The DIN 1629 standard includes 3 basic steel grades (ST37, ST44, ST52). The standard specifies non-alloy steel seamless round pipes used in chemical plants, pressure vessels, piping systems, and general mechanical and engineering purposes.
ST37 hydraulic steel pipe has no oxide layer on the inner and outer walls, can withstand high pressure without leakage, is cold-bent without deformation, and has no cracks when expanded or flattened. ST52 alloy pipe is usually made by cold drawing or hot rolling. It can also withstand high pressure and is not easy to leak. And maintain stable performance during processing.
ST37 ST52 ST42 seamless pipes are used to manufacture key components in hydraulic systems, such as cylinders, oil cylinders, etc. In the fields of engineering machinery, petrochemical industry, metallurgy, aerospace and other fields.
Product Specifications for ST37 ST52 ST42 Hydraulic Steel Tube
| Product Name | St37 St42 St52 Carbon Seamless Steel Pipe |
| Thickness | SCH 40, SCH 80, SCH 160, All Schedules |
| Surface Treatment | Black Painting, Anti-Corrosion Oil, Galvanized, As Requirements |
| Available Form | Round Pipe/Tubes, Square Pipe/Tubes, Coiled Tubes, "U" Shape, etc. |
| End Protector | Plastic Caps |
| End Connections | Plain, Bevel, Screwed, Threaded |
Chemical composition of st37 st42 st52 alloy seamless steel pipe
| Chemical Composition(%) | |||||
| Steel Grade | C | Si | Mn | P | S |
|
St37 |
≤0.17 | - | - | ≤0.035 | ≤0.035 |
| St44 | ≤0.21 | - | - | ≤0.035 | ≤0.035 |
| St52.0 | ≤0.22 | ≤0.55 | ≤1.60 | ≤0.035 | ≤0.035 |
Mechanical properties of St37 St42 St52 Carbon Seamless Steel Pipe
| Mechanical Properties | ||||
| Steel Grade | Tensile strength(Mpa) | Yield point(Mpa) | Elongation(%)L | Elongation(%)T |
| St37 | 350-480 | ≥235 | ≥25 | ≥23 |
| St44 | 420-550 | ≥275 | ≥21 | ≥19 |
| St52.0 | 500-650 | ≥355 | ≥21 | ≥19 |
Carbon Seamless Steel Pipe
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