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| Brand Name: | Jinxi Pipe |
| Model Number: | Alloy Steel Pipe |
| MOQ: | 1 |
| Price: | 1500 USD/TON |
| Payment Terms: | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability: | 100000 |
ASTM A213 T21 Alloy Steel Tube For Superheater and Reheater Sections in Boilers
Specification
ASTM A213 T21 is a seamless alloy steel tube designed for high-temperature applications in boilers, superheaters, and heat exchangers. It is a ferritic alloy steel containing chromium and molybdenum, known for its durability, creep strength, and oxidation resistance. The tubes are manufactured to a specified chemical composition, mechanical properties, and must undergo a heat treatment, such as full annealing, isothermal annealing, or normalizing and tempering.
| American Standard | Standard Name |
| A213 / A213M | Seamless Ferritic and Austenitic Alloy-steel Boiler,Superheater and Heat-Exchanger Tubes |
ASTM A213 T21 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 |
| T21 | K31545 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 2.65-3.35 | 0.80-1.06 |
ASTM A213 T21 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 | |||||
| T21 | K31545 | 60 [415] | 30 [205] | 30 | 163 HB/170 HV | 85 HRB |
ASTM A213 T21 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 | Subcritical Annealingor TemperingTemperature,min or range °F [°C] |
| T21 | K31545 | full or isothermal anneal | - |
| normalize and temper | 1250[675] |
ASTM A213 T21 Alloy Steel Pipe Manufacturing Proces
ASTM A213 T21 Alloy Steel Pipe Application
ASTM A213 T21 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