ASTM A213 T22, also known as ASME SA213 T22, is a low-alloy seamless steel pipe with 1.90–2.60% chromium and 0.87–1.13% molybdenum as the main alloying elements, commonly used in boilers, superheaters, and heat exchangers in high-temperature, high-pressure environments.
UNS designation is K21590.
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T22 steel pipes shall be made by the seamless process and shall be either hot finished or cold finished, as specified.
All T22 steel pipes shall be reheated for heat treatment, which must be carried out separately and in addition to the heating for hot forming.
The permitted heat treatment methods are full or isothermal annealing, or normalize and temper.
| Grade | Heat Treat Type | Subcritical Annealing or Temperature |
| ASTM A213 T22 | full or isothermal anneal | — |
| normalize and temper | 1250 ℉ [675 ℃] min |
An analysis of either one billet or one tube shall be made from each heat. The chemical composition thus determined shall conform to the requirements specified.
| Grade | Composition, % | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| T22 | 0.05 ~ 0.15 | 0.30 ~ 0.60 | 0.025 max | 0.025 max | 0.50 max | 1.90 ~ 2.60 | 0.87 ~ 1.13 |
| Mechanical Properties | ASTM A213 T22 | |
| Tensile Requirements | Tensile Strength | 60 ksi [415 MPa] min |
| Yield Strength | 30 ksi [205 MPa] min | |
| Elongation in 2 in. or 50 mm |
30 % min | |
| Hardness Requirements | Brinell/Vickers | 163 HBW / 170 HV max |
| Rockwell | 85 HRB max | |
| 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. | |
Moreover, the mechanical properties of ASTM A213 T22 are the same as those of T2, T5, T5c, T11, T17, and T21.
ASTM A213 T22 tubing sizes and wall thicknesses are usually furnished with inside diameters ranging from 3.2 mm to outside diameters of 127 mm, and minimum wall thicknesses from 0.4 mm to 12.7 mm.
Of course, if your project requires other sizes, that is also allowed, as long as all other applicable requirements in ASTM A213 are met.
The dimensional tolerance requirements of ASTM A213 are the same and have been listed for T11 alloy steel pipes. You can click to view them if needed.
ASTM A213 T22 seamless steel pipes are widely used in high-temperature and high-pressure service conditions, especially in the power generation, petrochemical, and oil & gas industries.
Typical applications include:
Boiler tubes are used for superheaters, reheaters, and economizers in power plants.
Heat exchangers are used in chemical and petrochemical plants.
Furnace tubes are used in high-temperature furnace applications.
Steam pipes are used to carry high-pressure steam in industrial plants.
| ASME | ASTM | EN | GB | JIS |
| ASME SA213 T22 | ASTM A335 P22 | EN 10216-2 10CrMo9-10 | GB/T 5310 12Cr2MoG | JIS G 3462 STBA24 |
Material: ASTM A213 T22 seamless steel pipes and fittings;
Size: 1/8" to 24", or customized according to your requirements;
Length: Random length or cut to order;
Packaging: Black coating, beveled ends, pipe end protectors, wooden crates, etc.
Support: IBR certification, TPI inspection, MTC, cutting, processing, and customization;
MOQ: 1 m;
Payment Terms: T/T or L/C;
Price: Contact us for the latest T22 steel pipe prices.
