DIN 1629 Seamless Steel pipe of Non Alloys Steels are made of unalloyed steels, it's main grades are St 37.0, St44.0, St52.0, Din 1629 seamless steel pipes application fields are: chemical plant, vessels, pipework construction and for common mechanical engineering purposes. Normally DIN 1629 standard are manufactured with no limiting working pressure values. Working temperature is limited below 300℃.
Chemical composition:
| Steel Grade |
Type of deoxidization (R, killed (including semi-killed)) (RR,fully killed) |
Chemical Composition, % by mass | |||||
| Symbol | Material Number | C | P | S | N¹) |
Addition of nitrogen fixing elements (e.g.not less than 0,020% Al total |
|
| St37.0 | 1.0254 | R | 0.17 | 0.040 | 0.040 | 0.009²) | - |
| St44.0 | 1.0255 | R | 0.21 | 0.040 | 0.040 | 0.009²) | - |
| St52.0³) | 1.0421 | RR | 0.22 | 0.040 | 0.035 | - | Yes |
Mechanical properties:
| Steel Grade |
Upper Yield Stress ReH for wall thickness, in mm, |
Tensile strength Rm N/mm² |
Elongation(%) A5 | ||||
| Symbol | Material Number | up to 16 | over 16 up to 40 | over 40 up to 65 | Longitudinal | Transverse | |
| St 37.0 | 1.0254 | 235 | 225 | 216 | 350²) to 480 | 25 | 23 |
| St 44.0 | 1.0256 | 275¹) | 265¹) | 255¹) | 420²) to 550 | 21 | 19 |
| St 52.0 | 1.0421 | 355 | 345 | 335 | 500²) to 650 | 21 | 19 |
What are the application areas of DIN 1629 seamless steel pipe?
1. Chemical industry: It can be used in the construction of various pipelines in chemical plants to transport various chemical media. It has certain strength and corrosion resistance, can work stably in the chemical production environment, and ensure the smooth progress of the production process.
2. Container manufacturing: Commonly used to manufacture various types of containers, such as tanks for storing liquids or gases. The material properties of DIN 1629 seamless steel pipes can meet the container's requirements for strength and sealing, ensuring that the container will not easily leak during use.
3. Pipeline engineering: suitable for general pipeline system construction, such as industrial pipelines, building water supply and drainage pipelines, etc. It can withstand a certain pressure and has good wear resistance, which can ensure the reliability of the pipeline during long-term use.
4. Mechanical Manufacturing: It is widely used in general mechanical engineering. It can be used as a mechanical structural part. It can also be used to manufacture some mechanical parts that have certain requirements on strength and toughness, such as hydraulic cylinders, etc., to provide stable support and connection for mechanical devices.
