Astm A213 T9 Alloy Pipes
ASTM A213 T9 seamless alloy steel pipes designed for boiler, superheater, and heat exchanger applications, offering improved creep resistance and high-temperature mechanical performance.
Overview
ASTM A213 T9 alloy pipes are seamless ferritic alloy steel tubes intended for boiler, superheater, and heat exchanger service. These pipes are engineered for high-temperature and high-pressure environments, providing enhanced creep-rupture strength compared to conventional low alloy steels.
Manufacturing & Heat Treatment
- Seamless manufacturing process
- Hot finished or cold finished as specified
- Separate heat treatment applied in addition to hot forming
- Ferritic alloy steels reheated after hot forming
- Austenitic grades supplied in heat-treated condition
- Optional rapid cooling or water quenching after solution treatment
Testing & Inspection
- Tension test
- Hardness test
- Flattening test
- Flaring test
- Nondestructive electric test or hydrostatic test
Typical Size Range
| Outside Diameter | 1/8 in. (3.2 mm) to 5 in. (127 mm) |
| Wall Thickness | 0.015 – 0.500 in. (0.4 – 12.7 mm) |
Chemical Composition – ASTM A213 T9 (%)
| C | Mn | P | S | Si | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.15 | 0.30 – 0.60 | 0.025 | 0.025 | 0.25 – 1.00 | 8.00 – 10.00 | 0.90 – 1.10 |
Mechanical Properties
| Tensile Strength | 415 MPa |
| Minimum Yield Strength | 220 MPa |
| Elongation | 30% |
| Delivery Condition | Annealed |
Related ASTM Specifications
- ASTM A209 – Carbon-molybdenum alloy steel boiler and superheater tubes
- ASTM A210 – Medium-carbon steel boiler and superheater tubes
- ASTM A213 – Ferritic and austenitic alloy steel tubes
Typical Applications
ASTM A213 T9 alloy pipes are widely used in boilers, superheaters, heat exchangers, power plants, petrochemical units, and other high-temperature pressure systems where strength, creep resistance, and long-term reliability are essential.