Železiarne Podbrezová a.s. |
Ask for quote | +421 48 6451111

Standard precision seamless steel tubes


Standard precision tubes are produced using the cold drawn process. Seamless steel tubes can be supplied as cut tubes and bent tubes. Cut tubes are designed especially for manufacturers of automotive components.

Precision steel tubes from our production satisfy the requirements for the following applications: components for the vehicle drivetrain, cars suspension systems, fuel injection, components for engine and transmission, components for body and chassis, vehicle control systems and others.

AI assistant

Need a quotation?

Tell us what you need and we will put the enquiry together in the chat.

Or fill in the enquiry form

Standard precision seamless steel tubes

Dimensions of standard precision tubes

OUTER DIAMETER (OD)4,0 – 125,0 mm
WALL THICKNESS (WT)0,5 – 12,5 mm
EUROPEAN STANDARDSEN 10305-1,
DIN 2391,
BS 6323/4,
NF A 49-310, NF A 49-312,
UNI 7945,
STN/ČSN 42 6711,
STN/ČSN 42 6712,
PN-H 74240, PN-H 74220
RUSSIAN STANDARDSGOST 8734, 9567, 12132
AMERICAN
STANDARDS		ASTM A450 a A519
JAPANESE STANDARDSJIS G3445
for standard usePrecision seamless steel tubes14
Dimensional standard SIZES (OD x WT) Dimensional table
EN 10305-1 4.0 x 0.5 – 120.0 x 13.0 mm Dimensional table
ASTM A519 6.35 x 0.51 – 120.65 x 9.53 mm [0.250 x 0.020 – 4.750 x 0.375 in] [25 – 3/8 GA]
GOST 12132 4.0 x 0.5 – 120.0 x 10.0 mm Dimensional table
GOST 8734 4.0 x 0.5 – 120.0 x 10.0 mm Dimensional table
GOST 9567 4.0 x 0.5 – 120.0 x 10.0 mm Dimensional table
JIS G3445 15.9 x 1.2 – 114.3 x 9.5 mm Dimensional table
Withdrawn standards They may still be used occasionally
BS 6323-4 4.0 x 0.5 – 120.0 x 13.0 mm Dimensional table
DIN 2391-1 4.0 x 0.5 – 120.0 x 13.0 mm Dimensional table
NF A 49-310 4.0 x 0.5 – 120.0 x 13.0 mm Dimensional table
NF A 49-312 4.0 x 0.5 – 120.0 x 13.0 mm Dimensional table
UNI 7945 4.0 x 0.5 – 120.0 x 13.0 mm Dimensional table
PN – H 74240 4.0 x 0.5 – 120.0 x 13.0 mm Dimensional table
ČSN 42 6711 4.0 x 0.5 – 120.0 x 13.0 mm Dimensional table
ČSN 42 6712 4.0 x 0.5 – 120.0 x 13.0 mm Dimensional table

