SAE J525 Welded Hydraulic Tubing is a versatile low-carbon steel tubing designed for various hydraulic applications. The tubing is specifically annealed to facilitate bending and flaring, making it suitable for use in pressure lines where high-quality tubing is essential. Its applications span across industries such as Heavy Equipment, Agriculture, Off-Road Vehicles, Automotive, Steering and Transmission components, Process and Utility, and other Hydraulic systems.

 

The manufacturing process of J525 high-pressure tubing involves multiple cold-drawn reductions, intermediate anneals, and a final dead-soft anneal after sizing. This meticulous sequence ensures high-quality tubing with consistent mechanical properties, optimal strength, and dimensional accuracy. Each cold-drawn reduction enhances tensile strength and hardness, while intermediate annealing restores ductility and relieves stresses. Sizing operations achieve precise dimensions, and the final dead-soft anneal ensures uniform microstructure and ease of bending and flaring without cracking. Stringent quality control, including dimensional inspection, mechanical testing, and non-destructive testing, guarantees that the tubing meets stringent standards, making it ideal for high-pressure applications.

 

Similar to J524, J525 shares common chemical and mechanical properties and finds application in hydraulic systems. The primary distinction lies in the fact that J525 is welded from flat stock. For applications where flaring is a requirement, J524 Seamless tubing is typically preferred. Nevertheless, both J524 and J525 exhibit high quality and comparable specifications.

 

Key specifications for SAE J525 include conformity to SAE J-525 standards, as well as adherence to ASTM A-214 (Except Average Wall), ASME SA-214 (Except Average Wall), Addenda EN10204 3.1.B, PED Certification, and dual certification as Fluidline. The tubing is available in uniform lengths and is characterized by its OD x ID dimensions, providing consistency and reliability.

 

 

Element	%
Carbon	0.06-0.18
Manganese	0.30 to 0.60
Phosphprus	0.040 max
Sulfur	0.050 max

 

 

Properties	Value
Yield Strength,min	170 Mpa
Ultimate Strength,min	310 Mpa
Elongation in 50mm, min	0.35
Hardness ( Rockwell B),max	65

 

SAE J525 Welded Hydraulic Tubing is a specification for welded and cold-drawn carbon steel tubing commonly used in hydraulic and pneumatic systems due to its ability to withstand high pressures. The tubing is manufactured through a welding process that ensures a strong seam, followed by cold drawing to enhance strength and surface finish, providing precise dimensions and a clean surface. It is available in various sizes with specific outer diameter and wall thickness combinations, meeting tight tolerances for compatibility with hydraulic components. The standard also ensures the tubing meets essential mechanical properties, including tensile strength, yield strength, and elongation.