16MnDG is a type of Chinese steel that is used for pressure vessels and boilers.
16MnDG is made up of a combination of 16% manganese, 0.8% -1.6% silicon, 0.60% - 0.90% carbon, 0.035% phosphorus, 0.035% sulfur, and less than 0.25% of other elements. The "DG" in the name stands for "low temperature impact resistance," indicating that this steel has been specifically designed to withstand impact at low temperatures.
The chemical composition of 16MnDG may vary slightly depending on the manufacturer or supplier. However, the following are the typical chemical composition ranges:
| Element | Content Range |
|---|---|
| Carbon (C) | 0.14%-0.20% |
| Silicon (Si) | 0.20%-0.55% |
| Manganese (Mn) | 1.20%-1.60% |
| Phosphorus (P) | ≤0.025% |
| Sulfur (S) | ≤0.015% |
| Chromium (Cr) | ≤0.30% |
| Nickel (Ni) | ≤0.30% |
| Copper (Cu) | ≤0.30% |
| Titanium (Ti) | ≤0.20% |
| Vanadium (V) | ≤0.10% |
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 121 (≥) | 234 (≥) | 41 | 42 | 33 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 414 |
Physical properties of GB 16MnDG GB/T 18984 mainly cover modulus of elasticity, coefficient of thermal expansion, thermal conductivity, specific thermal capacity, electrical resistance value, density, poisson's ratio, etc.
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson's coefficient, ν |
|---|---|---|---|---|---|---|---|
| 31 | - | - | 0.24 | - | |||
| 468 | 231 | - | 13.3 | 131 | - | ||
| 623 | - | 12 | 12.2 | 331 | 432 |
Note that the exact composition of 16MnDG may vary depending on the specific requirements or standards of the application. It is important to consult the manufacturer or supplier for detailed information about the chemical composition, mechanical properties, and other specifications of this material.
16MnDG steel pipe is a low-temperature steel pipe. 16MnDG steel pipe is suitable for -45℃～195℃ low-temperature pressure vessel pipes and low-temperature heat exchanger pipes. 16MnDG steel pipe has good comprehensive mechanical properties and process properties. The content of phosphorus is slightly lower than that of common 16Mn steel. In addition to the requirement of higher tensile strength and elongation than common 16Mn steel, impact toughness is also required.
GB/T 18984 stipulates the classification, code, order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking, and quality certificate of seamless steel pipes for low-temperature pipelines. GB/T 18984 is applicable to seamless steel pipes for low-temperature pressure vessel pipes and low-temperature heat exchanger pipes with a working temperature ranging from -45°C to -196°C.
| Grade | Standard | Area | Content |
|---|---|---|---|
| 09Mn2VDG | GB/T 18984 | China | Seamless steel pipe for low temperature pipeline |
| 06Ni3MoDG | GB/T 18984 | China | Seamless steel pipe for low temperature pipeline |
| 16MnDG | GB/T 18984 | China | Seamless steel pipe for low temperature pipeline |
| 10MnDG | GB/T 18984 | China | Seamless steel pipe for low temperature pipeline |
| 09DG | GB/T 18984 | China | Seamless steel pipe for low temperature pipeline |
The tubes shall be manufactured by the seamless process and shall be either hot-finished or cold-finished as specified.
All seamless tubes shall be treated to control their microstructure in accordance with one of the following methods:
Chemical composition analysis, tension test, flattening test, flaring test, hardness test, impact test, NDT, surface inspection, and dimension check.
5800mm; 6000mm; 6096mm; 7315mm; 11800mm; and so on.
Maximum length: 30000mm. Also, U bending can be provided.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
