For demanding hydraulic and pneumatic applications requiring exceptional precision and reliable performance, the EN 10305-1 E355 honed seamless steel tube represents a premium-grade solution. This product is manufactured in compliance with stringent European standards, guaranteeing superior mechanical properties and consistent quality. The critical honed internal surface is engineered to achieve minimal surface roughness, tight dimensional tolerances, and optimal roundness. These attributes are essential for enhancing system efficiency, extending service life, and reducing total cost of ownership by minimizing seal wear and fluid leakage. As an ideal material for high-performance hydraulic cylinders, servo cylinders, and precision engineering applications, our E355 honed tubing delivers the structural integrity and operational reliability required for critical systems.
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Products Description
EN 10305-1 E355 Honed Seamless Steel Tube
Standard: EN 10305-1, EN 10305-4
Materials:E355
Technical: cold-drawn seamless
Delivery Condition:BK.BKW,BK+S,GBK,NBK
Straightness: 0.5mm/1m max for tubes below 3m,0.8mm/1m max for tubes between 3 to 6m, 1.2mm/1m for tubes above 6m
Technology: honed & SRB(Skived and Roller Burnished).
Application: used in the hydraulic cylinder of the Heavy Machinery, Cranes, Excavator, and Forklifts. etc
Chemical Properties
| Carbon | Silicon | Manganese | Phosphorous | Sulphur | Molybdenum | Nickel | Chromium | Copper | Others |
|---|---|---|---|---|---|---|---|---|---|
| max 0.22 | max 0.55 | max 1.60 | 0.025 | 0.025 | – | – | – | – | – |
Mechanical Properties
| Yield Strength | Tensile Strength | Elongation A5 min | |||
|---|---|---|---|---|---|
| MPa min | ksi min | MPa min | MPa min | ksi min | Percentage |
| 490 | 630 | – | 22 | ||
Din En 10305-1 Material Pipe Size Chart
| 1/8 Inch IPS(.405 Inch Outer Diameter) | 3 1/2 Inch IPS( 4.000 Inch Outer Diameter) |
| 3/8 Inch IPS(.675 Inch Outer Diameter) | 5 Inch IPS( 5.563 Inch Outer Diameter) |
| Schedule 40, 80 | Schedule 10, 40, 80, 160, XXH |
| 1/4 Inch IPS(.540 Inch Outer Diameter) | 4 Inch IPS(4.500 Inch Outer Diameter) |
| Schedule 10, 40, 80 | Schedule 10, 40, 80, 160, XXH |
| Schedule 10, 40, 80, 160, XXH | Schedule-40 (.375) |
| Schedule 10, 40, 80 | Schedule 10, 40, 80, 160, XXH |
| 1/2 Inch IPS(.840 Inch Outer Diameter) | 6 Inch IPS(6.625 Inch Outer Diameter) |
| Schedule 5, 10, 40, 80, 160, XXH | Schedule 5, 10, 40, 80, 120, 160, XXH |
| 3/4 Inch IPS(1.050 Inch Outer Diameter) | 8 " IPS(8.625 Inch Outer Diameter) |
| Schedule 10, 40, 80, 160, XXH | Schedule 5, 10, 40, 80, 120, 160, XXH |
| 1 Inch IPS:(1.315′ Outer Diameter) | 10 Inch IPS(10.750 Inch Outer Diameter) |
| Schedule 5, 10, 40, 80, 160, XXH | Schedule 10, 20, 40, 80 (.500), TRUE 80(.500) |
| 2 Inch IPS(2.375 Inch Outer Diameter) | 16 Inch IPS(16.000 Inch Outer Diameter) |
| 1-1/4 Inch IPS(1.660 Inch Outer Diameter) | 12 Inch IPS(12.750 Inch Outer Diameter) |
| 1-1/2 Inch IPS(1.900 Inch Outer Diameter) | 14 Inch IPS(14.000 Inch Outer Diameter) |
| Schedule 10, 40, 80, 160, XXH | Schedule10 (.188), Schedule40 (.375) |
| Schedule 10, 40, 80, 160, XXH | Schedule 10, 20, 40(.375), TRUE40(.406), Schedule80(.500) |
| Schedule 10, 40, 80, 160, XXH | Schedule10(.188), Schedule40(.375) |
| 2 1/2 Inch IPS(2.875 Inch Outer Diameter) | 18 Inch IPS (18.000 Inch Outer Diameter) |
| 3 Inch IPS( 3.500 Inch Outer Diameter) | Schedule 5, 10, 40, 80, 160, XXH |
Equivalent of E355+sr Din En 10305-1 Tube
| Product | Deutsches Institut für Normung | European Standards | British Standards | National Futures Association | American Society for Testing and Material | American Society Of Mechanical Engineers |
|---|---|---|---|---|---|---|
| EN 10305-1 E235 | – | EN 10305-1 E235 | – | – | – | – |
| EN 10305-4 E355 | – | EN 10305-4 E355 | – | – | – | – |
| EN 10305-1 E355 | – | EN 10305-1 E355 | – | – | – | – |
| EN 10305-1 26Mn5 | DIN 26Mn5 | EN 10305-1 26Mn5 | – | ASTM SAE 1526 | – | – |
| EN 10305-1 E255 | – | EN 10305-1 E255 | – | – | – | – |
| EN 10305-1 C35E | DIN 17204 Ck35 | EN 10305-1 C35E | NFA A 35-552 XC 32 | ASTM A519 1035 | ASME SA 519 1035 | – |
