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ASTM A213 Seamless Tubing Specifications (Alloy and Stainless Steel)

Keywords: ASTM A213 seamless tubing, ASTM A213 grades, ASTM A213 alloy steel and stainless steel tube

ASTM A213/A213M - Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes

ASTM A213 / ASME SA213 is the standard specification for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes. It covers a wide range of grades designed for high-temperature and high-pressure service in power generation, petrochemical, and industrial processing applications. This guide provides a complete overview of the standard, including available grades, key properties, size ranges, and selection criteria to help you choose the right tubing for your project.

ASTM A213 alloy seamless boiler tube

ASTM A213 Seamless Tubing Grade: Quick Selection Guide

Selecting the right ASTM A213 grade depends primarily on the operating temperature and pressure of your application. The table below provides a quick reference for the most common grades.

Grade	Material Type	Temperature	Key Characteristics	Common Applications
T11	Ferritic Alloy Steel	Up to 580°C	Good creep strength and oxidation resistance	Boiler tubes, superheaters, heat exchangers
T12	Ferritic Alloy Steel	Up to 580°C	Similar to T11, slightly different alloy content	Boiler tubes, superheaters, headers
T22	Ferritic Alloy Steel	Up to 580°C	Higher Cr & Mo for improved high-temp strength	High-temp superheaters, reheaters, steam pipelines
T91	Martensitic Steel	Up to 625°C	Excellent creep strength (2-3x T22)	High-temp superheaters, reheaters, pressure parts
TP304H	Austenitic Stainless Steel	Up to 650°C	Good oxidation and corrosion resistance	High-temp superheaters, reheaters
TP347H	Austenitic Stainless Steel	Up to 650°C	Nb-stabilized, improved creep strength	Ultra-supercritical boiler final-stage superheaters

Selection Tip: For standard boiler applications up to 580°C, T11, T12, or T22 are cost-effective choices. For supercritical and ultra-supercritical plants requiring temperatures above 600°C, T91, T92, or TP347H are recommended.

Scope and Application:

ASTM A213 standard applies to seamless ferritic and austenitic alloy steel pipes used in high-temperature and high-pressure environments, specifically for:

● Boilers: Heating elements and water wall tubes
● Superheaters: Increasing steam temperature in power plants
● Heat Exchangers: Heat energy transfer in chemical and petrochemical industries

Material Types Covered:
Seamless Ferritic Alloy Steel Pipe: It has high heat resistance and good mechanical properties and is suitable for high temperature environments.
Austenitic Alloy Stainless Steel Pipe: It has good corrosion resistance and high strength and is suitable for various industrial applications.

Size range:
NPS 1/4'' to NPS 24''
Wall Thickness - Schedules 40 through 160, STD, XS, XXS.
Unscheduled heavy wall pipe thicknesses available up to 4 inches.

Hunan Standard Steel Co., Ltd (HSCO) supplies a comprehensive range of ASTM A213 seamless tubes, covering grades from T2, T5, T5b, T5c, T9, T11, T12, T21, T22, T23, T91 (Type 1 & Type 2), to T92. ▶ For detailed dimensional data, please refer to our [ASTM A213 Seamless Tube Dimensions Chart].

Chemical Composition:

ASTM A213 specifies strict chemical composition limits for each grade to ensure heat resistance, mechanical properties, and corrosion resistance.

T-Series (Ferritic Alloy Steels) – Chemical Composition

ASTM A213M-09 Material Comparison Tables (ASTM →KS, JIS, DIN, BS, NBN, NF, UNI)

