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Steel tubes for mechanical engineering, machine components and general use


Steel tubes have an irreplaceable role for their unique characteristics, i.e. wide range of sizes, variety of available steel grades and welding ability. Tubes for mechanical engineering and parts of machines are used for manufacturing in various types of machine parts and at the same time they can be used in many other industrial areas.

Possible applications of steel tubes:

  • pressure vessels
  • parts and the axis of the machine units
  • construction elements of machines
  • basis and supports of machines
  • design features for storages and containers
  • fixtures for tools
  • parts of agricultural machinery
  • conveyor belts
  • elements of ships
Steel tubes for mechanical engineering, machine components and general use

Mechanical tube sizes

OUTER DIAMETER (OD)10,2 – 139,7 mm
WALL THICKNESS (WT)0,5 – 16,0 mm
EUROPEAN STANDARDSEN 10294-1, EN 10297-1,
EN 10305-1,
DIN 2448,
BS 6323/3,
NF A 49-311,
UNI 4991, UNI 7729,
STN/ČSN 42 5715,
STN/ČSN 42 5716,
and PN-H 74219.
RUSSIAN STANDARDSGOST 8732
AMERICAN STANDARDSASTM A 53
and ASTM A 519
JAPANESE STANDARDSJIS G 3445
Dimensional standard SIZES (OD x WT) Dimensional table
EN10294-110.2 x 0.5 – 139.7 x 16.0 mm
EN10297-1 (10220)10.2 x 0.5 – 139.7 x 16.0 mm
DIN244810.2 x 0.5 – 139.7 x 16.0 mm
STN42 571510.2 x 0.5 – 139.7 x 16.0 mm
STN42 571610.2 x 0.5 – 139.7 x 16.0 mm
NF A49-31110.2 x 0.5 – 139.7 x 16.0 mm
NF A49-31210.2 x 0.5 – 139.7 x 16.0 mm
BS6323-310.2 x 0.5 – 139.7 x 16.0 mm
PN – H7421910.2 x 0.5 – 139.7 x 16.0 mm
UNI772910.2 x 0.5 – 139.7 x 16.0 mm
GOST873220.0 x 2.5 – 140.0 x 16.0 mm
ASTMA51931.75 x 2.34 – 139.7 x 12.7 mm [1.250 x 0.088 – 5.500 x 0.500 in] [13 – 7/0 GA]
ASTMA5310.3 x 1.24 – 114.3 x 13.49 mm [0.405 x 0.049 – 4.500 x 0.531 in] [1/8 – 4 NPS]
JISG344515.9 x 1.2 – 114.3 x 9.5 mm
UNIISO 420010.2 x 0.5 – 139.7 x 16.0 mm

Steel grades for tubes intended for mechanical engineering

EN 10297-1
EN 10083-2		E235, E275, E315, E355, E420, E460, E470, E275K2, E355K2, E460K2, E420J2, 20MnV6, 16MnCr5, 20NiCrMo2-2, 25CrMo4, 28Mn6, 30CrMo4, 34CrMo4, 38Mn6, 42CrMo4, C10E, C15E, C15R, C22E, C35E, C45E, C60E.
ASTM A 53/A530
ASTM SA53/SA 530		Grade A, Grade B.

