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ASTM A213 T11 tube is a boiler grade stainless steel tube made of
different material grades. These tubes are used in heat exchangers,
superheaters and boilers. The quality of the pipes makes them
suitable for high temperature service. ASME SA213 T11 seamless pipe
is composed of carbon, manganese, phosphorus, sulfur, silicon,
nickel, chromium and molybdenum. The composition provides the
material with high tensile strength, high yield strength and high
Brinell number.
T11 boiler tubes can be hot worked or cold drawn. It can also be
seamless, ERW, welded or fabricated. In most cases, ASTM A213 T11
pipe is highly resistant to high temperatures and has high
corrosion resistance. The ductility of the material also allows for
machining operations such as flanging, bending, etc. T11 Tubes also
offer fusion welding, so they can be used in industries such as
power generation and petrochemicals. Our ASTM A213 T11 pipes are
made of the highest quality materials and perform better in high
temperature and high pressure conditions. If you have any questions
about ASTM A213 Gr T11 requirements, please feel free to contact us
| Specifications | ASME SA213, ASTM A691 |
| Schedule | Schedule 20, 30, 40, STD, 80, XS, 60, 80, 120, 140, 160, XXS |
| Dimensions | ASME, ASTM, and API |
| Form | Square, Round, Hydraulic, Rectangular, Etc |
| Tubes Size | 1 / 2” Other Daimeter up to 5” Other Daimeter |
| End | Beveled End, Plain End, Treaded |
| Outer Diameter | 6-2500 milimeter; Wall Thickness :1-200 milimeter |
| Type | EFW / Seamless / Fabricated |
| Length | Double Random, Single Random, & Cut Length. |
Standard Specification for Seamless Ferritic and Austenitic
Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
1.1 This specification covers seamless ferritic and austenitic
steel boiler, superheater, and heat-exchanger tubes, designated
Grades T91, TP304, etc. These steels are listed in Tables 1 and 2.
1.2 Grades containing the letter, H, in their designation, have
requirements different from those of similar grades not containing
the letter, H. These different requirements provide higher
creep-rupture strength than normally achievable in similar grades
without these different requirements.
1.3 The 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.
1.4 The values stated in either SI units or inch-pound units are to
be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system may not be
exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems
may result in non-conformance with the standard. The inch-pound
units shall apply unless the “M” designation of this specification
is specified in the order.
TABLE 1 Chemical Composition Limits, %A, for Low Alloy SteelA
Maximum, unless range or minimum is indicated. Where ellipses (…)
appear in this table, there is no requirement, and analysis for the
element need not be determined or reported.
B It is permissible to order T2 and T12 with a sulfur content of
0.045 max. See 16.3.
C Alternatively, in lieu of this ratio minimum, the material shall
have a minimum hardness of 275 HV in the hardened condition,
defined as after austenitizing and cooling to room temperature but
prior to tempering. Hardness testing shall be performed at
mid-thickness of the product. Hardness test frequency shall be two
samples of product per heat treatment lot and the hardness testing
results shall be reported on the material test report.
| Composition, % | |||||||||||||
| Grade | UNS Designation | Carbon | Manganese | Phosporus | Sulphur | Silicon | Nickel | Chromium | Molybdenum | Vanadium | Niobium | Aluminium | Other Elements |
| T5 | K41545 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 | … | 4.00-6.00 | 0.45-0.65 | … | |||
| T9 | K90941 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.03 | … | 1.00-1.50 | 0.90-1.10 | … | |||
| T11 | K11597 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | … | 1.00-1.50 | 0.44-0.65 | … | |||
| T22 | K21590 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 | … | 1.90-2.60 | 0.87-1.13 | … | |||
| T91 | K90901 | 0.07-0.14 | 0.30-0.60 | 0.02 | 0.010 | 0.20-0.50 | 0.4 | 8.0-9.5 | 0.85-1.05 | 0.18-0.25 | 0.06-0.10 | 0.02 | Ti 0.01 ZR 0.01 |
| Hot rolled | Outside Diameter, mm | Tolerance, % |
| OD≤101.6, WT≤2.4 | +40/-0 | |
| OD≤101.6, 2.4＜WT≤3.8 | +35/-0 | |
| OD≤101.6, 3.8＜WT≤4.6 | +33/-0 | |
| OD≤101.6, WT>4.6 | +28/-0 | |
| OD>101.6, 2.4＜WT≤3.8 | +35/-0 | |
| OD>101.6, 3.8＜WT≤4.6 | +33/-0 | |
| OD>101.6, WT>4.6 | +28/-0 | |
| Cold Drawn | Outside Diameter, mm | Tolerance, % |
| OD≤38.1 | +20/-0 | |
| OD>38.1 | +22/-0 |
| Hot rolled | Outside Diameter, mm | Tolerance, mm |
| OD≤101.6 | +0.4/-0.8 | |
| 101.6＜OD≤190.5 | +0.4/-1.2 | |
| 190.5＜OD≤228.6 | +0.4/-1.6 | |
| Cold Drawn | Outside Diameter, mm | Tolerance, mm |
| OD＜25.4 | ±0.10 | |
| 25.4≤OD≤38.1 | ±0.15 | |
| 38.1＜OD＜50.8 | ±0.20 | |
| 50.8≤OD＜63.5 | ±0.25 | |
| 63.5≤OD＜76.2 | ±0.30 | |
| 76.2≤OD≤101.6 | ±0.38 | |
| 101.6＜OD≤190.5 | +0.38/-0.64 | |
| 190.5＜OD≤228.6 | +0.38/-1.14 |
