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Seamless Tubes and Tube based Products for the Automotive Industry

ISMT manufactures seamless tubes and tube based value-added products for a wide range of applications in the automotive and heavy vehicle industries. We are one of the few integrated manufacturers of seamless tubes globally, producing all steel in-house for the manufacture of tubes. Thus, we retain complete control over quality and delivery of the final product. Our strength lies in our understanding of tube properties specific to each automotive application; in being able to develop special grades of steel to meet a particular requirement; in supplying small lots - cost effectively; and in the wide range of tubes that we can supply. In addition, with over 25 years of experience in manufacturing and supplying tubes to the automotive industry worldwide we are entirely familiar with the needs and expectations of the industry.


ISMT manufactures seamless tubes ranging from an outer diameter of 6 mm to 273 mm for a wide variety of applications. Typical uses include:

  • Stabilizer bars
  • Air bag canisters
  • Front wheel drive shafts
  • Anti-roll bars
  • Piston pins
  • Collapsible steering columns
  • Steering linkages
  • Transmission shafts or Propeller shafts
  • Trailer axles
  • Stub axles
  • Gear shafts
  • Common rails (Diesel engines)
  • Clutch parts
  • CV cages

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Typical Automotive Grades

SAE 1019, 1518, 1035, 1040, SAE 4130H, SAE 4140H, SAE 8620, 20 Mn Cr5, 16NiCr4 and ST-62-N. Other steel grades may also be used on specific request.


Standard specifications that we manufacture include BS980, DIN 2391, BS 1717, IS 1601, IS 1074, JIS Gr.6, STK 45. In addition we also manufacture to customized specification depending on the requirements of a particular customer.

Standard Packing

Each tube is oiled, internally as well as externally, and then packed into hexagonal bundles. This ensures that the tubes are corrosion protected and that they retain their straightness during transport. Upon request we can provide end caps and also wrap the bundles in LDPE sheets.


Tubes are generally supplied in random lengths of 4 to 7 meters (or in a different range as per customer specifications). Tubes in exact lengths, multiples of specified unit lengths or in long lengths can also be supplied.

Testing And Inspection

All our tubes are tested as per customer requirements. Our testing facilities include full-body Ultrasonic, Eddy Current, Leakage-Flux and Hydro-testing.

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