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Tubes for parts of machines and general use

Application examples:

  • as structural elements in various machines (e.g. shafts, axles, guides);
  • as cylinders in hydraulic and pneumatic systems;
  • as structural elements in various construction and engineering projects;
  • as tool elements (e.g. pliers, wrenches);
  • as transmission elements (e.g. drive shafts, auxiliary shafts).
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Standards

  • EN 10297-1 Seamless circular steel tubes for mechanical and general engineering purposes.
  • EN 10294-1 Hollow bars for machining. Part 1: Non-alloy and alloy steel.
  • EN 10084 Case hardening steel.TDC.
  • EN 10083 Steels for quenching and tempering. Part 1: General TDC. Part 2: TDC for non-alloy steels.
  • DIN 17210 Case hardening steels. TDC.
  • DIN 17204 Seamless circular tubes of steel for quenching and tempering. TDC.
  • DIN 17200 Steels for quenching and tempering.
  • DIN 1629 Seamless circular tubes of non-alloy steel with special quality requirements. TDC.
  • DIN 1630 Seamless circular tubes of non-alloy steel with very high quality requirements. TDC.

Steel grades:

  • according to EN 10297-1: E355, E420J2, E470, 20NiCrMo2-2, 25CrMo4, 30CrMo4, 34CrMo4, 38Mn6, 42CrMo4
  • according to EN 10294-1: 20MnV6+AR, 20MnV6+N, E355+AR, E355+N
  • according to EN 10084: 16MnCr5, C10E, C10R, C15E, C16E, C16R
  • according to EN 10083-2: 28Mn6, C22, C22E, C22R, C25, C25E
  • according to DIN 17210: 16MnCr5, C10, C15, Ck10, Ck15, Cm15
  • according to DIN 17204: C22, C35, C45, C55, Ck22, Ck35, Ck45, Ck55, Cm22, Cm35, Cm45
  • according to DIN 17200: Cm55
  • according to DIN 1629: St37.0, St44.0, St52.0
  • according to DIN 1630: St37.4, St44.4, St52.4

Means of production

  • hot rolling or cold forming (besides precision tubes) depends upon the standards, tube dimensions and the agreement when ordering. The tube tolerances meet the  requirements of appropriate standards.Dimensions and weight of seamless steel tubes according to EN 10220

     

  • 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 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.
Tolerance EN 10297-1 EN 10294-1
exact length (L) L < 6 m: 0+10 mm 6 m ≤ L ≤ 12 m: 0+15 mm L > 12 m: upon agreementupon agreement
wall thickness (T) D ≤ 219,1 mm: ± 12,5 %, min ± 0,4 mm D ≤ 180 mm, T ≤ 15 mm: ± 12,5 %, min ± 0,4 mm
outer diameter (D) D ≤ 219,1 mm: ± 1 %, min ± 0,5 mm D < 75 mm: ± 0,5 mm 75 mm ≤ D ≤ 180 mm: ± 0,75 % D > 180 mm: ± 1 %