ASTM A213 T22 Alloy Steel Seamless Tubes are seamless ferritic alloy steel tubes designed for use in boilers, superheaters, and heat exchangers in high-temperature and high-pressure applications.Tube material could be in alloy steel and stainless steel, and manufactured in seamless of hot rolled or cold drawn. It is commonly used in power plants, refineries, and petrochemical industries.
A213 is often called chrome moly tube because of the chemical makeup of Molybdenum (Mo) and Chromium (Cr). Molybdenum increases the strength of steel as well as the elastic limit, resistance to wear, impact qualities, and hardenability. Chrome is virtually irreplaceable in resisting oxidation at elevated temperatures. Chrome raises the tensile, yield, and hardness at room temperatures.
What is SA 213 T22 material?
SA213 T22 material is a seamless, ferritic and austenitic alloy steel tube, often called a “chrome-moly” tube, designed for high-temperature applications like boiler tubes, superheaters, and heat exchangers, known for its resistance to corrosion and oxidation.
Key Features & Advantages:
✅ High-Temperature Strength – Performs well in elevated temperatures.
✅ Oxidation & Corrosion Resistance – Chromium (Cr) and Molybdenum (Mo) improve oxidation and corrosion resistance.
✅ Good Weldability – Suitable for welding with proper preheating and post-weld heat treatment (PWHT).
✅ Durability & Long Service Life – Withstands extreme pressure and temperature conditions.
Applications of SA 213 T22:
Power Plants – Boiler tubes, steam pipelines.
Petrochemical Industry – Heat exchangers, reformers.
Refineries – High-temperature tubing for cracking units.
Industrial Boilers & Superheaters – For steam generation.
Would you like welding recommendations or equivalent material grades?
What are the grades of ASTM A213?
ASTM A213 / ASME SA213 covers seamless ferritic and austenitic alloy steel tubes used in boilers, superheaters, and heat exchangers for high-temperature and high-pressure applications.
These grades are low-alloy ferritic steels with good high-temperature strength and oxidation resistance.
| Grade | Chemical Composition Highlights | Key Features | Applications |
| T1 | 0.24% C, 0.30–0.80% Mn, 0.44–0.65% Mo | Basic grade, moderate strength | Low-pressure boilers |
| T2 | 0.10–0.20% C, 0.30–0.61% Mn, 0.44–0.65% Mo | Improved strength over T1 | Power plants |
| T5 | 4.00–6.00% Cr, 0.45–0.65% Mo | High oxidation resistance | Steam boilers, heat exchangers |
| T9 | 8.00–10.00% Cr, 0.90–1.10% Mo | High creep resistance | High-pressure boilers |
| T11 | 1.00–1.50% Cr, 0.44–0.65% Mo | Moderate strength, easy weldability | Industrial boilers |
| T12 | 0.80–1.25% Cr, 0.44–0.65% Mo | Slightly better oxidation resistance than T11 | Heat exchangers, refinery piping |
| T22 | 1.90–2.60% Cr, 0.87–1.13% Mo | Higher strength, oxidation resistance | Superheaters, power plants |
| T23 | 1.90–2.60% Cr, 0.05–0.30% Mo, 0.20–0.30% V, 0.03–0.07% Nb | Higher strength than T22 | High-pressure boilers |
| T24 | 2.00–2.50% Cr, 0.90–1.10% Mo, 0.20–0.30% V, 0.03–0.07% Nb | High creep and oxidation resistance | Ultra-supercritical boilers |
| T91 | 8.00–9.50% Cr, 0.85–1.05% Mo, 0.18–0.25% V, 0.06–0.10% Nb | High strength, superior oxidation resistance | Power generation, oil refineries |
| T92 | 8.50–9.50% Cr, 0.30–0.60% Mo, 0.15–0.25% V, 0.03–0.07% Nb, 0.45–0.65% W | Higher creep and thermal efficiency than T91 | Ultra-supercritical boilers |
Alloy Steel Tube Specification
| Processing Method: | Seamless and Welded |
| Size Range | 1/8” – 48” / DN6 – 1200 |
| Thickness Schedule | SCH 20- SCH 160, XXS |
| Length | 6m or 12 m or Random |
| Standard | ASME B36.10 |
| Surface Treatment | Blasting and Painting, Epoxy Powder FBE, 2PE, 3PE Coating |
| Material Grade | A213 T11 / T12 / T22 / T5 / T9 / T91 / T92. ASTM A335 P11 / P12 / P22/ P 5 / P9 / P91 / P92 |
ASTM A213 Standard Scope
This specification covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes, designated Grades T5, TP304, etc. These steels are listed in Tables 1 and 2.
