ASTM A213 T9 Seamless Alloy Pipe
ASTM A213 T9 seamless chrome-moly alloy steel pipe for boiler, superheater, and heat-exchanger service at elevated temperatures. Designed for high creep strength, oxidation resistance, and reliable performance in industrial heat-transfer and high-temperature applications.
Standard & Grade
- Standard: ASTM A213 / ASME SA213
- Grade: T9
- Product type: Seamless ferritic alloy steel pipe
Applications
- Boilers
- Superheaters
- Heat exchangers
- High-temperature industrial piping systems
Manufacturing
- Manufactured by the seamless process
- Supplied hot finished or cold finished, as specified
Heat Treatment
- Heat treatment performed separately in addition to hot forming
- Ferritic alloy steels reheated in accordance with ASTM A213
- Delivery condition: annealed
Testing & Inspection
- Tension test
- Hardness test
- Flattening test
- Flaring test
- Each pipe subjected to non-destructive electric testing or hydrostatic testing
Chemical Composition (%)
- UNS Designation: K90941
- Carbon: 0.15
- Manganese: 0.30 – 0.60
- Phosphorus: 0.025
- Sulfur: 0.025
- Silicon: 0.25 – 1.00
- Chromium: 8.00 – 10.00
- Molybdenum: 0.90 – 1.10
Mechanical Properties
- Tensile strength (min): 415 MPa
- Yield strength (min): 220 MPa
- Elongation: 30%
Dimensional Scope (ASTM A213)
- Inside diameter: from 1/8 in. (3.2 mm)
- Outside diameter: up to 5 in. (127 mm)
- Wall thickness: 0.015 – 0.500 in. (0.4 – 12.7 mm)
- Other sizes available on request