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Pipes & Tubes · ASTM A554 / EN 10219

Rectangular Tube — ASTM A554 / EN 10219

Rectangular tube — rectangular hollow section. Rectangular tube is used for frames, supports and architectural work.

  • ASTM A554 / EN 10219
  • 20 grades
  • EN 10204 3.1 / 3.2

Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026

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What is a rectangular tube?

Short answer

A rectangular tube is rectangular hollow section. Rectangular tube is used for frames, supports and architectural work.

Standards for rectangular tubes

DimensionsASTM A554 / EN 10219
Material — stainlessASTM A312 · tube ASTM A269 / ASTM A213
Material — duplexASTM A790 · tube ASTM A789
Material — nickel alloysASTM B423 (825) · ASTM B444 (625) · ASTM B622 (C276)
Material — carbon & Cr-MoASTM A106 · ASTM A333 · ASTM A335
CertificateEN 10204 3.1, or 3.2 with third-party inspection

Rectangular Tube: What to Know Before Ordering

  • Rectangular hollow section
  • Polished or mill finish
  • Cut lengths
Line drawing of a rectangular tubeLine drawing of a rectangular tube ODWT L — random / cut lengthbevel 37.5° (BE) or plain end
TYPE · RECTANGULAR TUBEDIM · ASTM A554 / EN 1021920 GRADESKANAK STEEL

Rectangular Tube Materials & Grades

GradeMaterial standardBest for
Inconel 825 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureSulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas
SS 904L rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureDilute sulphuric acid, phosphoric acid and chloride-bearing cooling water
SS 304 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureGeneral corrosion resistance, food, water and architectural work
SS 304L rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureWelded tanks, piping and vessels in general corrosive service
SS 310 / 310S rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureFurnaces, burners and heat treatment at high temperature
SS 316 / 316L rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureChloride-bearing process fluids, marine air and pharmaceutical service
SS 321 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureHigh-temperature service between 425 and 815 °C
SS 347 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureWelded high-temperature piping in refineries and power plants
Duplex 2205 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureStrength with chloride resistance at a stainless-steel budget
Super Duplex 2507 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureSeawater and high-chloride service where strength also matters
Inconel 600 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureHigh-temperature oxidation, caustic and nuclear service
Inconel 625 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureSeawater, high strength and high temperature in one alloy
Inconel 718 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureVery high strength at temperatures up to about 650 °C
Incoloy 800 / 800H / 800HT rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureFurnaces, petrochemical heaters and high-temperature piping
Hastelloy C276 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureThe most aggressive mixed acids, wet chlorine and hypochlorite
Hastelloy C22 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureMixed oxidising and reducing acids, and weld overlays
Monel 400 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureSeawater, hydrofluoric acid and marine service
Super Duplex S32760 rectangular tubeASTM A554 (ornamental) · A312 / A790 for pressureSeawater firewater, injection and offshore piping
S275JR rectangular tubeEN 10219 square & rectangular sectionsGeneral structures, frames and fabrication
S355J2+N rectangular tubeEN 10219 square & rectangular sectionsHeavy structures, cranes and offshore frames

Other pipes & tubes

Seamless pipePipe made without a weld seam, by piercing and drawing.Welded pipePipe formed from plate or strip and welded along its length.Round tubeTube ordered by exact OD and wall thickness.Square tubeSquare hollow section.Capillary tubeSmall-bore tube for instruments and medical use.

Rectangular tube — questions buyers ask

What is a rectangular tube?

A rectangular tube is rectangular hollow section. Rectangular tube is used for frames, supports and architectural work.

Are rectangular tubes structural?

In carbon steel they follow EN 10219 / 10210 for structures; stainless versions are mostly ornamental to ASTM A554.

Which grades are rectangular tubes available in?

Inconel 825, SS 904L, SS 304, SS 304L, SS 310 / 310S, SS 316 / 316L, SS 321, SS 347, Duplex 2205, Super Duplex 2507, Inconel 600, Inconel 625, Inconel 718, Incoloy 800 / 800H / 800HT, Hastelloy C276, Hastelloy C22, Monel 400, Super Duplex S32760, S275JR, S355J2+N.

Which standard covers rectangular tube dimensions?

ASTM A554 / EN 10219. The material standard depends on the grade.

Reviewed by the technical team, Kanak Steel & Engineering Co.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026
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