E355 Honed Tube Sizes Chart

E355 honed tube is the EN 10305-1:2016 precision seamless tube (material number 1.0580) finished with a smooth, cross-hatched bore for hydraulic and pneumatic cylinder barrels. This chart collects the numbers a buyer actually needs to size an order: the bore tolerance classes (H7/H8/H9/H10), wall-thickness and outside-diameter tolerances, mechanical properties by delivery condition, and a standard cylinder-barrel size schedule. E355 is the current EN designation of the same steel historically called ST 52-3.
 

Grade identity & standard

E355 is a carbon-manganese precision steel defined by EN 10305-1:2016 (Steel tubes for precision applications — Part 1: Seamless cold drawn tubes). Its material number is 1.0580. In the honed-tube trade it is the same steel as the legacy German grade ST 52-3 / St 52 and the structural grade S355; only the standard family and the delivery condition change, not the chemistry. When you order "E355 honed tube" you are ordering a cold-drawn seamless tube whose bore — not its outer diameter — is the controlled, finished dimension.
 

Supply range

The figures below are the practical ordering envelope. The first column is the EN 10305-1 scope; the others are the commercial envelope most mills and traders actually quote.

Dimension	EN 10305-1:2016 scope	Typical commercial range	Notes
Outside diameter (OD)	≤ 380 mm	30–450 mm (some mills to 500+)	Above 380 mm, the certificate basis shifts to EN 10297-1
Bore (ID)	— (set by OD & wall)	30–500 mm (1.5–20 in imperial)	Bore is the finished, tolerance-controlled surface
Wall thickness	0.5–25 mm typical	4–50 mm for honed barrels	Thin walls (≤ 4 mm) need a fixed absolute tolerance
Length	random / exact per order	up to 12 m, cut to length	Standard random length 6 m

 

Bore (ID) tolerance — H7, H8, H9, H10

The bore is finished to ISO 286-2 hole (H) classes. Every class is specified as +tolerance / 0: the bore is never undersize, which protects the sealing surface. H8 is the default for cylinder barrels; H7 is for precision guide bores, H9/H10 for bores that are machined again after welding or for non-sealing service.

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

Decide the bore class before the tube is drawn. Reaching H7 from a size already drawn for H9 means removing more material on the bore and usually starting from a thicker wall; a tube drawn for H9 cannot simply be honed into H7 without ending up larger than ordered.

Wall thickness tolerance

EN 10305-1 defines two wall-tolerance grades. The standard grade is adequate for most barrel tubes; the precision grade is used where wall uniformity drives the pressure rating.

Grade	Wall tolerance	When to use
Standard	±10 % of nominal, or ±0.1 mm, whichever is greater	Default for honed barrels
Precision	±5 % of nominal (formal EN grade)	Tight wall control; high-pressure or thin-wall sizes

By agreement, wall tolerance may be replaced by a fixed absolute value (e.g. ±0.2 mm), which is the sensible choice for very thin walls where a percentage becomes meaningless.
 

Outside diameter (OD) tolerance

For honed / cylinder tubes the bore is the controlled dimension; the OD is held to a commercial band so the tube can be machined, welded or chromed on the outside. EN 10305-1 also offers a precise and a normal OD class — confirm which one your supplier quotes.

Outside diameter (mm)	Typical commercial OD tolerance (±)
≤ 40	0.15
> 40 – 60	0.25
> 60 – 100	0.40
> 100 – 160	0.50
> 160 – 250	0.80
> 250 – 400	1.50

Out-of-roundness (ovality) is contained within the OD tolerance under EN 10305-1, so a separate ovality number is normally not quoted for precision tubes.

Surface finish, straightness & geometry

Property	Honed finish	Skived & roller burnished (SRB)
Bore roughness Ra	0.2 – 0.4 µm	0.05 – 0.2 µm
Cross-hatch angle	30° – 45°	30° – 45°
Straightness	≤ 0.5 mm/m (local)	≤ 0.5 mm/m (local)
Outer surface	smooth cold-drawn	smooth cold-drawn

EN 10305-1 base straightness for precision tubes is 1.0 mm/m; honed and SRB finishing typically holds the tighter 0.5 mm/m local deviation quoted above. The 30°–45° cross-hatch is functional — it retains lubricating oil on the bore and is not a cosmetic mark.
 

Mechanical properties by delivery condition

E355 is supplied in several delivery conditions, and the delivery condition sets the yield strength. The cold-worked states (+C, +LC) quote tensile strength and elongation only; the yield is derived from the tensile by the ratios shown. Stress-relieved (+SR) and normalized (+N) give a fixed minimum yield.

