ASTM A213 / ASME SA213 T11 T22 Alloy Steel Seamless Tubes Manufacturer

Short Description:

ASME SA-213 / ASTM A213 Grade T11 seamless tubes, with a nominal chemical composition of 1.25% Chromium – 0.5% Molybdenum – Silicon, are widely used in the manufacture of boilers, superheaters, and heat exchangers operating under high-temperature and high-pressure conditions.

These alloy steel tubes are typically supplied in sizes ranging from 1/8 inch (3.2 mm) inside diameter up to 5 inches (127 mm) outside diameter, with wall thicknesses from 0.015 inch to 0.500 inch (0.4 mm to 12.7 mm). Tubing may be furnished with either minimum wall thickness or, when specified in the purchase order, average wall thickness, in accordance with ASTM A213 / ASME SA213 requirements.

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ASTM A213 T11 Alloy Steel Seamless Pipe / Tube

Product Description

ASTM A213 T11 alloy steel pipe is a chromium-molybdenum (Cr-Mo) alloy seamless tube manufactured in accordance with ASTM A213 / ASME SA213 standards, specifically designed for high-temperature and high-pressure applications.
Thanks to its excellent creep resistance, oxidation resistance, and thermal stability, T11 alloy steel tubes are widely used in boilers, superheaters, heat exchangers, and power generation systems.

Compared with carbon steel tubes, ASTM A213 T11 alloy steel seamless pipes offer superior mechanical strength and longer service life under elevated temperature conditions, making them a reliable choice for critical industrial applications.

Womic supplies high-quality ASTM A213 T11 pipes with strict quality control, ensuring consistent performance and compliance with international standards.

Common Grades in ASTM A213 Standard

The ASTM A213 standard covers a wide range of alloy steel and stainless steel tube grades commonly used in high-temperature and high-pressure applications.

Typical and widely used grades include:

Alloy Steel Grades: T9, T11, T12, T21, T22, T91

Stainless Steel Grades: TP304, TP304L, TP316, TP316L

These grades are specifically designed to meet different service requirements related to temperature resistance, pressure strength, corrosion resistance, and mechanical performance.

ASTM A213 Standard – Scope of Application

According to ASTM specifications, ASTM A213 / ASME SA213 applies to seamless ferritic and austenitic steel tubes intended for use in:

Boilers

Superheaters

Heat exchangers

Reheaters

High-temperature pressure systems

The specification includes both alloy steel grades (such as T5, T9, T11, T22, T91) and austenitic stainless steel grades (such as TP304, TP316), as detailed in Table 1 and Table 2 of the standard.

Tube Size Range

ASTM A213 tubing is manufactured in a broad range of dimensions to suit various industrial applications:

OD: 1/8” to 16”. 3.2mm to 406mm

WT: 0.015” to 0.500”, 0.4mm to 12.7mm

For projects requiring non-standard sizes, tubes may be supplied upon request. Customers can specify custom dimensions, including minimum wall thickness and average wall thickness, as part of the purchase order.

Chemical Composition of ASTM A213 T11 (%)

Element	Content (%)
Carbon (C)	0.05 – 0.15
Chromium (Cr)	1.00 – 1.50
Molybdenum (Mo)	0.44 – 0.65
Manganese (Mn)	0.30 – 0.60
Silicon (Si)	0.50 – 1.00
Phosphorus (P)	≤ 0.025
Sulfur (S)	≤ 0.025

The chromium and molybdenum alloying elements significantly enhance high-temperature strength, corrosion resistance, and creep resistance.

Mechanical Properties

Property	Requirement
Tensile Strength	≥ 415 MPa
Yield Strength	≥ 205 MPa
Elongation	≥ 30%
Hardness	≤ 179 HB

These properties ensure excellent durability and safety during long-term high-temperature operation.

Chemical Composition Limits, %A, for Low Alloy Steel

Grade	UNS Designation	Composition,%
Grade	UNS Designation	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Chromium	Molybdenum	Vanadium	Other Elements
T2	K11547	0.10-0.20	0.30-0.61	0.025	0.025b	0.10-0.30	0.50-0.81	0.44-0.65	…	…
T5	K41545	0.15	0.30-0.60	0.025	0.025	0.50	4.00-6.00	0.45-0.65	…	…
T5b	K51545	0.15	0.30-0.60	0.025	0.025	1.00-2.00	4.00-6.00	0.45-0.65	…	…
T5c	K41245	0.12	0.30-0.60	0.025	0.025	0.50	4.00-6.00	0.45-0.65	…	Ti 4xC-0.70
T9	K90941	0.15	0.30-0.60	0.025	0.025	0.25-1.00	8.00-10.00	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	…	…
T12	K11562	0.05-0.15	0.30-0.61	0.025	0.025b	0.50	0.80-1.25	0.44-0.65	…	…
T17	K12047	0.15-0.25	0.30-0.61	0.025	0.025	0.15-0.35	0.80-1.25	…	0.15	…
T21	K31545	0.05-0.15	0.30-0.60	0.025	0.025	0.50-1.00	2.65-3.35	0.80-1.06	…	…
T22	K21590	0.05-0.15	0.30-0.60	0.025	0.025	0.50	1.90-2.60	0.87-1.13	…	…

AMaximum,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.

BIt is permissible to order T2 and T12 with a suflur content of 0.045 max.