| EN 10305-1 E41020V1 | – | EN 10305-1 E41020V1 | – | – | – | – |
| EN 10305-1 C45E | DIN 17204 Ck45 | EN 10305-1 C45E | – | ASTM A519 1045 | ASME SA 519 1045 | – |
| EN 10305-1 26Mo2 | – | EN 10305-1 26Mo2 | – | – | – | – |
| EN 10305-1 42CrMo4 | DIN 17204 42CrMo4 | EN 10305-1 42CrMo4 | NFA EN – 42CrMo4 | ASTM A 519 4142 | – | – |
| EN 10305-1 25CrMo4 | DIN 17200 25CrMo4 | EN 10305-1 25CrMo4 | NFA EN . 25CrMo4 | – | – | – |
| EN 10305-4 E235 | – | EN 10305-4 E235 | – | – | – | – |
| EN 10305-4 E215 | – | EN 10305-4 E215 | – | – | – |
E355 Welded Tube Size
| Wall Thickness | Outer Diameter Sizes in Inch |
|---|---|
| .010 | 1/16, 1/8, 3/16 |
| .020 | 1/16, 1/8, 3/16, 1/4, 5/16, 3/8 |
| .120 | 1/2, 5/8, 3/4, 7/8, 1, 1 1/4, 1 1/2, 2, 2 1/4, 2 1/2, 3 |
| .083 | 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1 1/4, 1 1/2, 1 5/8, 1 7/8, 2, 2 1/2,3 |
| .012 | 1/8 |
| .016 | 1/8, 3/16 |
| .028 | 1/8, 3/16, 1/4, 5/16, 3/8, 1/2, 3/4, 1, 1 1/2, 2 |
| .035 | 1/8, 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 16, 5/8, 3/4, 7/8, 1, 1 1/4, 1 1/2, 1 5/8, 2, 2 1/4 |
| .134 | 1 |
| .049 | 3/16, 1/4, 5/16, 3/8, 1/2, 16, 5/8, 3/4, 7/8, 1, 1 1/8, 1 1/4, 1 1/2, 1 5/8, 2, 2 1/4 |
| .065 | 1/4, 5/16, 3/8, 1/2, 16, 5/8, 3/4, 7/8, 1, 1 1/4, 1 1/2, 1 5/8, 1 3/4, 2, 2 1/2, 3 |
| .095 | 1/2, 5/8, 1, 1 1/4, 1 1/2, 2 |
| .109 | 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 |
| .250 | 3 |
| .125 | 3/4, 1, 1 1/4, 1 1/2, 2, 3, 3 1/4 |
| .375 | 3 1/2 |
E355 Steel Round Tube Dimension Tolerance
| Grade | Sizes | Outer Diameter Tolerance | Tolerance |
|---|---|---|---|
| Hot rolled | Outer Diameter – 80 Outer Diameter > 80 WT < 12 Wall = 12 | ± 0.4 ± 0.5 % of Outer Diameter | ± 0.7 ± (5 % x WT + 0.1 |
| Cold Worked, cold rolled and cold drawn | Outer Diameter < 40 Outer Diameter 40 - 80 Outer Diameter > 80 WT < 6 WT 6 = 8 WT > 8 | + 0.30/- 0 *+ 0.35/- 0 *+ 0.40/- 0 | ± 0.30 ± 0.35 ± 0.40 |
| Hot rolled peeled tube | All sizes WT < 12 Wall = 12 | + 0.25/- 0 mm | ± 0.8 ± (5 % x WT+ 0.2) |
Dimensional Length of E355 Steel Seamless Pipe
| Component length in MM | Outer Diameter 30 To 100 in MM | Outer Diameter 100 To 254 in MM |
| 10 To 100 | + 1.0/- 0 | + 2.0/- 0 |
| 1200 To 5000 | + 5.0/- 0 | + 6.0/- 0 |
| 600 To 1200 | + 3.0/- 0 | + 4.0/- 0 |
| 100 To 600 | + 2.0/- 0 | + 3.0/- 0 |
Specification chart of Acero E355 Seamless Tubes
| size in Mm | 5 To 1219.2 |
|---|---|
| Schedule | Schedule XS, Schedule 160, Schedule 40, Schedule XXS, Schedule 80 Supplier and Manufacturer |
| Standard | JIS, EN, DIN, GB, IS, AISI, ASME, ASTM |
| Seamless Pipe Size in MM | 4 to 219 Wall thickness: 0.5 to 20 |
| Welded Pipe Size in MM | 5 to 1219.2 |
| Seamless Tube Size in MM | 3.35 To 101.6 |
| Length | Double Random, Single Random, Standard & Cut length |
| Wall Thickness in inch | 0.020 to 0.220 |
| Type | U bent, Straight, Seamless, Round, Welded, EFW, Tube Coil, ERW, Hydraulic, LSAW, Square, Fabricated, Boiler, Rectangular |
| Finish | BA, Polished, AP, MF |
| Form | Square, Hydraulic, Rectangular, Clad, U bent, Boiler, Hollow, LSAW, Straight, Round, |
| End | Beveled, Plain, Treaded |
| Pipe Marking | All Pipes are marked as follows: Supplier or Manufacturer's Name, Standard, Grade, OD, Thickness, Length, Heat Number |
Inspection of Stahl E355 Tubing
| Optional | Flattening test or expansion test (option 20) | M | One per tested batch |
| Roughness measurement | Not applicable | One per tested batch | |
| NDT in order to identify longitudinal discontinuity | Not applicable | Individual | |
| NDT in order to identify leaks | |||
| Mandatory | Chemical analysis | M | M |
| Tensile testing | M | One per tested batch | |
| Dimension verification | M | M | |
| Visual inspection | M | M |
Inspection of Stahl E355 Tubing
| Inspection or test types | Test frequency | |
| Internal test | Acceptance test | |
| Dimension verification | M | M |
| Chemical analysis | M | M |
| NDT in order to identify leaks | Individual | Individual |
| Tensile testing | M | One per tested batch |
| Visual inspection | M | M |
| Flattening test or extension test | M | Two per tested batch |