General Requirements
Product furnished to this specification shall conform to the requirements of Specification A 1016/A 1016M, including any supplementary requirements that are indicated in the purchase order. Failure to comply with the general require- ments of Specification A 1016/A 1016M constitutes noncon- formance with this specification. In case of conflict between the requirements of this specification and Specification A 1016/ A 1016M, this specification shall prevail.
Ordering Information
It shall be the responsibility of the purchaser to specify all requirements that are necessary for products under this specification. Such requirements to be considered include, but are not limited to, the following:
1.1 Quantity (feet, metres, or number of lengths),
1.2 Name of material (seamless tubes),
1.3 Grade (Tables 1 and 2),
1.4 Condition (hot finished or cold finished),
1.5 Controlled structural characteristics (see 6.3),
1.6 Size (outside diameter and minimum wall thickness, unless average wall thickness is specified),
1.7 Length (specific or random),
1.8 Hydrostatic Test or Nondestructive Electric Test (see 10.1),
1.9 Specification designation and year of issue,
1.10 Increased sulfur (for machinability, see Note B, Table 1, and 15.3), and
1.11 Special requirements and any supplementary require- ments selected.
A213 T22 Alloy Steel Seamless TubesChemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Cr | Mo |
| ASTM A213 T22 | MIN | 0.050 | 0.30 | 1.90 | 0.870 | |||
| MAX | 0.150 | 0.60 | 0.025 | 0.025 | 0.50 | 2.60 | 1.130 |
Mechanical Properties of A213 T22 Alloy Steel Seamless Tubes
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
| 415 min | 205 min | 30 min |
What is the equivalent of ASTM A213 T22?
ASTM A213 T22 is a seamless ferritic alloy steel tube used in high-temperature applications, such as boiler, superheater, and heat-exchanger tubes. It primarily contains chromium (Cr) and molybdenum (Mo) for enhanced strength and oxidation resistance.
Equivalent Grades of ASTM A213 T22:
| Standard | Equivalent Grade |
| ASME | SA213 T22 |
| UNS (Unified Numbering System) | K21590 |
| DIN (Germany) | 10CrMo9-10 (1.7380) |
| EN (Europe) | 10CrMo9-10 |
| BS (British Standard) | 10CrMo9-10 |
| JIS (Japan) | STBA22 |
| GOST (Russia) | 12Х1МФ |
ASTM A213 T22 Tubes Dimension
| DN | NPS | OD | SCH10 | SCH20 | SCH30 | STD | SCH40 | SCH60 | XS | SCH80 |
| 6 | 1/8 | 10.3 | 1.24 | – | 1.45 | 1.73 | 1.73 | – | 2.41 | 2.41 |
| 8 | 1/4 | 13.7 | 1.65 | – | 1.85 | 2.24 | 2.24 | – | 3.02 | 3.02 |
| 10 | 3/8 | 17.1 | 1.65 | – | 1.85 | 2.31 | 2.31 | – | 3.2 | 3.2 |
| 15 | 1/2 | 21.3 | 2.11 | – | 2.41 | 2.77 | 2.77 | – | 3.73 | 3.73 |
| 20 | 3/4 | 26.7 | 2.11 | – | 2.41 | 2.87 | 2.87 | – | 3.91 | 3.91 |
| 25 | 1 | 33.4 | 2.77 | – | 2.9 | 3.38 | 3.38 | – | 4.55 | 4.55 |
| 32 | 1 1/4 | 42.2 | 2.77 | – | 2.97 | 3.56 | 3.56 | – | 4.85 | 4.85 |
| 40 | 1 1/2 | 48.3 | 2.77 | – | 3.18 | 3.68 | 3.68 | – | 5.08 | 5.08 |
| 50 | 2 | 60.3 | 2.77 | – | 3.18 | 3.91 | 3.91 | – | 5.54 | 5.54 |
| 65 | 2 1/2 | 73 | 3.05 | – | 4.78 | 5.16 | 5.16 | – | 7.01 | 7.01 |
| 80 | 3 | 88.9 | 3.05 | – | 4.78 | 5.49 | 5.49 | – | 7.62 | 7.62 |
| 90 | 31/2 | 101.6 | 3.05 | – | 4.78 | 5.74 | 5.74 | – | 8.08 | 8.08 |
| 100 | 4 | 114.37 | 3.05 | – | 4.78 | 6.02 | 6.02 | – | 8.56 | 8.56 |
ASME A213 T22 Tubes Permissible Variations in Outside Diameter
| 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 |
ASME A213 T22 Seamless Tubes Permissible Variation in Wall Thickness
| 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 |
What is the difference between T11 and T22 steel?
