E355 Seamless Carbon Steel Tube 25-426mm OD for Hydraulic Systems

Price Negotiable

Price: 800-1200USD/Ton

MOQ: 1Ton

Delivery Time: 20-30days upon products

Brand: TORICH

Product Description

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

Precision & Accuracy: Cold drawing ensures tight tolerances and fine surface finish—essential for hydraulic systems
Seamless Construction: Promotes higher strength and leak resistance under pressure
Versatile Delivery Conditions: +C gives highest strength; +N achieves balanced strength and ductility—common in hydraulic applications
Robust Performance: E235 balances cost and formability; E355 offers high strength for demanding, high-pressure conditions

Applicable Standards

EN 10305‑1: Covers seamless cold drawn precision tubes of circular cross-section
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

Hydraulic Cylinders: E235 for moderate pressure; E355 for heavy-duty/high-pressure systems (construction, mining, industrial presses).
Telescopic Arms & Shock Absorbers: Require smooth surfaces, tight tolerances, and high fatigue resistance—fulfilled by these cold-drawn grades.
General Engineering Components: Valves, steering systems, fuel injection, drive shafts, and transmission parts benefit from these materials’ precision and mechanical strength