Tensile and Hardness Requirements

Grade	UNS Designation	Tensile Strength,min,ksi [MPa]	Yield Strength,min,ksi [MPa]	Elongation in 2 in. or 50 mm,min,%B,C	HardnessA
Grade	UNS Designation	Tensile Strength,min,ksi [MPa]	Yield Strength,min,ksi [MPa]	Elongation in 2 in. or 50 mm,min,%B,C	Brinell/Vickers	Rockwell
T5b	K51545	60 [415]	30 [205]	30	179 HBW/ 190 HV	89 HRB
T9	K90941	60 [415]	30 [205]	30	179 HBW/ 190 HV	89 HRB
T12	K11562	60 [415]	32 [220]	30	163 HBW/ 170 HV	85 HRB
T23	K140712	74 [510]	58 [400]	20	220 HBW/ 230 HV	97 HRB
All other low alloy grades		60 [415]	30 [205]	30	163 HBW/ 170 HV	85 HRB

AMax,unless a range or a minimum is specified.

Grade	UNS Number	Heat Treat Type	Cooling Media	Subcritical Annealing or Tempering Temperature,min or range °F[°C]
T2	K11547	full or isothermal anneal;or normalize and temper;or subcritical anneal	…	… … 1200 to 1350 [650 to 730]
T5	K41545	full or isothermal anneal;or normalize and temper	…	… 1250 [675]
T5b	K51545	full or isothermal anneal;or normalize and temper	…	… 1250 [675]
T5c	K41245	subcritical anneal	air or fumace	1350 [730]A
T9	K90941	full or isothermal anneal;or normalize and temper	…	… 1250 [675]
T11	K11597	full or isothermal anneal;or normalize and temper	…	… 1200 [650]
T12	K11562	full or isothermal anneal;or normalize and temper;or subcritical anneal	…	… … 1200 to 1350 [650 to 730]
T17	K12047	full or isothermal anneal;or normalize and temper	…	… 1200 [650]
T21	K31545	full or isothermal anneal;or normalize and temper	…	… 1250 [675]
T22	K21590	full or isothermal anneal;or normalize and temper	…	… 1250 [675]

AApproximately,to achieve properties.

Related Standards for Producing ASTM A213 Pipes

The manufacturing, inspection, and welding of ASTM A213 seamless alloy steel and stainless steel tubes are governed by several associated ASTM standards to ensure product quality, consistency, and performance. Key related standards include the following:

Material Testing & Metallurgical Standards

ASTM A262

Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

Used to evaluate resistance to intergranular corrosion, particularly for austenitic stainless steel grades under ASTM A213.

ASTM E112

Test Methods for Determining Average Grain Size

Specifies procedures for measuring grain size, which directly affects mechanical properties and high-temperature performance.

ASTM A941 / A941M

Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys

Provides standardized terminology used throughout ASTM steel product specifications.

General Manufacturing Requirements

ASTM A1016 / A1016M

Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes

Defines common requirements applicable to ASTM A213 tubes, including heat treatment, mechanical testing, dimensional tolerances, and surface condition.

Welding Consumable Standards (Applicable for Fabrication & Repair)

ASTM A5.5 / A5.5M

Specification for Low-Alloy Steel Electrodes for Shielded Metal Arc Welding (SMAW)

ASTM A5.23 / A5.23M

Specification for Low-Alloy Steel Electrodes and Fluxes for Submerged Arc Welding (SAW)

ASTM A5.28 / A5.28M

Specification for Low-Alloy Steel Electrodes for Gas Shielded Arc Welding (GMAW / GTAW)

ASTM A5.29 / A5.29M

Specification for Low-Alloy Steel Electrodes for Flux-Cored Arc Welding (FCAW)

These standards ensure proper selection of welding consumables compatible with ASTM A213 alloy steel grades such as T11, T22, and T91, maintaining mechanical integrity and corrosion resistance after welding.

Production Specifications

Womic supplies ASTM A213 T11 alloy steel tubes in a wide range of sizes and customized specifications:

Manufacturing Process: Hot Rolled / Cold Drawn

OD: 1/8” to 16”. 3.2mm to 406mm

WT: 0.015” to 0.500”, 0.4mm to 12.7mm

Length:

Random length

Fixed length (6 m, 12 m)

Custom cut length

End Type: Plain end, Beveled end

Surface Treatment: Pickled, Oiled, Black finish, Varnished

Inspection & Test:

Chemical analysis

Mechanical test

Hydrostatic test

Eddy current or ultrasonic test

Equivalent Grades

EN: 13CrMo4-5

DIN: 1.7335

BS: 1503-622

GB: 12Cr1MoVG (similar)

Applications

ASTM A213 T11 alloy steel seamless pipes are extensively used in:

Boilers & Superheaters

Heat Exchangers & Reheaters

Power Plants (Thermal & Fossil Fuel)

Petrochemical & Refinery Equipment

High-Temperature Pressure Vessels

Industrial Furnace Tubing

They are especially suitable for continuous service in high-temperature steam and pressure environments.

Advantages of Womic ASTM A213 T11 Pipes

✔ Strict compliance with ASTM / ASME standards
✔ High-quality raw materials from approved mills
✔ Stable chemical composition & mechanical performance
✔ Full inspection with EN 10204 3.1 Mill Test Certificate
✔ Export-ready packaging and fast global delivery
✔ Custom sizes and technical support available

ASTM A213 T11 Alloy Steel Pipe

ASTM A213 T11 Seamless Tube

T11 Alloy Steel Boiler Tube

Chromium Molybdenum Steel Pipe

ASME SA213 T11 Tube

High Temperature Alloy Steel Pipe

Heat Exchanger Tube ASTM A213 T11

Contact Womic Today !

If you are looking for a reliable supplier of ASTM A213 T11 alloy steel pipes, please contact Womic for competitive pricing, technical support, and fast delivery.
We are ready to support your boiler, power plant, and high-temperature piping projects worldwide.

Email: sales@womicsteel.com

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