipe , 45# seamless steel pipe , 27SiMn seamless steel pipe
 
 
 
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