SAE J526 Welded Steel Tubes

Welded Low-Carbon Steel Tubing Suitable for Bending,Flaring,Beading,Forming and Brazing

The SAE J526 Standard covers electric-resistance welded single-wall low-carbon steel pressure tubing intended for general automotive, refrigeration, hydraulic, and other similar applications requiring tubing of a quality suitable for bending, flaring, beading, forming, and brazing. Material produced to this specification is not intended to be used for single flare applications due to the potential leak path that would be caused by the ID weld bead. The material produced to this specification is intended to service pressure applications where severe forming and bending is not required. As this material may exhibit mechanical properties that reduce some desired forming characteristics versus SAE J356, the severity of the forming requirements of the finished assembly should be considered when utilizing material produced to this specification.
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Welded Low-Carbon Steel Tubing Suitable for Bending,Flaring,Beading,Forming and Brazing

The SAE J526 Standard covers electric-resistance welded single-wall low-carbon steel pressure tubing intended for general automotive, refrigeration, hydraulic, and other similar applications requiring tubing of a quality suitable for bending, flaring, beading, forming, and brazing. Material produced to this specification is not intended to be used for single flare applications due to the potential leak path that would be caused by the ID weld bead. The material produced to this specification is intended to service pressure applications where severe forming and bending is not required. As this material may exhibit mechanical properties that reduce some desired forming characteristics versus SAE J356, the severity of the forming requirements of the finished assembly should be considered when utilizing material produced to this specification.

WELDED HYDRAULIC TUBING

SAE J-526

SCOPE

This specification covers welded, single wall, low carbon steel, flash in tubing intended for general automotive, refrigeration, hydraulic and other similar applications requiring tubing of a quality suitable for bending, flaring, beading, forming and brazing.

TESTING

Tubing produced to this specification will be submitted to the following test procedures according to SAE J1677; Flattening Test, Flaring Test, Expansion Test, Hardness Test, Tensile Test, Pressure Proof Test, Bending Test and a Nondestructive Electronic Test.

TUBING OUTSIDE DIAMETER TOLERANCES
Nominal Tube OD
(Inches)
OD Tolerance
(+/- Inches)
Wall Thickness
(Inches) *
Wall Thickness
Tolerance
(+/- Inches)
1/8
.002
.025
.005
3/16
.003
.028
.005
1/4
.003
.028
.0030
5/16
.003
.028
.0030
3/8
.003
.028
.0030
7/16
.004
.030
.0030
1/2
.004
.030
.0030
1/2
.004
.035
.0035
9/16
.004
.030
.0030
5/8
.004
.035
.0035

* For intermediate wall thickness, the tolerance for the next heavier wall thickness shall apply.

MECHANICAL PROPERTIES
Properties
Values
Yield Strength (Min)
25,000 PSI
Tensile Strength (Min.)
42,000 PSI
Elongation in 2” (Min.)
14%
Hardness (Rockwell B) (Max)
65

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