DIN 1629 Seamless Steel Pipe
Classification :
PRODUCT DETAILS
DIN 1629 Seamless Steel Pipe Description
DIN 1629 seamless steel pipe its main grades are St37.0, St44.0, St52.0, DIN 1629. Generally, the DIN 1629 standard is not limited to the working pressure value, and the working temperature is limited to below 300 ℃.
Product Parameters
Product Name | DIN 1629 Seamless Steel Pipe | |
Standard | EN/DIN/JIS/ASTM/BS/ASME/AISI etc. | |
Outer Diameter | Seamless: 1/4"-36" | Welding: 21.3mm-3620mm |
Round Tube: 1/2"-10" | Square Tube/Rectangular Tube: 15x15mm-400x600mm | |
Wall Thickness | Seamless: 1.25mm-50mm | Welding: 1.65mm-65mm |
Length | 3-12 meters, Support customization | |
Surface Process | Bright, Polished, Black | |
Other Services | Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc. | |
Chemical Composition
Grade | Materials No. | Deoxidation Yype | C | P | S | N¹) |
St37 | 1.0254 | R | 0.17 | 0.040 | 0.040 | 0.009 ²) |
St44 | 1.0255 | R | 0.21 | 0.040 | 0.040 | 0.009 ²) |
St52 | 1.0421 | RR | 0.22 | 0.040 | 0.035 | - |
Mechanical Properties
DIN 1629 | Yield Strength(Wall Thickness/mm) | Tensile Strength N/² mm | Elongation(%) A5 | ||||
Grade | Material No. | <16 | 16-40 | 40-65 | Vertical | Transverse | |
St37 | 1.0254 | 235 | 225 | 216 | 350²) to 480 | 25 | 23 |
St44 | 1.0256 | 275 | 265 ¹) | 255 ¹) | 420²) to 550 | 21 | 19 |
St52 | 1.0421 | 355 | 345 | 335 | 500²) to 650 | 21 | 19 |
Scope of Application
Seamless steel pipe applications are: chemical plants, vessels, pipeline engineering and general mechanical engineering.
Factory Appearance

| USA | Japan | Germany | U.K. |
|
France | Italy | Spain | Switzerland | China | |
|
AISI/SAE |
JIS |
W‐nr. |
DIN |
BS |
EN |
AFNOR |
UNI |
UNE |
SS |
GB |
|
A570.36 |
STKM 12A |
1.0038 |
RSt.37‐2 |
4360 |
‐ |
E 24‐2 |
‐ |
‐ |
1311 |
15 |
|
- |
STKM 12C |
- |
- |
40 C |
- |
Ne |
- |
- |
- |
- |
|
1015 |
‐ |
1.0401 |
C15 |
080M15 |
‐ |
CC12 |
C15, C16 |
F.111 |
1350 |
15 |
|
1020 |
‐ |
1.0402 |
C22 |
050A20 |
2C |
CC20 |
C20, C21 |
F.112 |
1450 |
20 |
|
1213 |
SUM22 |
1.0715 |
9SMn28 |
230M07 |
1A |
S250 |
CF9SMn28 |
F.2111 |
1912 |
Y15 |
|
11SMn28 |
||||||||||
|
12L13 |
SUM22L |
1.0718 |
9SMnPb28 |
‐ |
‐ |
S250Pb |
CF9SMnPb28 |
11SMnPb28 |
1914 |
‐ |
|
‐ |
‐ |
1.0722 |
10SPb20 |
‐ |
‐ |
10PbF2 |
CF10Pb20 |
10SPb20 |
‐ |
‐ |
|
1215 |
‐ |
1.0736 |
9SMn36 |
240M07 |
1B |
S300 |
CF9SMn36 |
12SMn35 |
‐ |
Y13 |
|
12L14 |
‐ |
1.0737 |
9SMnPb36 |
‐ |
‐ |
S300PB |
CF9SMnPb36 |
12SMnP35 |
1926 |
‐ |
|
1015 |
S15C |
