SCOPE
This specification covers electric resistance welded, flash controlled,normalized, single wall, low carbon steel pressure tubing. It is intended for use in pressure lines and in other applications requiring tubing of a quality suitable for bending, double flaring, beading, forming and brazing. Material produced to this specification is not intended for single flare applications due to the potential leak path caused by the ID weld bead.

SAE J356 Type-A covers small diameter light wall tubing (typically 5/8” OD x 18Ga and under) that is “in line” annealed, as opposed to J356 where normalizing is performed as a separate operation. Type-A performance requirements are the same as for J356 tubes but the chemical composition ranges for Carbon and Manganese are broader. Type-A tubes are often produced in coil form although they can be cut and straightened through secondary operations.

TESTING
Tubing produced to this specification will be submitted to the following test procedures according to SAE J1677; Flatteneing Test, Flaring Test, Reverse Flattining Test, Expansion Test, Hardenss Test, Tensile Test, Pressure Proof Test and a Nondestructive Electronic Test.

SAE J356a is manufactured from a single strip of steel shaped into a tubular form by electric resistance welding. After welding, the inside flash is closely controlled by welding techniques or by cutting. Overall ductility and uniform grain structure is achieved by on-line annealing. This standard covers normalized electric resistance welded flash controlled single wall low carbon steel pressure tubing intended for use as pressure lines and in other applications requiring tubing of a quality suitable for bending, double flaring, beading, and brazing.
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