T22 Grade Seamless Alloy Steel Pipe Boiler / Super Heater Tube For
High Temperature
ASTM A213 T22 is the part of ASTM A213 Standard Specification for
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater,
Heat-Exchanger Tubes.
1. Ordering Information
Quantity (feet, meters, or number of lengths),
Name of material (seamless tubes),
Grade (T22),
Condition (hot finished or cold finished),
Size (outside diameter and minimum wall thickness),
Length (specific or random),
Hydrostatic Test or Nondestructive Electric Test
Increased Sulfur, and
Special requirements and any supplementary requirements selected.
2. Standards:
ASTM A213 Standard Specification for Seamless Ferritic and
Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger
Tubes
3. Application:
Power plant; Boilers; Heat-Exchangers; Chemical Fertilizer;
Petrochemicals; Offshore Oils; Gas Productions; Refineries and etc.
4. Chemical Requirements
| Chemical Requirements |
| Grade | UNS Designation | Composition, % |
| C | Mn | p | S | Si | Cr | Mo | Other Elements |
| max | max |
| T22 | K21590 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.9-2.6 | 0.87-1.13 | |
5. Mechanical Properties
Tensile Strength min: 60ksi/415MPa
Yield Strength min: 30ksi/205MPa
6. Available Size Range
| OD | Thickness |
| mm | inch | mm | SCH |
| 88.9~141.3 | 3''~ 5'' | 2.11~19.05 | SCH10~XXS |
| *If the steel grades and size you are looking for are not listed
above, please contact us for further information. |
7. Heat Treatment Requirements
| Heat Treatment Requirements |
| Grade | UNS Number | Heat Treat Type | Austenitizing/Solutioning Temperature min or range | Cooling Media | Subcritical Annealing or Tempering Temperature
min or range °F 【°C】 |
| T22 | K21590 | full or isothermal anneal normalize and temper | … | … | 1250°F【675°C】 |
