Seamless steel pipe

Seamless steel pipe
 

Product description:

Structure with a seamless series
standard
GB / T8162-2008, ISO2937, ASTM A53, ASTM A192, ASTM A106.
JIS G 3441, BS EN 10210-1, DIN 1629-1984, ISO 559: 1991.
use:
Including the use for general structural and mechanical structure, a large variety of structural pipe for construction, machinery, transportation, aviation, oil exploration and other industries
Dimensional tolerances

standard
Diameter tolerance
` Walled 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
335-475
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

chemical composition (%) :

standard
Trademark
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