Phosphated Precision Hydraulic Seambless Steel Pipe DIN EN
Precision Seambless Steel Pipe Specification
Production Introduction:
Shape: Round
Standard: EN10305-4 (DIN2445/2), EN10305-1 (DIN2391/C), GB/T3639, ASTM A179
Material: ST37.4,ST35,ST45,ST52,E235,E355
Salty spray test: ≥ 120hours
Size: Outside Diameter (OD): 4.0mm~80.0mm, Wall Thickness (WT): 0.5mm~8.0mm
Outside Diameter (OD) Standard Size: 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 15mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, 42mm,45mm, 50mm, 55mm, 60mm, 70mm, 80mm, 100mm
Length: Standard DIN EN Phosphated seamless steel pipe length is 6 meters or 5.8 meters. Other hydraulic tubes length dimensions also range from 2 to 12 meters. Also can Customizable length according to customer requirements.
Surface Treatment: Galvanized, phosphated, pickling or other processes.
Seamless Galvanized Steel Tubes: Standard zinc coating thickness is 8 to 12μm
Phosphating steel tubes: External Phosphating Coating
Sample: We can provide carbon seamless steel tubes samples for trial.
Chemical Composition of Seamless Precision Steel Pipe:
| Steel Grade | Chemical Composition% | ||||
| C | Si | Mn | P | S | |
| ST37.4/E235 | 0.07~0.13 | 0.17~0.37 | 0.35~0.65 | ≤0.035 | ≤0.035 |
| ST35 | 0.07~0.13 | 0.17~0.37 | 0.35~0.65 | ≤0.035 | ≤0.035 |
| ST45 | 0.17~0.23 | 0.17~0.37 | 0.35~0.65 | ≤0.035 | ≤0.035 |
| ST52/E355 | 0.13~0.19 | 0.20~0.60 | 1.20~1.60 | ≤0.030 | ≤0.030 |
Tolerance of Seamless Phosphated Steel Pipes:
| OD/mm | Tolerance/mm | ID/mm Tolerance/mm | Straightness/mm |
|---|---|---|---|
| 4~30 | ±0.08 | ±0.08~±0.15 | 0.1/1000 |
| 30~38 | ±0.15 | ±0.15~±0.20 | |
| 38~50 | ±0.20 | ±0.20~±0.25 | |
| 50~80 | ±0.25~±0.35 | ±0.25~±0.35 |
Mechanical Property of Carbon Seamless Steel Hydraulic Pipe:
| Steel Grade | Yield strength | Tensile Strength | Elongation |
| ReH | Rm | A | |
| min. | min. | min. | |
| MPa | MPa | % | |
| ST37.4/E235 | ≥235 | 340 to 480 | ≥25 |
| ST35 | ≥235 | 340 to 480 | ≥25 |
| ST45 | ≥255 | 410 to 520 | ≥25 |
| ST52/E355 | ≥355 | 490 to 630 | ≥22 |
Advantages of Precision Phosphated Steel Pipe:
Phosphating is to add a layer of phosphate film, that is, a phosphate compound layer, on the seamless steel hydraulic pipe.
The phosphate layer can be used as a primer for paint or coating. Phosphating can improve the adhesion of paint and coating, making the coating and paint more solid.
Improve the corrosion resistance of hydraulic pipe. In a humid environment, bright seamless steel pipes are prone to rust. Phosphating can prevent the surface of pipe from rusting easily.
Why Seamless Hydraulic Pipe is Cold Drawn or Cold Rolled?
The main purpose of cold drawing or cold rolling is to further improve the precision, strength and surface quality of seamless precision carbon steel hydraulic tubes through plastic deformation process.
Therefore, seamless galvanized steel tubes have higher dimensional accuracy, surface quality and mechanical properties.
Solid seamless precision steel tubes can be better used in hydraulic and pneumatic systems. As well as precision machinery and engineering machinery and other fields.
Application of Precision Seamless Steel Pipes
With advanced technology, seamless precision carbon steel tubes are designed to meet the stringent requirements of a wide range of industries. Superior strength, precision and durability make them a choice you can trust:
Hydraulic or pneumatic systems: Mainly used in pipelines and booms of construction machinery, agricultural machinery, and industrial equipment.
Automotive industry: As a key component in suspension systems, fuel lines and other precision engineering parts.
Industrial machinery: Provide powerful and precise solutions for fluid delivery and structural support.
Aerospace and defense: Meet stringent performance and safety standards in high-risk environments.
Machinery Boom
Hydraulic System Lines
Hydraulic or Pneumatic System
Package & Shipping
All EN1305-1, EN1305-4, DIN2391 cold drawn seamless precision steel pipes are carefully packed to provide maximum anti-collision protection to ensure their intact transportation.
The packaged seamless carbon steel precision hydraulic tubes are packed in wooden boxes or containers. It depends on the quantity of goods.
Packaging for Seamless Hydraulic Tubes
Wooden Box Package
Container Shipping
Factory of Carbon Seamless Steel Pipe
Our factory has more than fifteen years of export experience, has advanced production equipment, and has cooperated with customers in more than forty countries.
Seamless Steel Pipes Workshop
Seamless Precision Steel Tube Factory
Seamless Steel Hydraulic Pipes Factory
Contact Seamless Precision Steel Tubes Experts Directly!
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