Steel Tubes...Lighter and Stronger AISI 4130 -  steel. A low alloy steel is used in oil patch applications and used widely as an aircraft steel. 4130 is an oil and gas steel grade with a lower carbon content than 4140  giving 4130 improved weldability, the trade off is reduced through thickness strength. 4130 has a low resistance to corrosion. 4130 can also be used to make car connecting rods, shafts, fittings, and engine mounting lugs, bushes, gears, axles, bolts, gas cylinders, airframe components, hydraulic lines and nitrided machinery parts. Typical range of hardness is 90-96 Rockwell B.

The 41xx family of steel includes chromium and molybdenum and are often referred to as chromoly steel or chrome-moly. Chromoly steels have an excellent strength to weight ratio but do not contain sufficient quantities to provide the levels of corrosion resistance found in stainless steels. These steel are often used in aircraft parts also frequently used within the gas and oil industry also in Chassis of F car.

Approximate equivalents : 25CrMo4, DIN 1.7218, 30CrMo, 708A25, 708M25, 30CrMo, SCM430

• Formulae to Calculate weight of 4130 Tube or Pipe :

  • Weight of  S.S. Pipe : 

    • O.D. ( mm ) – W Thick ( mm ) X  W.Thick ( mm ) X 0.024866 = Wt. Per Mtr.

    • O.D. ( mm ) – W Thick ( mm ) X  W.Thick ( mm ) X 0.00756 = Wt. Per Mtr.

• For Tubing Selection in BAJA , SUPRA and other Competitions

  • Standard conversion factors

  • Inch = 25.4 Millimetre

  • FOOT = 0.3048 Metre

  • Yard = 0.9144 Metre

  • Mile = 1.6093 Kilogram

  • Acre = 0.4047 Hectare

  • Pound = 0.4536 Kilogram

  • Degree Fahrenheit X 5/9 – 32 = Degree Celsius

  • Millimetre= 0.0394 Inch

  • Metre = 3.2808 Foot

  • Metre = 1.0936 Yard

Steel Tubes...Lighter and Stronger AISI 4130 -  steel. A low alloy steel is used in oil patch applications and used widely as an aircraft steel. 4130 is an oil and gas steel grade with a lower carbon content than 4140  giving 4130 improved weldability, the trade off is reduced through thickness strength. 4130 has a low resistance to corrosion. 4130 can also be used to make car connecting rods, shafts, fittings, and engine mounting lugs, bushes, gears, axles, bolts, gas cylinders, airframe components, hydraulic lines and nitrided machinery parts. Typical range of hardness is 90-96 Rockwell B.

The 41xx family of steel includes chromium and molybdenum and are often referred to as chromoly steel or chrome-moly. Chromoly steels have an excellent strength to weight ratio but do not contain sufficient quantities to provide the levels of corrosion resistance found in stainless steels. These steel are often used in aircraft parts also frequently used within the gas and oil industry also in Chassis of F car.

Approximate equivalents : 25CrMo4, DIN 1.7218, 30CrMo, 708A25, 708M25, 30CrMo, SCM430

• Formulae to Calculate weight of 4130 Tube or Pipe :

  • Weight of  S.S. Pipe : 

    • O.D. ( mm ) – W Thick ( mm ) X  W.Thick ( mm ) X 0.024866 = Wt. Per Mtr.

    • O.D. ( mm ) – W Thick ( mm ) X  W.Thick ( mm ) X 0.00756 = Wt. Per Mtr.

• For Tubing Selection in BAJA , SUPRA and other Competitions

  • Standard conversion factors

  • Inch = 25.4 Millimetre

  • FOOT = 0.3048 Metre

  • Yard = 0.9144 Metre

  • Mile = 1.6093 Kilogram

  • Acre = 0.4047 Hectare

  • Pound = 0.4536 Kilogram

  • Degree Fahrenheit X 5/9 – 32 = Degree Celsius

  • Millimetre= 0.0394 Inch

  • Metre = 3.2808 Foot

  • Metre = 1.0936 Yard