Standard TDC Steel grade (open product) Dimensional standard
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
JISG3445G3445
ASTMA53/A530A53
ASTMA53/A530A53
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
ASTMA519A519
GOST8731 / 10508732
GOST8731 / 10508732
GOST8731 / 10508732
GOST8731 / 10508732
GOST8731 / 192818732
STN42 025042 5715
STN42 025042 5716
STN42 025042 5716
STN42 025042 5715
STN42 025042 5715
STN42 025042 5716
STN42 025042 5716
STN42 025042 5715
STN42 025042 5715
STN42 025042 5716
STN42 025042 5716
STN42 025042 5715
STN42 025042 5716
STN42 025042 5716
STN42 025042 5716
STN42 025042 5715
STN42 025042 5715
STN42 025042 5715
EN10297-110297-1 (10220)
EN10297-110297-1 (10220)
UNI77297729
PN – H74219 / 8401974219
EN10297-110297-1 (10220)
NF A49-31149-311
EN10297-110297-1 (10220)
UNI663ISO 4200
UNI663ISO 4200
EN10297-110297-1 (10220)
EN10297-110297-1 (10220)
BS6323-1,36323-3
EN10083-210297-1 (10220)
EN10294-110294-1
ČSN42 025042 5716
EN10083-210297-1 (10220)
EN10297-110297-1 (10220)
ČSN42 025042 5716
DIN172042448
EN1008410297-1 (10220)
EN10083-210297-1 (10220)
UNI663ISO 4200
EN10297-110294-1
EN10297-110294-1
EN10083-210297-1 (10220)
ČSN42 025042 5715
ČSN42 025042 5716
EN10294-110294-1
ČSN42 025042 5715
DIN16302448
DIN172042448
EN10294-110294-1
DIN16292448
DIN172042448
ČSN42 025042 5716
DIN16292448
ČSN42 025042 5716
PN – H74219 / 8401974219
ČSN42 025042 5716
EN10297-110294-1
EN10083-210297-1 (10220)
DIN172042448
EN10083-210297-1 (10220)
EN10083-210297-1 (10220)
EN10083-210297-1 (10220)
DIN16302448
DIN172042448
DIN172002448
ČSN42 025042 5715
EN10297-110297-1 (10220)
EN1008410297-1 (10220)
UNI663ISO 4200
EN10297-110297-1 (10220)
ČSN42 025042 5715
EN10083-210297-1 (10220)
DIN172102448
PN – H74219 / 8402374219
EN10083-210297-1 (10220)
EN10297-110297-1 (10220)
ČSN42 025042 5715
DIN172102448
EN1008410297-1 (10220)
PN – H74219 / 8401974219
EN10083-210297-1 (10220)
EN10297-110297-1 (10220)
DIN172042448
UNI663ISO 4200
DIN172102448
EN10294-110294-1
DIN172042448
PN – H74219 / 8402374219
EN10297-110297-1 (10220)
EN1008410297-1 (10220)
PN – H74219 / 8401874219
BS6323-1,36323-3
DIN16292448
ČSN42 025042 5716
EN10083-210297-1 (10220)
ČSN42 025042 5715
EN10083-210297-1 (10220)
EN10083-210297-1 (10220)
DIN172102448
NF A49-31249-312
EN10083-210297-1 (10220)
ČSN42 025042 5716
ČSN42 025042 5715
PN – H74219 / 8402374219
NF A49-31149-311
PN – H74219 / 8402374219
EN1008410297-1 (10220)
UNI77297729
DIN172042448
EN10297-110297-1 (10220)
DIN172102448
EN10083-210297-1 (10220)
DIN172102448
PN – H74219 / 8401974219
BS6323-1,36323-3
UNI663ISO 4200
BS6323-1,36323-3
EN1008410297-1 (10220)
EN10083-210297-1 (10220)
EN10083-210297-1 (10220)
ČSN42 025042 5715
DIN16302448
EN10083-210297-1 (10220)
PN – H74219 / 8401874219
UNI77297729
EN1008410297-1 (10220)
PN – H74219 / 8401974219
EN10083-210297-1 (10220)
EN10083-210297-1 (10220)
EN10083-210297-1 (10220)
ČSN42 025042 5716
ČSN42 025042 5715
UNI663ISO 4200
NF A49-31249-312
EN10083-210297-1 (10220)
NF A49-31149-311
NF A49-31149-311
DIN172042448
EN10083-210297-1 (10220)
DIN172042448
DIN172042448
EN10083-210297-1 (10220)
UNI663ISO 4200

Tube lengths for mechanical engineering

Usually the tubes are supplied in the production length (5 to 6 meters). A precise length may be supplied upon request.

Tube testing

According to EN 10294 – 1 standards the tubes are subjected to specific testing which consists of:

a, cast analysis,
b, tensile test and notched impact strength test (where possible),
c, dimensional inspection,
d, visual inspection.

Additionally according to the EN 10297 – 1 we can provide:

a, nonspecified testing for the steels grade 2.1.1 if by choice there is no agreement about a specific test
b, specific testing for other grades of steel.

The mandatory tests for nonspecified testing are in concurrence with the EN 10294-1, the optional tests are shown in the standards.

Tube 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 storage.

The tubes may be supplied without temporarily preservation of the surface or with an agreed upon preservative.

Tube 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: 26,7 – 114,3 mm
  • Tube WT: 3,2 – 12,5 mm
  • Tube lengths: 4 – 13 m
  • Deburring angle, α (alpha): 30°+5°, 37,5°±2,5°
  • Dimension, c: 1,6 ± 0,8 mm

Packaging of mechanical tubes

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

Tubes are supplied in packages with a circular or hexagonal outline with weight of 300 to 3 500 kilograms.

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 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).

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

Certified test reports

Certified test reports are issued according to the appropriate TDC standards:
EN 10204,
for
EN 10294-1		certificate 3.1.B,
EN 10297-1(a) nonspecified testing 2.1 and 2.2,
(b) specified testing – 3.1.B or others


Tube straightness

1.5 x 1000 is the required straightness for the tubes that have diameter up to 33.7 mm and which are intended for machine components.

For tubes that are going to be mechanically machined the required straightness is 1: 1000, i.e. 0.001 x L.

The condition, delivery and surface

Hot rolled tubes made out of carbon steel do not go through further heat treatment and their condition is the same as the condition of normally annealed tubes.


After forming, the cold drawn tubes are heat treated in such a way that they would meet the requirements of the appropriate standards as far as the condition of delivery and the mechanical values are concerned.

The inner and outer surface of the tubes corresponds to the manufacturing means.



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+421 48 6451111 | admin@zelpo.sk

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