SAE J524 hydraulic DOM Seamless Tubing

Instruction

Quick Detail:
Technical Standard:  SAE J524 Seamless Steel Tubing                          
J524 Seamless Low Carbon Steel Tubing Annealed for Bending and Flaring        
 
SAE J524 Seamless Cold Drawn Precision Steel Tube for Vehicle
                   
Size range for SAE J524 hydraulic tubing:
O.D.:6-88.9mm   
W.T.:1-15mm    
L: According to customer Order    
 
Applications:  for Bending and Flaring to auto parts        

Manufacture for J524 tubing:
The tubing is cold drawn size and after forming shall be annealed in such a manner as  to produce finished product which meet the SAE J524 requirement and customer's requirement.

 

DIMENSIONS AND TOLERANCES

Table 1- TUBING OUTSIDE DIAMATER TOLERANCE
Nominal Tubing OD mm	Tolerance  ±mm
Up to 25.4	0.1
Over 25.4 to 38.1 inclusive	0.15
Over 38.1 to 50.8 inclusive	0.2
Over 50.8 to 88.9 inclusive	0.25
WT tolerance shall be not more than 10%

 

Material:  
Tubing made from low-carbon steel confirming to the following chemical composition.

Table 2- CHEMICAL REQUIREMENTS
Element	%
Carbon	0.18 max
Manganese	0.30  to 0.60
Phosphpris	0.040 max
Sulfur	0.050 max

 

MECHANICAL PROPERTIES:
The finished tubing have mechanical properties of following table:

Table 3- MECHANICAL PROPERTIES
Properties	Value
Yield Strength,min	170 Mpa
Ultimate Strenth,min	310 Mpa
Elongation in 50mm, min	30%
Hardness ( Rockwell B),max	65.00

 

 

 

 

Quality:
Lengths of finished tubing is reasonably straight and have smooth ends free from burrs.
Tubing is 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 tolerance specified for diameter and wall thickness.
The removal of such surface imperfections is not required.
 
PERFORMANCE REQUIREMENTS:
The finished tubing satisfactorily meet the following performance tests in SAE J1677
Flattening test
Flaring test
Reverse Flattening test
Expansion Test
Hardness Test
Tensile Test
Elongation Test
Pressure Proof Test
 
SAE PUBLICATIONS FOR RELATED STNADARDS:
 
SAE J409    Product Analysis - Permissible Variations from Specified Chemical Analysis of a Heat or Cast
                      Cast of Steel
SAE J1677  Test and Procedures for Steel and Copper Nickel Tubing
 
SAE J514    Hydraulic Tube Fittings
 
SAE J533    Flares for Tubing
 
SAE J1065  Norminal Reference Working Pressure for Steel Hydraulic Tubing
 
SAE J1453  Fitting - O Ring Face Seal
 
SAE J2551  Recommended Practices for Fluid Conductor Metallic Tubing Applications
 
SAE J2592  Carbon Steel Tubing for General Use - Understanding Nondestructive Testing for Carbon
                     Steel Tubing
 
SAE J2658  Metallic Tube Conductor Assemblies for Fluid Power and General Use - Test Methods
                      for Hydraulic Fluid Power Metallic Tube Assemblies