Alloy Round Mechanical Tubing

4140/42 and 4130 Mechanical Tubing are medium carbon alloy grades, which are widely used for many general-purpose applications that require high tensile strength and toughness. The addition of chromium and molybdenum as alloying elements, combined with heat treatment, provides the combined advantage of hardness, ductility, and strength.

4140 Meets ASTM A519 specifications and tolerances
4130 Meets ASTM A513 Type 5(DOM) or A519 (CDS) specifications and tolerances
4140 Alloy Tubing Tolerances

Stocked Size Range

  • (4130): 0.250” – 3.250” OD; 0.035” – 0.313” wall thickness
  • (4140): 3.000” – 19.000” OD; 0.500” – 3.000” wall thickness
  • Stocked in 17.000’ - 24.000’ random lengths (Cut to Length available)

Manufacturing Process

Depending on the grade and type, alloy tubing is either produced per ASTM A513 Type 5 or ASTM A519 industry standards.  See CDS, HRS, or DOM manufacturing processes per the specific type and specification for more information.

Benefits of Alloy Round Mechanical Tubing


Alloy Tubing has superior tensile strength and toughness.  It also provides a high strength to weight ratio.

Heat Treatable

Easily heat treatable to a broad range of strengths, machineabilities, and hardness’s.


Alloy tubing is an excellent candidate for most processing techniques where strength is required and allows for many options due to its available sizes produced.


4130 and 4140 alloy tubing is easiest of the common alloy grades to be machined, with a minimal stock allowance for clean-up. It has excellent machining characteristics and is a medium carbon alloy.

Wide Range of Sizes

Alloy tubing can be manufactured to a large range of OD and wall thickness dimensions due to it being rolled bar and pierced or cold drawn.

Applications By Industry

Construction & Heavy Equipment

  • Hydraulic Cylinders
  • Drilling Equipment
  • Augers
  • Gears
  • Bushings
  • Spacers
  • Axles
  • Bearings
  • Shafts


  • Hydraulic Cylinders
  • Augers
  • Booms
  • Shafts
  • Spacers
  • Bushings
  • Axles
  • Bearings
  • Rings


  • Rollers
  • Lift Components
  • Steel Mill Rolls
  • Paper Mill Rolls

Fluid Handling

  • Pumps
  • Other Components Which Liquids Will Flow (Especially at High Speeds)
  • Sleeves
  • Flanges
  • Swivels


  • Numerous Internal Machine Components
  • Back-up and Support Tooling
  • Fixtures
  • Wheels
  • Industrial Lift Components
  • Cylinders
  • Rollers
  • Tool Extensions

Oil & Gas

  • Drilling Equipment
  • Completion Equipment
  • Packers
  • Liner Hanger Components
  • Drilling Jars
  • Fishing Tools


  • Gears
  • Flanges
  • Waste Treatment,
  • Wind Turbine Components
  • Nuclear
  • Wind
  • Solar
  • Gas
  • Coal Plant Applications

General Fabrication and Machining

  • Size Specific Needs Supports
  • Machined Parts
  • Wear PartsFixtures
  • Mold Bases
  • Gears

Automotive & Transportation

  • Auto & Truck Axles
  • Control Arms
  • A-Arms
  • Chassis
  • Roll Cages
  • Aircraft Frames
  • Shafts (Drive, Half and Prop)
  • Bicycle Frames
  • Collars

Streamline your supply chain with high-quality Alloy Tubing from Industrial Tube & Steel. As a leading metals distributor for over 60 years, we have the inventory, resources, and capabilities to meet your material needs on time and within budget.

Contact us for more information.

Customized Cut Lengths Available. Please Specify Cut Length During Quote Process.

4140 & 4130 Alloy Tubing

Request A Quote For Addtional Questions