E355 Seamless Carbon Steel Tube 25-426mm OD for Hydraulic Systems
Product Details
seamless carbon steel tube
,hydraulic system steel tube
,precision steel tube with warranty
E215, E235 & E355 Seamless Precision Cold-Drawn Carbon Steel Tubes for Hydraulic Systems
Material Overview
E215, E235, and E355 are carbon steel grades specified under the EN 10305‑1 (Precision Seamless Cold Drawn Tubes) and extended in EN 10305‑4 (Hydraulic/Pneumatic Systems) standards These steel grades are intended for high-precision, seamless steel tubes commonly used in hydraulic and pneumatic power systems.
Chemical Composition
| Steel Grade | C (max) | Si (max) | Mn (max) | P (max) | S (max) | Al (min) |
|---|---|---|---|---|---|---|
| E215 | 0.10% | 0.05% | 0.70% | 0.025% | 0.025% | 0.025% |
| E235 | 0.17% | 0.35% | 1.20% | 0.025% | 0.025% | – |
| E355 | 0.22% | 0.55% | 1.60% | 0.025% | 0.025% | – |
Mechanical Properties by Delivery Condition
| Grade | Delivery Condition | Tensile Strength Rm (MPa) | Yield Strength ReH (MPa) | Elongation A (%) |
|---|---|---|---|---|
| E215 | +C | ≥ 430 | – | ≥ 8 |
| +LC | ≥ 380 | – | ≥ 12 | |
| +SR | ≥ 380 | ≥ 280 | ≥ 16 | |
| +A | ≥ 280 | – | ≥ 30 | |
| +N | 290–430 | ≥ 215 | ≥ 30 | |
| E235 | +C | ≥ 480 | – | ≥ 6 |
| +LC | ≥ 420 | – | ≥ 10 | |
| +SR | ≥ 420 | ≥ 350 | ≥ 16 | |
| +A | ≥ 315 | – | ≥ 25 | |
| +N | 340–480 | ≥ 235 | ≥ 25 | |
| E355 | +C | ≥ 640 | – | ≥ 4 |
| +LC | ≥ 580 | – | ≥ 7 | |
| +SR | ≥ 580 | ≥ 450 | ≥ 10 | |
| +A | ≥ 450 | – | ≥ 22 | |
| +N | 490–630 | ≥ 355 | ≥ 22 |
Main Characteristics & Advantages
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Precision & Accuracy: Cold drawing ensures tight tolerances and fine surface finish—essential for hydraulic systems
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Seamless Construction: Promotes higher strength and leak resistance under pressure
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Versatile Delivery Conditions: +C gives highest strength; +N achieves balanced strength and ductility—common in hydraulic applications
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Robust Performance: E235 balances cost and formability; E355 offers high strength for demanding, high-pressure conditions
Applicable Standards
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EN 10305‑1: Covers seamless cold drawn precision tubes of circular cross-section
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EN 10305‑4: Tailored to seamless cold drawn tubes for hydraulic and pneumatic systems, focusing on application-specific composition and properties
Application Areas
General Use
These tubes are highly suited for hydraulic system components—cylinders, pistons, shock absorbers, telescopic arms, and other high-precision machinery
Specific Examples
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Hydraulic Cylinders: E235 for moderate pressure; E355 for heavy-duty/high-pressure systems (construction, mining, industrial presses).
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Telescopic Arms & Shock Absorbers: Require smooth surfaces, tight tolerances, and high fatigue resistance—fulfilled by these cold-drawn grades.
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General Engineering Components: Valves, steering systems, fuel injection, drive shafts, and transmission parts benefit from these materials’ precision and mechanical strength
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,
it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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