DIN 2448 ST37 ST44 ST52 Cold Drawn Seamless Tubing
Seamless Steel Pipes and Tubes for Mechanical Manufacturing
DIN 2448 is a standard that specifies the requirements for seamless steel pipes and tubes used in mechanical manufacturing. The standard covers various grades, including ST37, ST44, and ST52, which are commonly used in engineering applications due to their excellent mechanical properties and versatility.
Material and Specification
The seamless tubes and pipes under DIN 2448 are primarily made from carbon steel. The specifications ensure that the products meet the necessary mechanical and chemical properties for various applications.
Key Features
- Seamless Construction: Provides higher strength and durability compared to welded pipes.
- Cold Drawn: Enhances dimensional accuracy and surface finish.
- Versatile Applications: Suitable for various mechanical engineering applications.
Chemical Composition
The following table presents the typical chemical composition for the steel grades ST37, ST44, and ST52 as per DIN 2448:
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) |
| ST37 | 0.10 | 0.15 | 0.60 | 0.04 | 0.05 | 0.25 | 0.25 | 0.10 |
| ST44 | 0.20 | 0.15 | 0.80 | 0.04 | 0.05 | 0.25 | 0.25 | 0.10 |
| ST52 | 0.22 | 0.15 | 1.20 | 0.04 | 0.05 | 0.25 | 0.25 | 0.10 |
Mechanical Properties
The mechanical properties of the steel grades ST37, ST44, and ST52 are summarized in the following table:
| Steel Grade | Yield Strength (N/mm²) | Tensile Strength (N/mm²) | Elongation (%) | Hardness (HB) |
| ST37 | 235 | 360-510 | 26 | 120-160 |
| ST44 | 275 | 410-550 | 24 | 130-170 |
| ST52 | 355 | 490-630 | 22 | 140-180 |
Steel Grade
- ST37: Low carbon steel, suitable for general engineering applications.
- ST44: Medium carbon steel, used for structural applications requiring higher strength.
- ST52: High carbon steel, ideal for heavy-duty applications and high-stress environments.
Application
The seamless tubes and pipes conforming to DIN 2448 are widely used in various industries, including:
- Automotive: For manufacturing components such as axles and frames.
- Construction: In structural applications and scaffolding.
- Machinery: For hydraulic and pneumatic systems.
- Oil and Gas: In pipelines and drilling equipment.
Possible Alternative Grades
In addition to ST37, ST44, and ST52, other grades that may be considered as alternatives include:
- S235: A European standard grade with similar properties to ST37.
- S355: A higher strength grade comparable to ST52.
- A106: An American standard for seamless carbon steel pipes.
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