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

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
EN10297-110.2 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)
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
JISG3445
ASTMA53/A530
ASTMA53/A530
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
ASTMA519
GOST8731 / 1050
GOST8731 / 1050
GOST8731 / 1050
GOST8731 / 1050
GOST8731 / 19281
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
STN42 0250
EN10297-1
EN10297-1
UNI7729
PN – H74219 / 84019
EN10297-1
NF A49-311
EN10297-1
UNI663
UNI663
EN10297-1
EN10297-1
BS6323-1,3
EN10083-2
EN10294-1
ČSN42 0250
EN10083-2
EN10297-1
ČSN42 0250
DIN17204
EN10084
EN10083-2
UNI663
EN10297-1
EN10297-1
EN10083-2
ČSN42 0250
ČSN42 0250
EN10294-1
ČSN42 0250
DIN1630
DIN17204
EN10294-1
DIN1629
DIN17204
ČSN42 0250
DIN1629
ČSN42 0250
PN – H74219 / 84019
ČSN42 0250
EN10297-1
EN10083-2
DIN17204
EN10083-2
EN10083-2
EN10083-2
DIN1630
DIN17204
DIN17200
ČSN42 0250
EN10297-1
EN10084
UNI663
EN10297-1
ČSN42 0250
EN10083-2
DIN17210
PN – H74219 / 84023
EN10083-2
EN10297-1
ČSN42 0250
DIN17210
EN10084
PN – H74219 / 84019
EN10083-2
EN10297-1
DIN17204
UNI663
DIN17210
EN10294-1
DIN17204
PN – H74219 / 84023
EN10297-1
EN10084
PN – H74219 / 84018
BS6323-1,3
DIN1629
ČSN42 0250
EN10083-2
ČSN42 0250
EN10083-2
EN10083-2
DIN17210
NF A49-312
EN10083-2
ČSN42 0250
ČSN42 0250
PN – H74219 / 84023
NF A49-311
PN – H74219 / 84023
EN10084
UNI7729
DIN17204
EN10297-1
DIN17210
EN10083-2
DIN17210
PN – H74219 / 84019
BS6323-1,3
UNI663
BS6323-1,3
EN10084
EN10083-2
EN10083-2
ČSN42 0250
DIN1630
EN10083-2
PN – H74219 / 84018
UNI7729
EN10084
PN – H74219 / 84019
EN10083-2
EN10083-2
EN10083-2
ČSN42 0250
ČSN42 0250
UNI663
NF A49-312
EN10083-2
NF A49-311
NF A49-311
DIN17204
EN10083-2
DIN17204
DIN17204
EN10083-2
UNI663

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 stee
l.

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

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


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.

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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