Both T11 and T22 are seamless ferritic alloy steel tubes used in high-temperature applications such as boilers, superheaters, and heat exchangers. The primary differences lie in chemical composition, mechanical properties, and applications.
- Chemical Composition Comparison
| Element | T11 (%) | T22 (%) |
| Chromium (Cr) | 1.00 – 1.50 | 1.90 – 2.60 |
| Molybdenum (Mo) | 0.44 – 0.65 | 0.87 – 1.13 |
✅ Key Difference:
T22 has higher chromium (Cr) and molybdenum (Mo) content, which improves oxidation resistance, corrosion resistance, and high-temperature strength.
2. Performance & Application Differences
| Feature | T11 | T22 |
| Strength | Moderate | Higher |
| Oxidation & Corrosion Resistance | Good | Excellent (due to more Cr & Mo) |
| Temperature Resistance | High | Higher |
| Weldability | Easier to weld | Requires preheat & PWHT (Post Weld Heat Treatment) |
| Application | Moderate temp & pressure | High-pressure, high-temp applications |
✅ Key Differences:
T22 is stronger, harder, and more corrosion-resistant than T11, making it ideal for high-temperature, high-pressure environments.
T11 is easier to weld and preferred for moderate conditions where extreme resistance is not required.
3. Typical Applications of T11 vs. T22
| Industry | T11 Applications | T22 Applications |
| Power Plants | Boiler tubes, low-pressure steam pipelines | High-pressure steam pipelines, reheaters |
| Petrochemical | Moderate temperature heat exchangers | High-temp furnace tubes |
| Refineries | Process piping | Cracking units, catalytic reformers |
| Industrial Boilers | Medium-pressure boilers | High-pressure steam boilers |
4. Which One to Choose?
Choose T11 if you need good weldability and moderate strength for low to medium temperature applications.
Choose T22 if you need higher strength, better oxidation resistance, and performance in extreme temperature and pressure conditions.
Types of Packaging
✅ Bundled Packing
Tubes are tied in hexagonal or square bundles with steel strips.
Used for long-length tubes to facilitate handling and transport.
✅ Wooden Boxes / Crates
Fully enclosed wooden cases with waterproof protection.
Prevents mechanical damage during shipping.
Used for small-diameter tubes or precision tubes.
✅ Plastic End Caps
Protects tube ends from mechanical damage and dirt.
Used for both bundled and wooden crate packaging.
✅ Waterproof Wrapping
Tubes are wrapped with plastic sheets or waterproof paper.
Prevents rust and corrosion during sea freight.
✅ Loose Packing
Tubes are placed directly in containers with protective layers.
Used for short-distance transportation.
You can get an offer for products in below material forms:
-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)
-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )
-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)
-Round bar , Billet (ASTM A276, ASTM A479)
– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)
-Bolting, Nuts（ASTM A193, A194, A320）
ASTM A213 T22 Alloy Steel Seamless Tubes Exported Countries
We Export ASTM A213 T22 Alloy Steel Seamless Tubes to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc