ASTM A500 Structural Steel Pipe and Tubing


ASTM A500 is a specification for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. It covers several grades of carbon steel tubing, including Grade A, Grade B, Grade C, and Grade D. It has a wide range of engineering applications requiring strength and ductility.

The ASTM A500 specification is commonly used for structural applications in construction, engineering, and other industries. The tubing is produced in both welded and seamless forms.

Material Composition

GradeUNSComposition (% by weight in heat)Minimum strength requirements
CMnPSCutensileyield (round)yield (shaped)elongation
max %max %max %max %min %MPa (ksi)MPa (ksi)MPa (ksi)%
AK030000.261.350.0350.0350.2310 (45)230 (33)270 (39)25
BK030000.261.350.0350.0350.2400 (58)290 (42)315 (46)23
CK027050.231.350.0350.0350.2425 (62)315 (46)345 (50)21
DK030000.261.350.0350.0350.2400 (58)250 (36)250 (36)23
Chemical Composition Table
ASTM A500 Structural Steel Pipe and Tubing
ASTM A500 Structural Steel Pipe and Tubing

Manufacturing Process

Seamless tubes are cold drawn/finished from hot extruded billets while welded tubing uses cold formed strip or plate and electric fusion welding. Rigorous NDT tests verify joint strength.

Key Applications

Structural tubular framework, machine tooling supports, guardrails, ladders where load is applied along the tube axis. Also used in conveyor rollers, lighting poles and oil rigs.

Available Sizes and Grades

ASTM A500 tubing is available in various sizes and wall thicknesses to suit different applications. It is commonly used in structural steel construction, including buildings, bridges, and other load-bearing structures. The tubing can be easily welded, bent, and fabricated, making it versatile for a range of design and construction requirements. >View the specification table

Testing and Quality

Rigorously evaluated through hydrostatic testing, dimensional checks and chemical analysis as per ASTM A500 specifications to ensure consistent high quality for safe structural use.

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Please contact us for technical consultation on specifications, fabrication requirements or supplies of A500 tubing. Our experts can assist with material selection and ensure code compliance for your application requirements.

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