Din2391 St52 E355 Seamless Precision Steel Tube Suppliers
Carbon Seamless Precision Steel Tubes 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 tube 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: Galvanizing, phosphating, 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 Cold Drawn Seamless Precision Steel Tubes:
| 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 E355 Seamless Steel Tubes:
| 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 Pipes:
| 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 Hydraulic Steel Tubes:
DIN2391 Seamless carbon steel tube have higher compressive and tensile strength because they have no welds. Cold drawing or cold rolling processes give the pipes high dimensional accuracy. They are suitable for use in hydraulic and pneumatic systems.
St52 precision steel tube can be galvanized. In humid environments, corrosion resistance can be enhanced.
Phosphating: Add a phosphate film, i.e. a phosphate compound layer, to the seamless hydraulic tube. Phosphated tube can improve coating adhesion.
Why Seamless Precision Tubes 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 precision steel tubes have higher dimensional accuracy, surface quality and mechanical properties.
cold drawn 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
Seamless precision carbon steel tubes meet the stringent requirements of a wide range of industries. Their high strength, precise dimensions and durability make them a choice you can rely on:
Hydraulic or pneumatic systems: mainly used for pipes and booms in 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: provides powerful and precise solutions for fluid delivery and structural support.
Machinery Boom
Diesel Engine
Hydraulic or Pneumatic System
Package & Shipping of Seamless Hydraulic Steel Tubes
All EN1305-1, EN1305-4, DIN2391, st52, E355 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 Tubes
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 Precision Seamless Steel Tube Experts Directly!
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