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EN 10305-1 E215 Honed Seamless Steel Tube

For applications demanding superior formability and consistent quality, the EN 10305-1 E215 Honed Seamless Steel Tube offers an exceptional balance of precision and performance. Manufactured to the rigorous EN 10305-1 standard, this cold-drawn seamless (CDS) tube guarantees tight dimensional tolerances on outer diameter and wall thickness. The E215 steel grade provides excellent ductility and weldability, making it ideally suited for complex forming operations. Combined with a ready-to-use honed internal surface that minimizes friction, it delivers reliable performance in hydraulic, pneumatic, and various mechanical applications.

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Tolerance

OD(mm)	ID(mm)	Tolerance
OD(mm)	ID(mm)	OD(mm)	ID(mm)	W.T(mm)
40-74	30-65	±0.01	-0.3-0.5	≤0.5
74-98	65-85	±0.01	-0.4-0.6	≤0.5
100-116	85-100	±0.02	-0.4-0.6	≤0.6
124-134	110-115	±0.02	-0.6-0.8	≤0.6
140-158	120-135	±0.02	-0.7-0.9	≤0.8
165-176	140-150	±0.02	-0.7-0.9	≤0.8
188-203	160-180	±0.02	-0.7-0.9	≤0.8

Honed

ID size	ID deviation(mm)
	H7	H8	H9	H10
30	+0.021 0	+0.033 0	+0.052 0	+0.084 0
>30-50	+0.025 0	+0.039 0	+0.062 0	+0.100 0
>50-80	+0.030 0	+0.046 0	+0.074 0	+0.120 0
>80-120	+0.035 0	+0.054 0	+0.087 0	+0.140 0
>120-180	+0.040 0	+0.063 0	+0.100 0	+0.160 0
>180-250	+0.046 0	+0.072 0	+0.115 0	+0.185 0
>250-315	+0.052 0	+0.081 0	+0.130 0	+0.210 0
>315-400	+0.057 0	+0.089 0	+0.140 0	+0.230 0

Standard Size

I.D(mm)	O.D(mm)	WT(mm)	I.D(mm)	O.D(mm)	WT(mm)	I.D(mm)	O.D(mm)	WT(mm)
40	50	5	90	100	5	140	156	8
40	52	6	90	105	7.5	140	160	10
40	55	7.5	90	110	10	140	165	12.5
40	58	9	90	114	12	140	168	14
50	60	5	95	105	5	140	170	10
50	65	7.5	95	110	7.5	140	180	20
50	70	10	100	110	5	150	170	10
60	70	5	100	115	7.5	150	175	12.5
60	72	6	100	120	10	150	180	15
60	75	7.5	100	125	12.5	160	180	10
60	80	10	100	127	13.5	160	185	12.5
63	73	5	100	130	15	160	190	10
63	75	6	110	125	7.5	160	200	20
63	76	6.5	110	130	10	170	190	10
63	78	7.5	110	140	15	170	195	12.5
63	80	8.5	115	130	7.5	170	200	15
63	83	10	115	135	10	180	200	10
70	80	5	120	135	7.5	180	205	12.5
70	82	6	120	140	10	180	210	15
70	85	7.5	120	145	12.5	180	220	20
70	90	10	120	150	15	200	220	10
75	85	5	125	140	7.5	200	225	12.5
75	90	7.5	125	145	12.5	200	230	15
75	95	10	125	150	12.5	200	235	17.5
80	90	5	125	152	13.5	200	245	22.5
80	92	6	125	155	15	220	250	15
80	95	7.5	125	160	17.5	220	270	25
80	100	10	130	145	7.5	220	273	26.5
80	102	11	130	150	10	240	270	15
80	105	12.5	130	160	15	250	290	20
80	110	15	135	160	12.5	250	299	24.5
Special requirement						230.5	254	11.75

Frequently Asked Questions (FAQ)

1. What is the main advantage of the E215 grade for cylinder manufacturing?
The primary advantage is its excellent weldability. E215's low carbon equivalent allows for easy welding without the need for complex pre- or post-heat procedures, making it ideal for welding cylinder barrels to end caps. Its high ductility also makes it perfect for applications requiring minor forming or flaring.

2. How does a honed finish benefit my hydraulic cylinder performance?
The honed internal surface creates an ideal bearing surface for piston seals. The cross-hatched pattern retains lubrication, while the smooth finish (low Ra value) significantly reuces friction and wear, leading to smoother operation, less leakage, and a longer service life for the entire cylinder.

3. Why should I choose a seamless tube over a cheaper welded alternative?
Seamless tubes have no longitudinal weld seam, which is a potential failure point under high cyclic pressure and fatigue. Choosing seamless construction ensures uniform strength and hardness around the entire circumference, providing greater reliability and safety for demanding applications.

4. What dimensional tolerances can I expect with EN 10305-1 tubes?
You can expect precision tolerances, typically to h9 for Outer Diameter and E3 for Wall Thickness, as defined by the standard. This high level of consistency ensures reliable sealing and simplifies the piston and gland design and assembly process.

5. Are these tubes suitable for chrome plating?
Yes, the homogeneous structure and smooth surface of the E215 honed tube make it an excellent substrate for chrome plating. It ensures good adhesion and a high-quality, durable finished surface.

6. Can you provide custom-cut lengths?
Absolutely. We specialize in providing value-added services. We can supply tubes in custom-cut lengths to your exact specifications, minimizing your waste and handling costs. We can also discuss non-standard diameters and wall thicknesses.

7. What certification do you provide with the material?
We provide full traceability and a EN 10204 3.1 Material Test Certificate with every shipment. This certificate independently verifies that the material's chemical composition and mechanical properties conform to the EN 10305-1 E215 standard.

8. How does EN 10305-1 E215 compare to DIN 2391 St34?
EN 10305-1 is the modern successor to DIN 2391. While the steel grades are similar, the EN standard typically enforces stricter and more comprehensive requirements for dimensional tolerances and testing, ensuring a higher and more consistent level of product quality and reliability.

9. Is the internal surface protected during shipping?
Yes. We understand the critical importance of the honed ID. All our honed tubes are thoroughly cleaned, oiled, and fitted with plastic end caps to prevent contamination and damage during transit and storage.

10. What is your lead time for this product?
We maintain a strategic stock of popular sizes to ensure quick turnaround. Lead times for custom orders vary based on quantity and specifications. Please contact our sales team for a precise lead time based on your requirements.

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