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16MnDG is a material in low-temperature resistant seamless pipes. It is also called 16MnDG low-temperature steel pipe. Its overall material is the prototype of 16Mn. The suffix letter DG means low temperature and high pressure, which means that it can be used in a low temperature environment of minus 40°C. Seamless steel pipes that can withstand high pressure.
The specifications of 16MnDG alloy steel pipe are generally 48-457mm in outer diameter and 3.5-45mm in wall thickness. Different specifications can be selected according to different applications.
GB/T18984 Seamless steel pipe for low temperature pipelines
Chemical composition of 16MnDG seamless steel pipe: carbon: 0.12~0.20, silicon: 0.20~0.55, manganese: 1.2~1.6, phosphorus ≤0.020, sulfur ≤0.010, 0.01~0.05 titanium element can be added
Product specifications: outer diameter 21mm-762mm, wall thickness 3.0mm~130mm
Production method: hot rolling, cold drawing, hot expansion, delivery status: normalizing
Chemical properties of 16MnDG Seamless Steel Pipe
| Standard | Grade | C | Si | Mn | P(max) | S | Ni | Mo | V |
| GB/T18984 | 16MnDG | 0.12-0.20 | 0.20-0.55 | 1.20-1.60 | 0.025 | 0.025 | – | – | – |
Longitudinal Mechanical Properties of GB/T18984 16MnDG Pipe
| Standard | Grade | Tensile strength | Lower yield strength(Rcl/Mpa) | Elongation | |
| Rm/Mpa | W.T.<=16mm | W.T.>16mm | A/% | ||
| GB/T18984 | 16MnDG | 490-665 | >=325 | >=315 | >=30 |
Minimum impact test temperature of GB/T18984 16MnDG Steel Pipe
|
Grade |
Minimum impact test temperature |
|
|
℉ |
℃ | |
|
16MnDG |
- |
-45 |
Low temperature alloy pipe
Precautions
When using 16MnDG seamless steel pipe, you need to pay attention to the following matters:
1. During transportation and storage, it is necessary to avoid damage such as collision and friction.
2. During use, excessive heating, excessive cooling, etc. need to be avoided to avoid affecting its performance.
3. During the welding process, attention needs to be paid to controlling the welding temperature and welding speed to avoid affecting its structural performance.
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