Grade	UNS Designation	C	Mn	P	S	Si
T2	K11547	0.10–0.20	0.30–0.61	0.025	0.025B	0.10–0.30
T5	K41545	0.15	0.30–0.60	0.025	0.025	0.5
T5b	K51545	0.15	0.30–0.60	0.025	0.025	1.00–2.00
T5c	K41245	0.12	0.30–0.60	0.025	0.025	0.5
T9	K90941	0.15	0.30–0.60	0.025	0.025	0.25–1.00
T11	K11597	0.05–0.15	0.30–0.60	0.025	0.025	0.50–1.00
T12	K11562	0.05–0.15	0.30–0.61	0.025	0.025B	0.5
T17	K12047	0.15–0.25	0.30–0.61	0.025	0.025	0.15–0.35
T21	K31545	0.05–0.15	0.30–0.60	0.025	0.025	0.50–1.00
T22	K21590	0.05–0.15	0.30–0.60	0.025	0.025	0.5
T23	K40712	0.04–0.10	0.10–0.60	0.03	0.01	0.5
T24	K30736	0.05–0.10	0.30–0.70	0.02	0.01	0.15–0.45
T36	K21001	0.10–0.17	0.80–1.20	0.03	0.025	0.25–0.50
T91	K90901	0.07–0.14	0.30–0.60	0.02	0.01	0.20–0.50
T92	K92460	0.07–0.13	0.30–0.60	0.02	0.01	0.5
T122	K91271	0.07–0.14	0.7	0.02	0.01	0.5
T911	K91061	0.09–0.13	0.30–0.60	0.02	0.01	0.10–0.50

Grade	UNS Designation	Vana-	Boron	Niobium	Nitrogen	Aluminum	Tungsten
Grade	UNS Designation	dium	Boron	Niobium	Nitrogen	Aluminum	Tungsten
T2	K11547	...	...	...	...	...	...
T5	K41545	...	...	...	...	...	...
T5b	K51545	...	...	...	...	...	...
T5c	K41245	...	...	...	...	...	...
T9	K90941	...	...	...	...	...	...
T11	K11597	...	...	...	...	...	...
T12	K11562	...	...	...	...	...	...
T17	K12047	0.15	...	...	...	...	...
T21	K31545	...	...	...	...	...	...
T22	K21590	...	...	...	...	...	...
T23	K40712	0.20–0.30	0.0010–0.006	0.02–0.08	0.015	0.03	1.45–1.75
T24	K30736	0.20–0.30	0.0015–0.007	...	0.012	0.02	...
T36	K21001	0.02	...	0.015–0.045	0.02	0.05	...
T91	K90901	0.18–0.25	...	0.06–0.10	0.030–0.07	0.02	...
T92	K92460	0.15–0.25	0.001–0.006	0.04–0.09	0.030–0.07	0.02	1.5–2.00
T122	K91271	0.15–0.30	0.0005–0.005	0.04–0.10	0.040–	0.02	1.50–2.50
T911	K91061	0.18–0.25	0.0003–0.006	0.06–0.10	0.040–0.09	0.02	0.90–1.10

Mechanical Properties: Alloy Steel and Stainless Steel Tubing

Grade	Tensile strength	Yield point(Mpa)	Elongation(%)	Impact(J)	Hardness
Grade	(Mpa)	not less than	not less than	not less than	not less than
A213 T2/SA213 T2	≥415	205		"	85HRB
A213 T11/SA213 T11	≥415	205		"	85HRB
A213 T22/SA213 T22	≥415	205		"	85HRB
A213 T23/SA213 T23	≥510	400	20	"	97HRB
A213 T24/SA213 T24	≥585	415	20	"	25HRB
A213 T91/SA213 T91	≥585	415	20	"	25HRB
A213 T911/SA213 T911	≥620	440	20	"	25HRB
A213 T22/SA213 T92	≥620	440	20	"	25HRB
A213 T122/SA213 T122	≥620	400	20		25HRB
TP304H	≥515	205	35		90HRB
TP316H	≥515	205	35		90HRB
TP321H	≥515	205	35		90HRB
TP347H	≥515	205	35		90HRB
S30432	≥590	235	35		95HRB
TP310HCbN	≥655	295	30		100HRB

Note:
A 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 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.

ASTM A213 Stainless Steel Tubing Specification

ASTM A213 standard is a common used specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Super heater, and Heat-Exchanger Tubes, offering manufacture and purchasing requirements for manufactures and users, main information contain grade, size, finishes, test and other terms, the equivalent standard is ASME SA213.