1.1141 |
Ck15 |
080M15 |
32C |
XC12 |
C16 |
C15K |
1370 |
15 |
|
1025 |
S25C |
1.1158 |
Ck25 |
‐ |
‐ |
‐ |
‐ |
‐ |
‐ |
25 |
|
A572-60 |
‐ |
1.890 |
StE380 |
4360 55 |
‐ |
‐ |
FeE390KG |
‐ |
2145 |
‐ |
|
1035 |
‐ |
1.0501 |
C35 |
060A35 |
‐ |
CC35 |
C35 |
F.113 |
1550 |
35 |
|
1045 |
‐ |
1.0503 |
C45 |
080M46 |
‐ |
CC45 |
C45 |
F.114 |
1650 |
45 |
|
1140 |
‐ |
1.0726 |
35S20 |
212M36 |
8M |
35MF4 |
‐ |
F210G |
1957 |
‐ |
|
1039 |
‐ |
1.1157 |
40Mn4 |
150M36 |
15 |
35M5 |
‐ |
‐ |
‐ |
40Mn |
|
1335 |
SMn438(H) |
1.1167 |
36Mn5 |
‐ |
‐ |
40M5 |
‐ |
36Mn5 |
2120 |
35Mn2 |
|
1330 |
SCMn1 |
1.1170 |
28Mn6 |
150M28 |
14A |
20M5 |
C28Mn |
‐ |
‐ |
30Mn |
|
1035 |
S35C |
1.1183 |
Cf35 |
060A35 |
‐ |
XC38TS |
C36 |
‐ |
1572 |
35Mn |
|
1045 |
S45C |
1.1191 |
Ck45 |
080M46 |
‐ |
XC42 |
C45 |
C45K |
1672 |
Ck45 |
|
1050 |
S50C |
1.1213 |
Cf53 |
060A52 |
‐ |
XC48TS |
C53 |
‐ |
1674 |
50 |
|
1055 |
‐ |
1.0535 |
C55 |
070M55 |
9 |
‐ |
C55 |
‐ |
1655 |
55 |
|
1060 |
‐ |
1.0601 |
C60 |
080A62 |
43D |
CC55 |
C60 |
‐ |
‐ |
60 |
|
1055 |
S55C |
1.1203 |
Ck55 |
070M55 |
‐ |
XC55 |
C50 |
C55K |
‐ |
55 |
|
1060 |
S58C |
1.1221 |
Ck60 |
080A62 |
43D |
XC60 |
C60 |
‐ |
1678 |
60Mn |
|
1095 |
‐ |
1.1274 |
Ck101 |
060A96 |
‐ |
XC100 |
‐ |
F.5117 |
1870 |
‐ |
|
W1 |
SK3 |
1.1545 |
C105W1 |
BW1A |
‐ |
Y105 |
C36KU |
F.5118 |
1880 |
‐ |
|
W210 |
SUP4 |
1.1545 |
C105W1 |
BW2 |
‐ |
Y120 |
C120KU |
F.515 |
2900 |
‐ |
Packing and delivery
In addition to independent production, the company has also signed annual sales contracts with major steel mills. The company has sufficient inventory and complete variety specifications.

Customer Visit
Adhering to the philosophy of "Excellence in Quality, Service First", the company has established long-term and stable partnerships with many Fortune 500 companies. Through strategic resource coordination and customized services, we help our partners enhance their market competitiveness.
Customer Praise
With an annual sales volume of over 3000,000 tons, the company mainly deals in stainless steel plates, coils, pipes, bars and nickel-based alloys. With a professional foreign trade team, our products are exported to more than 50 countries and regions worldwide, including the United States, Germany and India.
APPLICATION FIELD
Construction machinery manufacturing field
Intelligent manufacturing field
Energy Industry
Electronic Information Field
Precision Instruments
Energy storage sector
FACTORY WORKSHOP
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