As an industry leader in the production of SAE J524 seamless Pipe, supplies high quality cold drawn seamless and hot finished seamless pipe. In the cold draw process, dimensional accuracy, microstructure uniformity, and superior surface finish are closely controlled, making the tubing an excellent choice for applications requiring high pressure, high temperature, and extreme stress. Our chrome-moly products are excellent for applications that require a high strength-to-weight ratio.

Along with round, square, rectangular, and hexagon shapes, we offer a wide range of specialty profiles, such as cloverleaves, streamlines, and lemons, which can be configured to suit your individual needs. We are able to meet the exact requirements of our customers by sourcing both standard and specialty grades of materials through our vast network of mill suppliers. We can cut-to-length tubes with an outside diameter of 0.250″ to 11.000″ and a wall thickness that varies from 0.028″ to 1.187″. A long list of international standards can be met with tubes, including ASTM, SAE, EN, DIN, and JIS.

Cold drawn tubing offers superior machinability, better tolerances, and greater strength compared to hot finished products, making it an excellent choice for many demanding applications. Our exceptional capabilities can be found in the table below. Feel free to contact us if you have questions.

Its flaring and bending properties make SAE J524 seamless Tubing especially suitable for flaring and bending. Seamless Low Carbon Steel tubing that is Cold Drawn and Annealed for use in hydraulic lines. As a result, some industrial uses include Aircraft, Locomotive, Heavy Equipment, Automotive, and Agricultural applications. Therefore, SAE J524 seamless is a perfect choice where fittings, couplings, and fluid lines are used. As a further measure of cleanliness and prevention of contamination, all of our tubes ship with sealed ends SA179


  • SAE J524 Seamless
  • AMS5050K
  • AISI 1008/1010
  • ASTM/ASME A/SA179 except for average wall, aluminum killed steel
  • EN10204 3.1.B
  • PED certified
  • OD x ID
  • Uniform Lengths
  • Dual Certified

A particular feature of our SAE J524 seamless is that it is available both as ERW (Electric Resistance Welded). All our tubing is manufactured to ensure a clean ID, a requirement for most hydraulic applications. Notably, our seamless hydraulic fluid line metallurgical composition is cold drawn 1010 steel which meets AMS 5050-G, JIC specs, ASTM A-179, and SAE J524 seamless


  • Uniform ductile tubing ideal for easy flaring and bending
  • Smooth clean inside surface helps prevent damage to valves and cylinders
  • Hydraulic applications like diesel fuel injection, lubrication, generator pump, coil, air conditioner, and similar high-pressure applications
  • Unlike 4130 Seamless Alloy Steel Tubing, SAE J524 seamless is easily bent and flared
  • All material is dead soft annealed and drawn
  • Typical applications such as fittings, couplings, and fluid lines

As a result of multiple cold-drawn reductions, annealing both intermediate and after final tubing sizing, our SAE J524 seamless tubing has a high quality finish both inside and out. However, when handling tubing special care should be given not to drag, scratch or accidentally gouge since those imperfections may compromise tubing and cause leaks.

Solitaire Overseas stocks SAE J524 seamless tube intended for use as hydraulic lines and in other applications requiring tubing a quality suitable for flaring and bending.Seamless Hydraulic Tubing (SAE J-524) covers cold drawn and annealed seamless low carbon steel pressure tubing intended for use as hydraulic lines and in other applications requiring tubing of a quality suitable for flaring and bending. All material is dead soft annealed and drawn. Has uniform ductility and a smooth clean inside surface

Seamless hydraulic tubing is produced as a SAE J524 seamless by rolling and piercing bar stock. It then gets multiple cold-drawing reductions before a final cold draw guarantees tight dimensional tolerances and excellent surface finish. After final sizing of the tube through cold drawing it undergoes intermediate annealing and a dead-soft annealing process to meet SAE J524 seamless requirements. The Solitaire Overseascovers cold drawn and annealed seamless low-carbon steel pressure tubing intended for use as hydraulic lines and in other applications requiring tubing of a quality suitable for flaring and bending.

