SAE J524 Seamless Low-Carbon Steel Tubing Annealed for Bending and flaring

1. Description:

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.

2. Manufacture

The tubing shall be cold drawn to size and after forming shall be annealed in such a manner as to produce a finished product which will meet all requirements of SAE J524

3. Dimensions and Tolerances

The tolerances applicable to tubing outside diameter are shown in Table 1.
The wall thickness shall not vary more than ±10% for tubing having 12.7 mm or larger, nominal inside diameter
nor more than ±15% for tubing having a smaller nominal inside diameter. Tubing outside diameter and wall thickness shall be as specified by purchaser

4. Quality

Lengths of finished tubing shall be reasonably straight and have smooth ends free from burrs.
Tubing shall be free from scale and injurious defects and have a workmanlike finish. Surface imperfections such as handling marks, die marks, or shallow pits shall not be considered injurious defects provided the imperfections are within the tolerances specified for diameter and wall thickness. The removal of such surface imperfections is not required.

5. Material

Tubing shall be made from low-carbon steel conforming to the following chemical composition as shown in Table 2.

Performance Requirements

The finished tubing shall satisfactorily meet the following performance tests. All tests are to be conducted in accordance with the procedures in SAE J1677.

7.1. Flatten Test

7.2. Flaring Test

7.3. Expension Test

7.4. Pressure Proof Test

7.5. Nondestructive Electronic Test

8. Cleanliness

The inside of tubing shall be clean and free from any contamination that cannot be readily removed by cleaning agents normally used in manufacturing.

9. Corrosion Protection

The inside and outside of the finished tubing shall be protected against corrosion during shipment and normal storage. If a corrosion preventive compound is applied, it shall be such that after normal storage periods it can readily be removed by cleaning agents normally used in manufacturing. Extended corrosion resistance coatings, such as tern coating, galvanizing, epoxy paint, etc., are available and can be supplied at the request of the user

10.  Packaging of  DIN2391 St37.4 Material Cold Drawn Carbon Seamless Pipe   

Tubes are packed in round or hexagonal bundles with weight max.1000 kg. Other possibilities by agreement