Frequently Asked Questions: EN 10305-1 E355 Honed Seamless Steel Tube
Q1: What is the primary advantage of using honed tubing over standard cold-drawn seamless (CDS) tubing?
A: The primary advantage lies in the superior interior surface finish and dimensional precision. While standard CDS tubing is suitable for general applications, honed tubing undergoes an additional abrasive process that achieves a much smoother internal surface, tighter diameter tolerance, and improved roundness. This is critical for applications involving dynamic seals, as it significantly reduces friction, minimizes seal wear and fluid leakage, and enhances the overall efficiency and service life of hydraulic or pneumatic cylinders.
Q2: How does the E355 steel grade according to EN 10273-3 benefit performance in high-pressure applications?
A: The E355 grade, as defined by EN 10273-3, is a fine-grained, non-alloy quality steel with a specified minimum yield strength of 355 MPa. This enhanced mechanical strength provides exceptional pressure-bearing capacity and structural integrity. It offers a superior strength-to-weight ratio compared to lower grades like E235, allowing for the design of more compact, lighter, yet more powerful cylinders capable of withstanding higher operating pressures and dynamic loads.
Q3: What specific surface roughness (Ra) values can we expect with your honed tubes?
A: Our honing process is calibrated to achieve surface roughness values typically within a range of Ra ≤ 0.4 µm, with even finer finishes (e.g., Ra ≤ 0.2 µm) available for critical applications. We specify and guarantee these values on our material certifications to ensure they meet the stringent requirements of your component design.
Q4: Does your production process ensure consistent material properties throughout the tube length?
A: Absolutely. Consistency is a cornerstone of our quality assurance. We employ seamless manufacturing followed by a controlled honing process. This, combined with 100% ultrasonic testing and rigorous batch-wise mechanical testing, ensures uniform microstructure, hardness, and dimensional stability along the entire length of every tube we produce.
Q5: For a custom component, can you supply honed tubes with non-standard diameters and wall thicknesses?
A: Yes, we specialize in providing custom-sized honed tubing. Within the constraints of the initial hollows and our mill capabilities, we can produce tubes with outside diameters and wall thicknesses tailored to your specific design. Please consult with our technical sales team to discuss your precise requirements for OD, ID, and wall thickness tolerances.
Q6: What quality documentation and certifications accompany your shipments?
A: All shipments are accompanied by a fully traceable 3.1 Material Inspection Certificate as per EN 10204, which validates the chemical composition, mechanical properties, and results of all non-destructive tests. We also maintain full heat-code traceability from raw material to finished tube. Additional certifications, such as those for specific industry standards, can be discussed upon request.
Q7: What are the primary industries and applications for this product?
A: This premium tubing is engineered for demanding applications across various sectors, including:
Mobile Hydraulics: Cylinders for construction, agricultural, and mining equipment.
Industrial Machinery: Presses, plastic injection molding machines, and automation systems.
Aerospace & Defense: High-performance actuation systems.
Energy: Hydraulic systems for wind turbines and other power generation equipment.
Q8: How does using EN 10305-1 E355 honed tubing contribute to reducing the Total Cost of Ownership (TCO)?
A: While the initial investment may be higher than standard tubing, the Total Cost of Ownership is significantly reduced through:
Enhanced Reliability: Fewer failures and unplanned downtimes.
Extended Seal & Component Life: Reduced wear on expensive seals and other components.
Improved System Efficiency: Lower friction losses for energy savings.
Reduced Maintenance: Less frequent overhauls and fluid changes.
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