Delivery condition	Rm min (MPa)	ReH min (MPa)	A min (%)	Note
+C (cold drawn / hard)	640	≈ 0.8 × Rm	4	Yield derived, not separately guaranteed
+LC (cold drawn / soft)	580	≈ 0.7 × Rm	7	Yield derived
+SR (stress relieved)	580	450	10	≥ 420 MPa for OD ≥ 160 mm
+A (annealed)	450	≈ 0.5 × Rm	22	Yield derived
+N (normalized)	490 – 630	355	22	−10 MPa for OD ≤ 30 mm & wall ≤ 3 mm

For barrel tube, +SR (ReH ≥ 450 MPa) is the workhorse condition; +N (ReH ≥ 355 MPa) is the figure that fills many online datasheets and understates the steel by about a quarter. Design against the value that matches the delivery condition on your order, not the first number you find.

Chemical composition

Cast-analysis limits from EN 10305-1:2016 Table 2 (maximum unless a minimum is shown). Product analysis carries a permitted deviation — judge a mill certificate against the upper limit plus that deviation.

Element	C	Si	Mn	P	S	Al (total)
Limit, % by mass	0.22 max	0.55 max	1.60 max	0.025 max	0.025 max	0.020 min

 

Standard size schedule (cylinder barrels)

A representative spread of E355 honed-tube sizes actually quoted by mills. All dimensions are millimetres (ID × OD × wall). If your bore is not listed, it is made to order from the supply range above.

ID	OD	Wall	ID	OD	Wall	ID	OD	Wall	ID	OD	Wall
40	50	5	70	80	5	100	110	5	140	160	10
40	55	7.5	70	85	7.5	100	115	7.5	140	165	12.5
50	60	5	70	90	10	100	120	10	140	170	15
50	65	7.5	75	85	5	100	125	12.5	150	170	10
50	70	10	75	90	7.5	100	127	13.5	150	180	15
60	70	5	75	95	10	110	125	7.5	160	180	10
60	75	7.5	80	90	5	110	130	10	160	185	12.5
60	80	10	80	95	7.5	120	140	10	160	190	15
63	73	5	80	100	10	120	145	12.5	160	200	20
63	76	6.5	90	100	5	120	150	15	180	200	10
63	80	8.5	90	105	7.5	125	145	10	180	210	15
63	83	10	90	110	10	125	150	12.5	180	220	20
63	78	7.5	90	114	12	130	150	10	200	220	10
65	75	5	95	110	7.5	130	160	15	200	230	15
65	80	7.5	95	114	9.5	130	152	11	200	245	22.5
65	85	10	100	106	3	135	160	12.5	220	250	15
68	80	6	100	108	4	135	165	15	220	270	25
68	83	7.5	100	114	7	140	152	6	250	290	20
70	82	6	100	121	10.5	140	156	8	250	299	24.5

Approximate weight (kg/m) ≈ (OD − Wall) × Wall × 0.02466. This is a screening figure, not a tolerance value.
 

Choosing the bore tolerance class

Class	What it costs	Reasonable when
H8	No premium at most sizes	Standard barrel; piston seals run directly on the bore (the normal case)
H7	More stock removed, higher rejection rate	Interference fits or precision guide bores where the seal package is dimensionally critical
H9	Slightly cheaper, wider band	Bore will be finish-machined after welding, or a liner/sleeve is fitted
H10	Cheapest honed class	Non-sealing cylinders or telescopic stages with separate wear rings

FAQ

What size range does E355 honed tube cover?

Per EN 10305-1:2016 the standard covers outside diameters up to 380 mm; most suppliers offer honed bores from about 30 mm to 500 mm (imperial bores 1.5 in to 20 in), wall thickness 4–50 mm, and lengths up to 12 m, cut to length on request.

What bore tolerance classes are available for E355 honed tube?

The bore is finished to ISO 286-2 hole classes. H8 is the standard class for cylinder barrels; H7 is supplied for precision guide bores, and H9 or H10 for bores that are finish-machined after welding or for non-sealing service. All classes are +tolerance/0 (the bore is never undersize).

Which delivery condition gives the highest yield for E355 honed tube?

Stress-relieved (+SR, BKS) gives ReH at least 450 MPa (at least 420 MPa for OD 160 mm and above); normalized (+N, NBK) gives ReH at least 355 MPa. The cold-worked states (+C, +LC) quote tensile strength only, with yield derived from it. For barrel tube, +SR is the workhorse condition.

What wall thickness tolerance applies to EN 10305-1 honed tube?

The standard grade is plus/minus 10 percent of nominal wall, or plus/minus 0.1 mm, whichever is greater; a precision grade of plus/minus 5 percent is also defined. For very thin walls a fixed absolute tolerance (for example plus/minus 0.2 mm) is agreed instead.

Is E355 the same as ST 52-3?

Yes. E355 and ST 52-3 are the same carbon-manganese steel under material number 1.0580. E355 is the current EN 10305-1 designation; ST 52-3 is the legacy DIN name still found on old drawings and specifications.