J524 Seamless Low Carbon Steel Tubing Annealed for Bending and Flaring SAE J524 Seamless Cold Drawn Precision Steel Tube for Vehicle China Precision Steel Tube leading supplier, choose the high quality
Hydraulic Precision Steel Tube,
Precision Carbon Steel Tube,
Precision Seamless Steel Tube,
CDS Steel Tube,
CDW Steel Tube Automotive tubing J524 tubing Size range:
External diameter: 6-88.9mm
Wall thickness: 1-15mm
Length: According to customer Order
Standard: SAE J524 Seamless Steel Tubing
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 | 0.1 |
| 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% |
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 | 0.3 |
| Hardness ( Rockwell B),max | 65 |
Good surface for both OD and ID, very good smoothness Ra ≤0.8μm
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 standards:
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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