What is ASTM A554 Stainless Steel Tubing?

ASTM A554 Stainless Steel Tubing is welded mechanical tubing manufactured for applications where appearance, mechanical properties or corrosion resistance is important. Unlike pressure-piping specifications, ASTM A554 is primarily intended for mechanical, structural, ornamental and related applications.

The specification covers welded tubing produced from flat-rolled stainless steel using an automatic welding process without the addition of filler metal. The tubing may be supplied in round, square, rectangular or special shapes, depending on purchaser requirements.

The appropriate ASTM A554 grade, shape, dimensions, surface condition and manufacturing condition should be selected according to the intended application, mechanical requirements, corrosion environment and purchase specification.

ASTM A554 specifies requirements for welded stainless steel mechanical tubing used where appearance, mechanical properties or corrosion resistance is required. The specification covers tubing manufactured from stainless steel flat-rolled material and supplied in different shapes and manufacturing conditions.

Other sizes and grades may be supplied when agreed between the manufacturer and purchaser. Actual dimensions, tolerances, grade requirements and supply condition should always be confirmed against the applicable ASTM A554 edition and purchase specification.

ASTM A554 includes stainless steel grades from different metallurgical families. The following are common ASTM A554 grades used for mechanical, architectural, structural and related tubing applications. This table is not intended to represent the complete grade list of the specification.

ASTM A554 also covers additional grades. Grade selection should be based on the required corrosion resistance, mechanical properties, fabrication requirements, operating environment and applicable project specification.

ASTM A554 stainless steel mechanical tubing can be supplied in different cross-sectional shapes according to the application and purchaser requirements. Surface finishes are addressed separately from tube shape.

Surface finish is an important selection factor for ASTM A554 stainless steel tubing, particularly in architectural, ornamental and visible applications. Finish terminology such as polished, brushed, satin and mirror is commonly used commercially and should be specified according to the required surface appearance and purchaser requirements.

Specific polishing grit, surface roughness or finishing requirements should be stated in the purchase order because commercial finish terminology does not necessarily represent a separate ASTM A554 grade or classification.

ASTM A554 establishes grade-specific chemical composition requirements. The table below presents selected elements for commonly referenced grades. It is provided for general comparison and should not be treated as a complete chemical analysis for every ASTM A554 grade.

* For MT-304L and MT-316L, ASTM requirements include additional carbon considerations for small-diameter or light-wall tubing where multiple drawing passes are required. The complete chemical composition should be checked against the applicable ASTM A554 edition and material test certificate.

Mechanical property requirements under ASTM A554 vary according to the grade and applicable material condition. Tensile strength, yield strength and elongation are important when selecting mechanical tubing for structural, fabrication and mechanical applications.

Mechanical properties can depend on the grade and applicable manufacturing condition. Final acceptance should be based on the requirements of the applicable ASTM A554 edition and the material test certificate supplied with the tubing.

ASTM A554 grades can be compared with commonly recognized UNS and Werkstoff numbers. These references are provided for material identification and comparison and should not be treated as automatic one-to-one substitutes for the ASTM specification.

ASTM A554 mechanical tubing is available in a wide range of outside dimensions and wall thicknesses. The following are representative sizes commonly supplied for mechanical and architectural applications. Actual availability depends on grade, shape, manufacturing condition and customer requirements.

ASTM A554 covers tubing up to 16 in. (406.4 mm) outside dimension with wall thicknesses of 0.020 in. (0.51 mm) and over, while other sizes may be supplied by agreement between the manufacturer and purchaser. The representative dimensions above should therefore not be interpreted as the complete ASTM A554 dimensional range.

Dimensional tolerances are important for ASTM A554 mechanical tubing, particularly in architectural fabrication, structural assemblies and precision mechanical applications. Tolerances depend on the tube dimension, shape and applicable requirements of the ASTM specification.

For precision applications, the required outside dimension, wall thickness, length, straightness and shape tolerances should be specified in the purchase order and verified during dimensional inspection.

ASTM A554 stainless steel mechanical tubing is used across architectural, structural, automotive, furniture, industrial and general fabrication applications. The appropriate grade is selected according to corrosion resistance, mechanical requirements, appearance and service environment.

1. What is ASTM A554? 2. What is ASTM A554 tubing used for? 3. Is ASTM A554 suitable for pressure applications? 4. What grades are available under ASTM A554? 5. What shapes are available in ASTM A554 tubing? 6. What surface finishes are available? 7. Is ASTM A554 corrosion resistant? 8. Why buy ASTM A554 tubes from Kamal Steels? Request Latest Price