ASTM A213 T24 Alloy Steel Tube For Water Wall Panels in Boilers
ASTM A213 T24 Alloy Steel Tube For Water Wall Panels in Boilers
Specification
ASTM A213 T24 alloy steel tube is designed for high-temperature applications like boilers, superheaters, and heat exchangers. It is a chrome-moly tube, meaning it contains chromium and molybdenum, with a specific composition of about 2.20-2.60% chromium and 0.90-1.10% molybdenum. Key characteristics include good high-temperature strength, oxidation resistance, and durability.
| American Standard | Standard Name |
| A213 / A213M | Seamless Ferritic and Austenitic Alloy-steel Boiler,Superheater and Heat-Exchanger Tubes |
ASTM A213 T24 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 | Cr | Mo | V | B | N | Al | Others |
| T24 | K30736 | 0.05-0.10 | 0.30-0.70 | 0.02 | 0.01 | 0.15-0.45 | 2.20-2.60 | 0.90-1.10 | 0.2-0.3 | 0.0015-0.007 | 0.012 | 0.02 | Ti 0.06-0.10 |
ASTM A213 T24 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 | |||||
| T24 | K30736 | 85 [585] | 60 [415] | 20 | 250 HBW/265 HV | 25 HRC |
ASTM A213 T24 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] |
| T24 | K30736 | normalize and temper | 1800-1870[980-1020] | D | 1350-1420[730-770] |
| D Accelerated cooling from the normalizing temperature shall be permitted for section thicknesses greater than 3 in. [75 mm]. | |||||
ASTM A213 T24 Alloy Steel Pipe Manufacturing Proces
ASTM A213 T24 Alloy Steel Pipe Application
- Superheater and Reheater Sections in Boilers
- Water Wall Panels in Boilers
- Ultra-Supercritical (USC) Boilers
- Replacement for T22 and T12
- Applications Requiring High Strength and Weldability
ASTM A213 T24 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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