In the hydraulic field, E355 seamless cold drawn tubes are usually used for material of cylinder barrel, and also used for the production of Honed Tubes and Skived & Roller Burnished Tubes.,It’s also widely used in hydraulic system with precision steel tube, hydraulic press with precision steel tube, shipbuilding with steel tube, hydraulic machinery,hydraulic cutting machine, hydraulic equipment, hydraulic tubing, engineering machinery.Cold Drawn Seamless Tube/CDS Tube/Pre-Honed Tube/Ready to Honed Tube/
Description Of E355 Seamless Cold Drawn Tubes
Material: E215，E235 ,E355 ，ST52
Delivery Condition: BK, BK+S, GBK, NBK
ID Size : 10mm – 1000mm，Length: max 16m
Type: Seamless, Hot Rolled, Cold Rolled, Cold Drawn
Straightness: ≤ 0.5/1000
Roughness: 0.2-0.4 u
Tolerance EXT: DIN2391, EN10305, GB/T 1619
Chemical Composition
| Steel Grade | Chemical Components (%) | ||||||
| Steel Name | Steel Number | C
max. | Si
max. | Mn
max. | P
max. | S
max. | AL
min. |
| E235 | 1.0308 | 0.17 | 0.35 | 1.2 | 0.025 | 0.025 | / |
| E355 | 1.058 | 0.22 | 0.55 | 1.6 | 0.025 | 0.025 | / |
1. Unmatched Strength & Durability
Material Superiority: E355 alloy steel (C-Mn-Si composition) ensures ≥355 MPa yield strength, ideal for load-bearing structures.
Cold Drawing Process: Enhanced grain structure improves hardness by 20% vs. hot-finished tubes.
2. Precision Engineering
Tolerance Control: ID/OD tolerance ±0.1mm, straightness ≤0.5 mm/m, perfect for hydraulic cylinders and machinery.
Surface Finish: Smooth surface (Ra ≤0.8μm) reduces friction and extends component lifespan.
3. Corrosion Resistance
Custom Coatings: Optional galvanizing, epoxy coating, or phosphating for harsh environments (marine, chemical plants).
4. Fast & Flexible Supply
Stock Availability: Common sizes (10mm–250mm OD, 1mm–20mm WT) ready for immediate dispatch.
Customization: Cut-to-length, threading, flaring, and marking within 7–15 days.
Q1: What makes E355 tubes better than standard S355?
A: E355 has stricter impurity control (lower P, S content) for welding stability.
Q2: Can I order small quantities for prototyping?
A: Yes! MOQ starts at 100kg for R&D projects.
Q3: How do you ensure dimensional accuracy?
A: Every batch undergoes laser measurement and 3D CMM inspection.
Q4: What’s the lead time for custom sizes?
A: 7–10 days for cutting/coating, 15 days for special diameters.
