AlloySA213 T22 Alloy Steel Boiler Tube
FamilyCarbon & Alloy Steel
Supplied toASME SA213 T22, ASTM A213 T22
Typical serviceSuperheaters, Reheaters, High-temperature headers
Size range1/2" to 4" OD, .065" to .400" wall
TempersAnnealed, or normalized and tempered per SA213
Testing100% NDE per SA213, hydrostatic, hardness, flattening, flaring; PMI on request
OriginDomestic and approved import mills, inspected and certified in Hillsboro
Sourced alloy, certified in HillsboroAmeritube does not manufacture SA213 T22 in Texas. It is supplied from qualified domestic and international mills, then received, inspected, tested, and released under our ISO 9001:2015 system in Hillsboro, Texas, with a full mill test report.
What SA213 T22 is
T22 is a 2-1/4Cr-1Mo ferritic alloy steel, the highest-strength conventional low-alloy boiler tube before moving to the 9-chrome and stainless grades. It resists oxidation and graphitization to about 1100 degrees F and handles high-temperature hydrogen further along the Nelson curve than T11 or T12.
Chemical composition
| Element | Requirement |
|---|---|
| Carbon | 0.05 to 0.15% |
| Manganese | 0.30 to 0.60% |
| Silicon | 0.50% max |
| Chromium | 1.90 to 2.60% |
| Molybdenum | 0.87 to 1.13% |
| Phosphorus / Sulfur | 0.025% max each |
Mechanical properties
| Property | Minimum |
|---|---|
| Tensile strength | 60,000 psi (415 MPa) |
| Yield strength | 30,000 psi (205 MPa) |
| Elongation in 2" | 30% |
| Hardness | 85 HRB max |
Where it is used
- Final superheater and reheater tube in utility boilers.
- High-temperature headers and steam leads.
- HRSG high-pressure superheater modules.
- Hydrocracker and hydrotreater heater tubes within Nelson curve limits.
- Ammonia and methanol plant exchangers in hydrogen service.
Beyond T22
When T22 runs out of creep margin, the next steps are T91 modified 9-chrome or the austenitic stainless grades TP304H, TP321H, and TP347H. We supply those too.
What to put in your SA213 T22 RFQ
OD, minimum wall, length, quantity, heat treatment condition, hardness cap, PMI requirement, and the ASME Section or licensor specification governing the job.