J356 Tube

SAE J356 Type-A tubing is also covered by this specification. Standard SAE J356 and SAE J356 Type-A have the same mechanical properties and performance requirements. Despite the differences between Type-A tubing and SAEJ356 tubing, Type-A tubing is not inferior to SAEJ356 tubing. 

In this standard, small-diameter, light-weight wall sizes are recognized (typically 15.88 mm OD x 1.24 mm wall and smaller). Type-A SAE J356 tubing differs from Type-B SAE J356 tubing in the following ways. To relieve stress, type A tubing is usually coiled and heat-treated in-line.

Straight Type-A tubing can only be produced by secondary straightening and cutting operations when it is produced in coil form. SAE J356 straight lengths are produced and then normalized. Unless otherwise specified, Type-A tubing must meet all SAE J356 requirements. Type-A is also available in standard SAE J356 sizes, in which case all SAE J356 specifications apply.

Type-A SAE J356 covers small diameter, light wall tubing (typically 5/8″ OD x 18Ga and below), as opposed to J356, which is annealed separately. Tubes of Type-A must meet the same performance requirements as tubes of Type-J356, but their carbon and manganese ranges are wider. The Type-A tubes are often produced in coil form, but they can be cut and straightened after they have been made.

This specification covers electric resistance welded, flash controlled, normalized, single wall, low carbon steel pressure tubing. This tubing is suitable for bending, double flaring, beading, forming, and brazing in pressure lines and other applications. Single flare applications are not possible with this material because of the ID weld bead.

Unlike J356, which is annealed separately, SAE J356 Type-A covers small diameter, light wall tubing (typically 5/8″ OD x 18Ga and under). Type-A tubes have a wider range of carbon and manganese than J356 tubes. The carbon and manganese ranges for Type-A tubes are wider than those for Type-J tubes. Besides being produced in coil form, type-A tubes can also be cut and straightened.

SAE J356 Type-A tubing is also covered by this specification. SAE J356 Type-A and Type-B have the same mechanical properties and performance requirements. There are nominal reference working pressures listed in ISO 10763 for metric tubing and SAE J1065 for inch tubing according to SAE J356 or SAE J356 Type-A. After secondary heat treatment, SAE J356 is produced in straight lengths. SAE J356 Type-A tubing is heat treated in-line to relieve stress.

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