ASTM A213 T93 Alloy Steel Tube For Power Boilers
ASTM A213 T93 Alloy Steel Tube For Power Boilers
Specification
ASTM A213 T93 alloy steel tube is a seamless, ferritic alloy-steel tube designed for high-temperature service in boilers, superheaters, and heat exchangers. It is known for its high-temperature and corrosion resistance, excellent high-pressure performance, and enhanced creep strength, making it suitable for demanding applications in power generation and the petrochemical industry.
| American Standard | Standard Name |
| A213 / A213M | Seamless Ferritic and Austenitic Alloy-steel Boiler,Superheater and Heat-Exchanger Tubes |
ASTM A213 T93 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 | V | B | Nb | N | Al | W | Others |
| T93 | K91350 | 0.05-0.10 | 0.20-0.70 | 0.02 | 0.008 | 0.05-0.5 | 0.2 | 8.5-9.50 | 0.15-0.30 | 0.007-0.015 | F | 0.005-0.015 | 0.03 | 2.5-3.5 | Co 2.5-3.5 Nd 0.010-0.060 O 0.005 |
| F Grade T93 shall have a Nb + Ta content of 0.05-0.12 %. | |||||||||||||||
ASTM A213 T93 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 | |||||
| T93 | K91350 | 90 [620] | 64 [440] | 19 | 250 HBW/ 265 HV | 25 HRC |
ASTM A213 T93 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] |
Subcritical Annealingor TemperingTemperature,min or range °F [°C] |
| T93 | K91350 | normalize and temper | 1960-2140[1070-1170] | 1380-1455[750-790] |
ASTM A213 T93 Alloy Steel Pipe Manufacturing Proces
ASTM A213 T93 Alloy Steel Pipe Application
- Advanced Ultra-Supercritical (A-USC) Power Boilers
- High-Efficiency Fossil Fuel Power Systems
- Main Steam Lines and Headers
- Replacement for Austenitic Stainless Steels
- Severe Service Petrochemical Applications
ASTM A213 T93 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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