Steel grades for standard precision tubes

EN 10305-1E215, E235, E255, E355, E410, 26Mn5, 26Mo2, C35E, C45E, 25CrMo4, 42CrMo4, 25CrMo4
ASTM 519, SAE1-21008, 1010, 1012, 1015, 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1025, 1026, 1030, 1035, 1040, 1045, 1050, 1518, 4130, 4140, 4142, 8617.
JIS G3445STKM11A, STKM12A, STKM12B, STKM12C, STKM13A, STKM13B, STKM13C, STKM14A, STKM14B, STKM14C, STKM15A, STKM15C, STKM16A, STKM16C, STKM17A, STKM17C, STKM18A, STKM18B, STKM18C, STKM19A, STKM19C, STKM20A
DIN 239St35, St45, St52.
for standard usePrecision seamless steel tubes137
Standard TDC Steel grade (open product)
EN 10305-1 C45E
EN 10305-1 E235
EN 10305-1 C35E
EN 10305-1 E355
EN 10305-1 26Mo2
EN 10305-1 26Mn5
EN 10305-1 E255
EN 10305-1 42CrMo4
EN 10305-1 E410 (20V1)
EN 10305-1 25CrMo4
ASTM A519 MT1020
ASTM A519 1518
ASTM A519 MT1010
ASTM A519 1045
ASTM A519 1524
ASTM A519 1017
ASTM A519 1010
ASTM A519 MT1015
ASTM A519 1008
ASTM A519 1019
ASTM A519 1015
ASTM A519 1018
ASTM A519 1020
ASTM A519 1021
ASTM A519 1012
ASTM A519 1035
ASTM A519 1030
ASTM A519 MTX1015
ASTM A519 1541
ASTM A519 MTX1020
ASTM A519 1050
ASTM A519 1040
ASTM A519 1022
ASTM A519 1026
ASTM A519 1025
GOST 8733 / 1050 10
GOST 12132 / 1050 20
GOST 8733 / 19281 09G2S
GOST 21729 / 1050 45
GOST 8733 / 1050 35
GOST 8733 / 1050 45
GOST 21729 / 4543 10G2
GOST 8733 / 4543 15ChM
GOST 12132 / 1050 45
GOST 12132 / 1050 35
GOST 8733 / 4543 10G2
GOST 8733 / 1050 20
GOST 12132 / 19281 09G2S
GOST 12132 / 1050 10
JIS G3445 STKM19A
JIS G3445 STKM12B
JIS G3445 STKM13A
JIS G3445 STKM17C
JIS G3445 STKM13C
JIS G3445 STKM16A
JIS G3445 STKM17A
JIS G3445 STKM14A
JIS G3445 STKM20A
JIS G3445 STKM12A
JIS G3445 STKM14B
JIS G3445 STKM15C
JIS G3445 STKM18B
JIS G3445 STKM19C
JIS G3445 STKM13B
JIS G3445 STKM14C
JIS G3445 STKM16C
JIS G3445 STKM18C
JIS G3445 STKM11A
JIS G3445 STKM12C
JIS G3445 STKM18A
JIS G3445 STKM15A
Withdrawn standards They may still be used occasionally
BS 6323-1,4 CFS 5
BS 6323-1,4 CFS 8
BS 6323-1,4 CFS 7
BS 6323-1,4 CFS 3
BS 6323-1,4 CFS 4
BS 6323-1,4 CFS 6
DIN 2391-2 St 52
DIN 2391-2 St 45
DIN 2391-2 St 35
NF A 49-312 S450MG2
NF A 49-310 TU 37-b
NF A 49-310 TU 52-b
NF A 49-310 TU 20MV6
NF A 49-312 S470M
UNI 7945 Fe 360
UNI 7945 Fe 320
UNI 7945 Fe 280
UNI 7945 Fe 410
UNI 7945 Fe 490
PN – H 74240 / 84019 20
PN – H 74240 / 84019 35
PN – H 74240 / 84023 R65
PN – H 74240 / 84018 18G2
PN – H 74240 / 84019 45
PN – H 74240 / 84023 R45
PN – H 74240 / 84023 R55
PN – H 74240 / 84019 10
PN – H 74240 / 84019 55
PN – H 74240 / 84023 R35
PN – H 74240 / 84018 18G2A
STN 42 0260 11 650
STN 42 0260 11 453
STN 42 0260 12 040
STN 42 0260 11 523
STN 42 0260 11 503
STN 42 0260 11 550
STN 42 0260 11 353
STN 42 0260 12 060
STN 42 0260 12 050
STN 42 0260 11 503
STN 42 0260 11 523
STN 42 0260 11 550
STN 42 0260 12 060
STN 42 0260 12 040
STN 42 0260 12 050
STN 42 0260 11 650
STN 42 0260 11 453
STN 42 0260 11 353
ČSN 42 0260 11 453
ČSN 42 0260 12 060
ČSN 42 0260 12 050
ČSN 42 0260 11 550
ČSN 42 0260 11 353
ČSN 42 0260 11 650
ČSN 42 0260 11 353
ČSN 42 0260 11 523
ČSN 42 0260 11 503
ČSN 42 0260 12 050
ČSN 42 0260 11 650
ČSN 42 0260 12 060
ČSN 42 0260 12 040
ČSN 42 0260 11 453
ČSN 42 0260 12 040
ČSN 42 0260 11 523
ČSN 42 0260 11 550
ČSN 42 0260 11 503

Tolerances for standard precision tubes

Tolerances of the precision tubes are in accordance with the appropriate dimensional tables of standards. Usual value for the outside diameter (OD) is less than 0.5% of OD in no heat treatment process used. For the heat treated tubes, tolerance values are depended upon the relation of the wall thickness and the tube diameter (WT/OD) and are larger (up to a single or twofold).

In tolerances of the outside diameter (OD) the allowed deviation of circularity is included. When ordering based on the wall thickness, the tolerance is 10% from the wall thickness. Eccentricity of precision tube is included in the wall thickness tolerance.

Reduced tolerances for metrical sizes – European standards.

Length of the standard precision tubes

Maximum tubes length is 18 meters.

Types of supplied length are:

(a) random length, in the range of 3 – 7 (9) m,
(b) fixed length, ± 500 mm,
(c) exact length, – 0 / + x mm (x upon agreement),
(d) tubes can be supplied as cut tubes,
(e) cut tubes – from 15 mm

Standard precision tube testing

Mandatory testing:
(a) cast / chemical analysis
(b) tensile test,
(c) dimensional inspecti,
(d) visual inspection of the tubes surface.