SAE J524 seamless Dimension Tolerances

SAE J-524 Seamless (AMS 5050) Seamless Hydraulic Tubing Dimension Tolerances
When tubing is specified by outside diameter and wall, the tolerances shown in the table shall apply.
  Nominal Outside Diameter (Inch) Wall (%)
Up to 3/8 ±0.003 ±15%
Over 3/8 to & incl. 1/2  ±0.003 ±10%
Over 1/2 to & incl. 1-1/2  ±0.005 ±10%
Over 1-1/2 to & incl. 2-1/2    ±0.010 ±10%

Chemical Composition (% by weight)

Carbon 0.18 maximum
Manganese 0.30 – 0.60
Phosphorus 0.040 maximum
Sulphur 0.050 maximum

Mechanical Properties

Tensile Strength 45,000 psi minimum
Yield Strength 25,000 minimum
Elongation in 2 inch 35 percent* minimum
Rockwell Hardness B65 maximum
*For tubes with an OD of 3/8 inch and less and wall thickness of 0.035 inch and less, a minimum elongation of 30 percent is permitted.

Flattening Test

A three inch section cut from the tubing shall not crack or show any flaws when flattened between parallel plates to three times the wall thickness of the tube.

Expansion Test

Expansion Test
A section of tube approximately four inches in length with the ends burred shall withstand being expanded at one end over a polished tapered mandrel having an included angle of 60 degrees until the actual average inside diameter is increased 30 percent.  The expansion test shall be made in a die in order to restrict the expansion of 30 percent. The axis of the mandrel should be parallel to the axis of the tube during the expansion tests.

Hydrostatic Test

Tubing supplied under this specification shall have been tested at not less than 1,000 lbs. hydrostatic pressure or higher in case working conditions require.

Manufacturing Quality

Tubing shall be free from defects and in accordance with the best commercial practice.

Production Process

ERW/Seamless tube and Cold Drawing or Cold Rolling Production DOM Tube

Standard SAE J524
Material J524 Low Carbon Steel
Size WT: 1-15mm; OD: 6-88.9mm; Length: Customer’s Requirements
Applications For Bending and Flaring to auto parts
Test Tension Test, Flaring Test, Flange Test, Reverse Test, Hardness Test, Hydrostatic or Nondestructive Electric Test etc
Advantage Cutting For Customer Good Packing with Pallet Better Concentricity

Countries We Supply to

Oman, Iran, Finland, Jordan, Ecuador, Tibet, Nigeria, Malaysia, Italy, Hong Kong, United Kingdom, Venezuela, Algeria, Namibia, Croatia, Poland, Gabon, Iran, Norway, Azerbaijan, Iraq, Mexico, Egypt, Argentina, Pakistan, Lithuania, Bhutan, Costa Rica, China, Colombia, Peru, Thailand, Ukraine, Singapore, Japan, South Korea, New Zealand, Morocco, Kenya, Belarus, Brazil, Turkey, Kazakhstan, Hungary, Germany, United States, Vietnam, Sri Lanka, Ireland, Czech Republic, India, Gambia, United Arab Emirates, Lebanon, Mongolia, Portugal, Nigeria, Bahrain, Kuwait, Yemen, Romania, Indonesia, Chile, Nepal, Ghana, Saudi Arabia, France, Taiwan, Qatar, Denmark, Austria, Afghanistan, Spain, Mexico, Belgium, Puerto Rico, Slovakia, Serbia, South Africa, Chile, Bangladesh, Libya, Greece, Russia, Switzerland, Trinidad & Tobago,Tunisia, Bulgaria, Estonia, Canada, Bolivia, Sweden, Poland, Australia, Philippines, Angola, Israel, Zimbabwe, Macau, Netherlands.

Countries We Export To

Kuwait, Bolivia, Peru, Pakistan, Brazil, Bhutan, Nepal, Canada, Kazakhstan, Trinidad & Tobago,Tunisia, Israel, Lithuania, Argentina, Belarus, Yemen, Ghana, Switzerland, Belgium, Nigeria, Gambia, Spain, Sri Lanka, Vietnam, Oman, Finland, Egypt, Mexico, Mongolia, Sweden, Norway, Morocco, Saudi Arabia, Gabon, Algeria, South Africa, Germany, Bulgaria, Iran, South Korea, Qatar, Estonia, Costa Rica, Azerbaijan, Iran, Hong Kong, United States, Greece, Russia, Iraq, Kenya, Malaysia, Taiwan, Bahrain, Netherlands, Angola, Zimbabwe, Lebanon, Tibet, Colombia, Italy, New Zealand, Philippines, Namibia, Poland, Chile, France, Romania, Serbia, Indonesia, Australia, Turkey, India, Ecuador, Slovakia, Hungary, Chile, Bangladesh, Denmark, Singapore, Czech Republic, Ireland, United Kingdom, Venezuela, Libya, Mexico, Japan, Austria, Afghanistan, Ukraine, Puerto Rico, Croatia, United Arab Emirates, Poland, Macau, Portugal, Nigeria, Thailand, China, Jordan.