SAE J524 Seamless Cold Drawn Precision Steel Tube for Vehicle with ISO 9001 Certification
Quick Detail:
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:
O.D.:6-88.9mm
W.T.:1-15mm
L: According to customer Order
Applications: for Bending and Flaring to auto parts
Manufacture:
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 | 0.10 |
| Over 25.4 to 38.1 inclusive | 0.15 |
| Over 38.1 to 50.8 inclusive | 0.20 |
| 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
ASTM Publications:
ASTM A513 Electric-Resistance-Welded Carbon and Alloy Steel Tubing
ASTM A519 Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing
ASTM A450/ A-450M Standard Specifications for General Requirements for Carbon, Ferritic Alloy and
Austenitic Alloy Steel Tubing
ISO Publications:
ISO 3304 Plain end seamless precision steel tubes, technical conditions for delivery
ISO 5598 Fluid power systems and components - Vocabulary
ISO 8434-2 Metallic tube connections for fluid power and general use - Part: 2 37° flare fittings
ISO 8434-3 Metallic tube connections for fluid power and general use - Part: 3 ORFS fittings
ISO 10583 Hydraulic fluid power - Test methods for tube connections
ISO 10763 Hydraulic fluid power - Plain-end, seamless and welded steel tubes - Dimensions and
nominal working pressure.
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