EN10305 Precision Seamless Steel Tube usually used for the production of cylinder honed barrel, The honed tube is a tool used to grind, trim or finish the hole in the cylinder. It can accurately remove unevenness, oxidation layer or other impurities on the inner surface of the cylinder to improve the accuracy and surface quality of the cylinder. Through the use of honing pipe, the inner hole of the cylinder can reach the specific size, shape and finish requirements
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 EN10305 Precision Seamless Steel Tube
Material: E355 ，EN10305
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
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.
