Project Description

ASTM A213 / A213M T11 T12 T22. Seamless Alloy Steel Boiler, Superheater, and Heat-Exchanger Tubes

ASTM A213 / A 213M, ASME SA213 T11, T12, T22, T2, T5, T5b, T5c, T9, T91 is the standard applicable to seamless alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.

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ASTM A213 / A213M ASME SA213 tubes shall be made by the seamless process and shall be either hot-finished or cold finished as specified.

ASTM A213 / A213M covers several grades of minimum- wall-thickness, seamless, alloy-steel, boiler and superheater tubes.

ASTM A213 / A213M tubing sizes and thicknesses usually furnished to this specification are 1⁄8 in. [3.2 mm] in inside diameter to 5 in. [127 mm] in outside diameter and 0.015 to 0.500 in. [0.4 to 12.7 mm], inclusive, in minimum wall thickness or, if specified in the order, average wall thickness. Tubing having other diameters may be furnished, provided such tubes comply with all other requirements of this specification.

Standard: ASTM A213 / A213M, ASME SA213.

Description Name: ASTM A213 / ASME SA213 T11 Seamless tubes, ASTM A213 / ASME SA213 T12 Seamless tubes, ASTM A213 / ASME SA213 T22, Seamless alloy tubes, ASTM A213 T11 Superheater tubes, ASTM A213 T12 Superheater tubes, ASTM A213 T22 Superheater tubes, ASTM A213 T11 boiler tubes, ASTM A213 T22 boiler tubes, ASTM A213 T12 boiler tubes, Seamless superheater tubes, Boiler tubes.

Size: 3.2 to 127 mm.

Wall Thickness: 0.4 to 12.7mm.

Shape: Round.

Length: Single random length/ Double random length or as customer’s actual request.

Grade: T11, T12, T22.

Referenced Documents:

ASTM A1016 / A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless-Steel Tubes.

Chemical Composition:

Chemical Components (%)









Heat Treatment Requirements


UNS NumberHeat Treat Type

Subcritical Annealing or Tempering Temperature, Min or range °F [ °C ]



full or isothermal anneal normalize and temper

1200 [650]



full or isothermal anneal normalize and temper subcritical anneal

1200 to 1350

[650 to 730]



full or isothermal anneal normalize and temper

1250 [675]

  • Tensile Requirements and Hardness:

Mechanical Properties




Strength (Mpa)

Strength (Mpa)(%)








  • Flattening Test – One flattening test shall be made on specimens from each end of one finished tube, not the one used for the flaring test, from each lot.
  • Flaring Test – One flaring test shall be made on specimens from each end of one finished tube, not the one used for the flattening test, from each lot.
  • Hydrostatic or Nondestructive Electric Test – Each tube shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order.

Materials and Manufacture:

  • The Steel shall be killed.
  • The Tubes shall be made by the seamless process and shall be either hot-finished or cold finished, as specified.
  • Heat Treatment – Ferritic Alloy and Ferritic Stainless Steels – The ferritic alloy and ferritic stainless steels shall be reheated for heat treatment in accordance with the requirements of Standard. Heat treatment shall be carried out separately and in addition to heating for hot forming.


  • Mill test certificates will be issued according to EN10204.3.
  • All tubes shall be supplied as per applicable ASTM A213 / A213M Specification.

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ASTM A213 T11 Bundles

ASTM A213 T11 Bundles

Packing and Marking

  • Packed in bundles or ply wooden box wrapped in plastic, and suitably protected for sea-worthy delivery or as requested.
  • Marking prescribed in Specification A1016 / A1016M, the marking shall include whether the tube is hot-finished or cold-finished and including not limited: Standard, graded, size, heat no. lot no.

Packing Photos:

ASTM A213 T11 Sea-worthy package

ASTM A213 T11 Sea-worthy package

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