ASTM A213 Ferritic And Austenitic Alloy–Steel Material Grades

ASTM A213 Specification covers material containing alloy steels, Ferritic and Austenitic steels, Austenitic stainless steel is the most used group due to their properties, common designated grades are listed, in table 1 for chemical composition, table 2 for mechanical properties and solution temperature.

TP-Series (Austenitic Stainless Steels) – Chemical Composition %

Grade	C	Si	Mn	Cr	Ni	Mo	S	P
TP304	0,08	1,0	2	18 – 20	8 – 11	–	0,03	0,045
TP304L	0,035	1,0	2	18 – 20	8 – 12	–	0,03	0,045
TP316	0,08	1,0	2	16 – 18	11 – 14	2 – 3	0,03	0,045
TP316L	0,035	1,0	2	16 – 18	10 – 14	2 – 3	0,03	0,045
TP321	0,08	1,0	2	17 – 19	9 – 12	–	0,03	0,045

Mechanical properties and solution temperature (Min, degree centigrade).

Grade	Tensile Strength(Mpa)	Yield Point(Mpa)	Elongation(%)	Hardness(HRB)	Solution Temperature
TP304	515	205	35	90	1040
TP304L	485	170	35	90	1040
TP316	515	205	35	90	1040
TP316L	485	170	35	90	1040
TP321	515	205	35	90	1040

Manufacturing and Testing:

Manufacturing Process:
ASTM A213 seamless tubes are produced through a process including:

● Hot rolling or cold drawing of steel billets
● Annealing and pickling to achieve the required microstructure and surface finish
● Finishing to precise dimensions

Key Testing Requirements:

ASTM A213 requires rigorous testing to ensure quality and performance:

● Hydrostatic Test: Each tube is hydrostatically tested (or may be replaced by NDT per buyer agreement).
● Tensile Test: Samples per heat treatment lot.
● Flattening and Flaring Tests: Evaluate ductility and workability.
● Hardness Test: Brinell or Rockwell testing as per standard.

● Grain Size: Determined per ASME E112 for specific grades.

Frequently Asked Questions (FAQ)

Q1: What is the difference between ASTM A213 and ASTM A335?
A: ASTM A213 covers boiler, superheater, and heat-exchanger tubes (smaller diameters, typically used for heat transfer surfaces). ASTM A335 covers seamless ferritic alloy-steel pipe for high-temperature service (larger diameters, used for piping systems like main steam lines).

Q2: What is the maximum operating temperature for ASTM A213 T91?
A: T91 can operate up to approximately 625°C for pressure parts, making it suitable for supercritical boiler applications. For ultra-supercritical applications, T92 (up to 650°C) or TP347H (up to 650°C+) may be required.

Q3: How do I choose between T22 and T91?
A: Choose T22 for standard high-temperature applications up to 580°C. Choose T91 for higher temperatures (up to 625°C) where superior creep strength is required, such as in supercritical power plants.

Q4: What is the difference between TP304H and TP347H?
A: TP304H is a standard austenitic stainless steel for high-temperature service. TP347H contains niobium (Nb) as a stabilizing element, providing better high-temperature creep strength and resistance to intergranular corrosion, making it preferred for ultra-supercritical boiler final-stage superheaters.

Q5: Does ASME SA213 fully align with ASTM A213?
A: Yes, ASME SA213 is the ASME Boiler and Pressure Vessel Code adopted version of ASTM A213. The technical requirements are essentially identical. ASME SA213 is typically specified for boiler and pressure vessel applications.

△ Need ASTM A213 Seamless Tubes for Your Project?

Hunan Standard Steel Co., Ltd (HSCO) supplies a full range of ASTM A213/ASME SA213 seamless tubes in all standard grades and sizes. Our tubes are manufactured to strict quality standards and are suitable for power generation, petrochemical, and industrial applications.

Email: sales@hu-steel.com

HSCO Steel – Your Trusted Partner for Seamless Boiler Tube Solutions

● Schedule 80 Carbon Steel Pipe

● Carbon steel ERW boiler tube & air heater tube specification

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