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