30CrMnSiNi2A is a high-strength alloy steel widely used in the manufacturing of components that require excellent mechanical properties and resistance to fatigue.
30CrMnSiNi2A alloy steel is High strength, excellent ductility, toughness, fatigue resistance, and low crack growth rate after heat treatment.
The chemical composition of 16MnDG may vary slightly depending on the manufacturer or supplier. However, the following are the typical chemical composition ranges:
Component | C | Si | Mn | P | S | Cr | Ni | Cu* | Mo* | Ti* | W* | V* |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Minimum Value | 0.27 | 0.9 | 1 | - | - | 0.9 | 1.4 | - | - | - | - | - |
Maximum Value | 0.34 | 1.2 | 1.3 | 0.025 | 0.025 | 1.2 | 1.8 | 0.25 | 0.15 | 0.03 | 0.2 | 0.05 |
Tensile strength σb (MPa) | Elongation δ5 (%) | Reduction of ψ (%) | Impact toughness αku (J / cm2) | Sample size |
---|---|---|---|---|
1767 | 12 | 50 | 79 | bar |
1627 | 13 | 50 | 90 | bar |
The critical temperature of 30CrMnSiNi2A Steel
Critical Point | Ac1 | Ac3 | Ms |
---|---|---|---|
Temperature/℃ | 705 705 | 800 815 | 321 314 |
Elastic modulus of 30CrMnSiNi2A Steel
Temperature/℃ | 20 | 100 | 200 | 250 |
---|---|---|---|---|
Elastic modulus E/MPa | 211000 | 208000 | 204000 | 202000 |
Linear Expansion Coefficient of 30CrMnSiNi2A Steel
Temperature/℃ | 20 | 17~100 | 17~200 | 17~300 | 17~400 | 17~500 | 17~600 | 17~700 | 17~800 | 17~900 |
---|---|---|---|---|---|---|---|---|---|---|
Linear Expansion Coefficient /C | 10.55 | 11.37 | 11.67 | 12.68 | 12.9 | 13.55 | 13.8 | 13.9 | 11.15 | 12.1 |
Thermal conductivity of 30CrMnSiNi2A Steel
Temperature/℃ | 20 | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 |
---|---|---|---|---|---|---|---|---|---|---|
Thermal conductivity λ/W·(m·K) | 25.7 | 28.0 | 29.3 | 29.9 | 29.3 | 28.2 | 27.0 | 25.7 | 24.0 | 22.3 |
Mass constant pressure heat capacity of 30CrMnSiNi2A Steel
Temperature/℃ | 20 | 100 | 200 | 300 | 400 | 500 | 600 |
---|---|---|---|---|---|---|---|
Mass constant pressure heat capacity cp/J·(kg·K) | 472.3 | 526.6 | 518.0 | 639.5 | 698.0 | 752.4 | 831.8 |
1) 890 ~ 900 ℃ oil quenching, 200 ~ 300 ℃ tempering, air-cooled;
2) 890 ~ 900 ℃ heated, quenched into 210 ~ 280 ℃ nitrate bath isothermal 1h, air-cooled, and then at 200 ~ 300 ℃ tempering, air-cooled.
High hardenability. Machinability and weldability are good.
But sensitive to notch and hydrogen embrittlement (including environmental hydrogen embrittlement). 30CrMnSiNi2A is suitable for important stress-bearing structural components. Such as high-strength connectors and shaft parts.
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.
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