Optional testing:
(a) flattening test or drift expanding test,
(b) roughness measurement NDT to find longitudinal defects,
(c) eddy current (STN 01 5054, PRP 02-74, SEP 1925, ASTM E 309, EN 10246-3 Gr.E3),
(d) stray flux (STN 01 5047, ČSN 01 5047, SEP 1913, ASTM E 570, EN 10246-5 Gr.F3),
(e) ultrasound (STN 01 5028, ČSN 01 5028, SEP 1915, ASTM E 213, EN 10246-7 Gr.U3),
(f) NDT as a proof of tightness or leakage test by eddy current EN 10246-1.

Standard precision tubes ends

The tubes with deburred ends or ends customized for welding.
The tubes with deburred ends or ends customized for welding.
The ends are vertical to the longitudinal axis and are without burrs.
The ends are vertical to the longitudinal axis and are without burrs.

Deburring applies to:

Deburring
  • Tube OD: 19,0 – 90,0 mm
  • Tube WT: 2,0 – 10,0 mm
  • Tube lengths: 3 – 7 m
  • Deburring angle, α (alpha): 30°+5°, 37,5°±2,5°, 45°±2,5°
  • Dimension, c: 1,6 ± 0,8 mm

Standard precision tubes surface protection

While ordering, it is necessary to agree upon the method and means of temporarily protecting the surface of the tubes during transportation and storiage.

AI assistant

Need a quotation?

Tell us what you need and we will put the enquiry together in the chat.

Or fill in the enquiry form

Packaging of the standard precision tubes

(a) tubes bound with a steel band,
(b) tubes wrapped in plastic sheets, burlap,
(c) tubes in wooden crates.

Standard precision tubes are supplied in packages with a circular or hexagonal outline with maximum weight of 2 000 kg

Packaking-STANDARD-tubes bound with a steel band
Packaking-STANDARD-tubes bound with a steel band
Packaking-STANDARD-bundle tied down by steel strap underlaid by paper
Packaking-STANDARD-bundle tied down by steel strap underlaid by paper
Packaking-STANDARD-PLUS-paper tape and polyethylene foil
Packaking-STANDARD-PLUS-paper tape and polyethylene foil
Packaking-STANDARD-PLUS-the bundle placed into a wooden box
Packaking-STANDARD-PLUS-the bundle placed into a wooden box
Packaking-PREMIUM-B-into a wooden box in which the tubes are wrapped in foil
Packaking-PREMIUM-B-into a wooden box in which the tubes are wrapped in foil
Packaking-PREMIUM-C-the bandles are wraped into and plastic foil
Packaking-PREMIUM-C-the bandles are wraped into and plastic foil
Packaking-PREMIUM-D-placing the whole shipment into foil+vacuum sealed
Packaking-PREMIUM-D-placing the whole shipment into foil+vacuum sealed

Marking of standard precision tubes and tube bundles

(a) without marking,
(b) marked with colored stripes on the tubes (tube bundles),
(c) marked with spray either by a white or black color using InkJet,
(d) marked by stamping the data (this applies to OD > 22 mm and WT >2.3 mm).

Bundles of tubes are marked with one or more labels with the required data.

Marked by a label
Marked by a label
Marked with spray either by a white or black color using InkJet
Marked with spray either by a white or black color using InkJet
Marked by stamping the data
Marked by stamping the data

Certified test reports for standard precision tubes

EN 10204
2.2 nonspecified testing (only mandatory tests),
3.1 specific testing,
3.2 after agreement .

Straightness of standard precision tubes

Straightness of the tubes is influenced by the mechanical properties of the tubes.


For material having the yield point ReH <= 500 MPa is straightness 0,0015 multiple of the tube length maximum, allowed straightness for one meter length is 1.5 milimeters.

For material with the yield point ReH > 500 MPa the allowable straightness for the whole length of the tube is 0.0020 multiple of the tube length, allowed straightness of one meter is 2 milimeters.

Delivery condition and precision tubes surface

Precision tubes are supplied in condition that is presented in the table below. It is marking for thermal processing according to EN 10305-1.

+C Cold drawn / hard. After the last cold forming no heat treatment.


+LC Cold drawn / soft. After the last heat treatment follows the cold drawing there is a light finishing pass.


+SR Cold drawn and stress relieved annealed. After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.


+A Annealed. After the last cold drawing process the tubes are annealed in a controlled atmosphere.


+N Normalized. After the last cold drawing process the tubes are annealed in a controlled atmosphere.

Marking for material condition according to DIN 2391-2 and ASTM 519 may be found here.



Contact us

Are you interested in cooperation? Send us an inquiry, or order the goods directly from stock.
+421 48 6451111 | admin@zelpo.sk

Download the Product portfolio of steel tubes

Send us your INQUIRY

 Your ASK FOR QUOTE form