DIN 1630 ST37.4 ST44.4 ST52.4 High Performance Tube Non-alloy Precision Steel Tube For Hydraulic Cylinder
Introduction
DIN 1630 is a standard that specifies the requirements for non-alloy precision steel tubes used in hydraulic cylinders. The tubes are designed to withstand high pressure and provide excellent performance in various applications. This article discusses the material specifications, key features, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades of these high-performance tubes.
Material
The DIN 1630 standard covers non-alloy precision steel tubes, specifically designed for hydraulic applications. The materials used in these tubes are characterized by their high strength, durability, and resistance to deformation under pressure.
Specification
The specifications for DIN 1630 tubes include dimensions, tolerances, and surface quality. These tubes are typically produced in various diameters and wall thicknesses to meet specific application requirements.
Key Features
- High Strength: Designed to withstand high pressure and mechanical stress.
- Precision Manufacturing: Tight tolerances ensure a perfect fit in hydraulic systems.
- Corrosion Resistance: Suitable for various environments, enhancing longevity.
- Versatile Applications: Ideal for hydraulic cylinders in diverse industries.
Chemical Composition
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) |
| ST37.4 | 0.17 | 0.15 | 1.20 | 0.045 | 0.045 | - | - | - |
| ST44.4 | 0.20 | 0.15 | 1.40 | 0.045 | 0.045 | - | - | - |
| ST52.4 | 0.22 | 0.15 | 1.60 | 0.045 | 0.045 | 0.30 | 0.30 | 0.10 |
Mechanical Properties
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
| ST37.4 | 235 | 360-510 | 26 | 120-160 |
| ST44.4 | 275 | 430-580 | 24 | 140-180 |
| ST52.4 | 355 | 490-630 | 22 | 160-200 |
Steel Grade
The primary steel grades covered under DIN 1630 are:
- ST37.4: Suitable for general applications with moderate strength requirements.
- ST44.4: Offers higher strength and is used in more demanding applications.
- ST52.4: Provides the highest strength and is ideal for high-pressure hydraulic systems.
Application
DIN 1630 precision steel tubes are widely used in:
- Hydraulic cylinders
- Automotive applications
- Construction machinery
- Industrial equipment
- Agricultural machinery
Possible Alternative Grades
While DIN 1630 grades are widely used, there are alternative grades that may be considered based on specific requirements:
- EN 10210: Structural hollow sections of non-alloy and fine grain steels.
- EN 10219: Cold formed welded and seamless structural tubes.
- ASTM A513: Electric-resistance-welded carbon steel tubing.
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