We also produce cold drawn and annealed seamless low carbon steel pressure tubing for hydraulic lines and other applications. Hoses meeting SAE J525 specifications are available in 20-foot lengths. From which the material is made.
Raw material was rolled flat using a weld mill. This material is dead soft when produced, making it easy to bend and flare during hydraulic fluid line applications. There are AISI classes 1008, 1010, 1020, and 1026. After a normalizing heat treatment, the tube is suitable for cold working
This standard specifies normalised electric resistance welded, cold-drawn, single-wall, low-carbon steel pressure tubes for pressure lines and other applications requiring flexibility, forming, and brazing.
SAE J525 Steel Tube is suitable for hydraulic applications and other applications that require tubing that can be bent and flared. We ship our tubes with capped ends to prevent contamination, and their ODs and IDs are exceptionally clean and bright.
We manufacture, supply, export, and distribute low carbon steel pipes and tubing. For hydraulic parts, we supply and stock welded tubing based on SAE J525 Steel Tube. There must be no thickness variation exceeding 10% when tubes are specified by their diameters (or inner diameters) and their nominal wall thicknesses.
Cold working must be performed after normalizing the tubing. The walls must be reduced by at least 8 percent in cold working, resulting in a minimum reduction of 15 percent. By cold-working the tubing, an annealed product will be produced that meets all specifications.
The hydraulic tube is made of welded low-carbon steel tubing that has been annealed for bending and flaring. Tubing of high quality for bending, flaring, forming, and brazing. Hydraulic components are used in heavy equipment, agriculture, off-road vehicles, automobiles, steering and transmission components, process and utility applications, etc.
Additionally, our J525 high-pressure tubing undergoes several cold-drawn reductions, intermediate anneals, and a dead-soft anneal after final sizing. Consequently, the tubing is consistently of high quality and easy to bend and flare.
Both J524 and J525 have similar chemical and mechanical properties. On the other hand, J525 is welded from flat stock. J524 Seamless is usually the best choice for flaring. In spite of this, both products are of high quality and have similar specifications.
OD x ID
.313”-4.25” outside diameter
.035”-.25” wall thickness
A section at least three inches in length shall be taken from every 1500 feet or less of finished tubing and shall be flattened between parallel plates to three times the wall thickness of the tube. The weld shall be placed at a point of 90 degrees from the direction of applied force. Any cracking or flaws revealed by this test shall be cause for rejection. Superficial ruptures resulting from minor surface imperfections shall not be cause for rejection.
A section at least four inches in length shall be taken from every 1500 feet or less of finished tubing and split longitudinally 90 degrees on each side of the weld and the sample opened and flattened. There shall be no evidence of cracks or lack of penetration or overlaps resulting from flash removal in the weld.
EXPANSION TEST — A suitable specimen shall be taken from every 1500 feet or less of tubing and subjected to an expansion over a plug. The outside diameter must be expanded 25 percent throughout a length equal to the outside diameter of the tubing or one inch, whichever is greater. There shall be no evidence of cracking in this test.
Tubing supplied under this specification shall have been hydrostatically tested at a fibre stress of 20,000 psi or at an actual pressure of 5,000 psi, whichever is less, based on the applicable minimum wall, or tested by use of a non-destructive electrical test approved by the purchaser.
When tubing is specified by outside diameter and inside diameter, the tolerances shown in the table shall apply.
Tolerances for the specified outside diameter (or inside diameter) and the nominal wall thickness shall apply to tubing specified by outside diameter (or inside diameter) and nominal wall thickness.
This chart shows the nominal pressure ratings for tubing products based on SAE J525 Steel Tube. These pressure ratings were calculated using the Lame formula with 12,500 PSI (86MPa) stress factors and a 4:1 design factor. The SAE J533 recommends 37 degrees of single flaring for tubing with a normal wall thickness for the wall thicknesses shown in bold.
A variety of factors determine whether hydraulic systems perform satisfactorily at different pressures. Neither the values listed below should be construed as standards or specifications. Equivalent specifications for SAE J525 steel tubes
ASTM /ASME A214 (Except for Average Wall)