ASTM A213 T23 Alloy Steel Tube For Superheater and Reheater Sections in Boilers
ASTM A213 T23 Alloy Steel Tube For Superheater and Reheater Sections in Boilers
Specification
ASTM A213 T23 alloy steel tube is designed for high-temperature and high-pressure applications, such as those in power plants and refineries. It is a Creep Strength Enhanced Ferritic (CSEF) steel that features a chromium-molybdenum alloy with additional micro-alloying elements like tungsten, vanadium, niobium, and boron to enhance its performance at extreme temperatures. Its key benefits include superior creep strength, high resistance to oxidation, and excellent mechanical properties like a minimum tensile strength of 510 MPa and minimum yield strength of 400 MPa.
| American Standard | Standard Name |
| A213 / A213M | Seamless Ferritic and Austenitic Alloy-steel Boiler,Superheater and Heat-Exchanger Tubes |
ASTM A213 T23 Alloy Steel Pipe Chemical Composition
Sources American Standard A213 / A213M TABLE 1 Chemical Composition Limits, % , for Low Alloy Steel
| Grade | UNS Designation |
C | Mn | P | S | Si | Ni | Cr | Mo | V | B | Nb | N | Al | W | Others |
| T23 | K40712 | 0.04-0.10 | 0.10-0.60 | 0.03 | 0.01 | 0.5 | 0.4 | 1.90-2.60 | 0.05-0.30 | 0.2-0.3 | 0.001-0.006 | 0.02-0.08 | 0.015 | 0.03 | 1.45-1.75 | Ti 0.005-0.060 Ti/N ≥3.5C |
| C Alternatively, in lieu of this ratio minimum, the material shall have a minimum hardness of 275 HV in the hardened condition, defined as after austenitizing and cooling to room temperature but prior to tempering. Hardness testing shall be performed at mid-thickness of the product. Hardness test frequency shall be two samples of product per heat treatment lot and the hardness testing results shall be reported on the material test report. | ||||||||||||||||
ASTM A213 T23 Alloy Steel Pipe Mechanical Properties
Sources American Standard A213 / A213M TABLE 4 Tensile and Hardness Requirements
| Grade Low Aloy Steels: |
UNS Designation |
TensileStrength. min, ksi [MPa] |
Yield Strength ,min, ksi [MPa] |
Elongationin 2 in. or 50 mm. min, %B.C |
HardnessA | |
| Brinell/Vickers | Rockwell | |||||
| T23 | K40712 | 74 [510] | 58 [400] | 20 | 220 HBW/230 HV | 97 HRB |
ASTM A213 T23 Alloy Steel Pipe Heat Treatment
Sources American Standard A213 / A213M TABLE 3 Heat Treatment and Grain Size Requirements A
| Grade Ferritic Alloy Steels |
UNS Designation |
Heat Treatment Type | Austenitizing/Solution Treatment StabilizingTemperature,min or range °F [°C] |
Cooling Media | Subcritical Annealingor TemperingTemperature,min or range °F [°C] |
| T23 | K40712 | normalize and temper | 1900-1975[1040-1080] | - | 1350-1470[730-800] |
ASTM A213 T23 Alloy Steel Pipe Manufacturing Proces
ASTM A213 T23 Alloy Steel Pipe Application
- Superheater and Reheater Sections in Boilers
- Water Wall Panels
- High-Efficiency / Ultra-Supercritical Boilers
- Replacement for T22 and T12
- Heat Recovery Steam Generators (HRSGs)
ASTM A213 T23 Alloy Steel Pipe Packing & Loading
a. 1/2"-2"Plain end with black oil paint, caps both ends, bundles with loading belt.
b. 2"-4"Beveled end with black oil paint, caps both ends, bundles with loading belt.
c. 10"-20"Beveled end with black oil paint, caps both ends, loose packed in to container.
→Alloy Steel Pipes is transported in containers
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