AlloySA213 T11 Alloy Steel Boiler Tube
FamilyCarbon & Alloy Steel
Supplied toASME SA213 T11, ASTM A213 T11
Typical serviceBoilers, Superheaters, Heat exchangers
Size range1/2" to 4" OD, .065" to .300" wall
TempersAnnealed, normalized, or normalized and tempered per SA213
Testing100% NDE per SA213, hydrostatic, hardness, flattening, flaring
OriginDomestic and approved import mills, inspected and certified in Hillsboro
Sourced alloy, certified in HillsboroAmeritube does not manufacture SA213 T11 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 T11 is
T11 is a 1-1/4Cr-1/2Mo-Si ferritic alloy steel. The silicon addition gives it slightly better oxidation resistance than T12; otherwise the two are close cousins. T11 delivers reliable creep strength to about 1050 degrees F metal temperature and welds with standard low-alloy procedures.
Chemical composition
| Element | Requirement |
|---|---|
| Carbon | 0.05 to 0.15% |
| Manganese | 0.30 to 0.60% |
| Silicon | 0.50 to 1.00% |
| Chromium | 1.00 to 1.50% |
| Molybdenum | 0.44 to 0.65% |
| 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
- Superheater and reheater tube in industrial and utility boilers.
- HRSG high-pressure evaporator and superheater modules.
- Refinery convection section tubes.
- High-temperature heat exchangers in chemical plants.
T11, T12, or T22
T11 and T12 overlap almost completely; the choice usually follows the OEM drawing. Above about 1050 degrees F or where hydrogen attack is a factor, T22 with its 2-1/4% chromium is the next step. We supply all three.
What to put in your SA213 T11 RFQ
OD, minimum wall, length, quantity, heat treatment condition, whether bends are required, and any ASME Section I supplementary requirements or utility specification.