Description
Product Description
ASTM A213 T91 seamless tube are high-strength, ferritic alloy steel tubes designed for high-temperature service in boiler, superheater, and heat-exchanger applications. These tubes are renowned for their exceptional resistance to oxidation and corrosion, combined with high creep strength and durability at elevated temperatures. The T91 grade’s unique chemical composition ensures enhanced performance and longevity in demanding environments.
Chemical Composition ASTM A213 T91 Seamless Tube
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 - 0.12 |
| Manganese (Mn) | 0.30 - 0.60 |
| Phosphorus (P) | 0.020 max |
| Sulfur (S) | 0.010 max |
| Silicon (Si) | 0.20 - 0.50 |
| Chromium (Cr) | 8.00 - 9.50 |
| Molybdenum (Mo) | 0.85 - 1.05 |
| Vanadium (V) | 0.18 - 0.25 |
| Nitrogen (N) | 0.030 - 0.070 |
| Niobium (Nb) | 0.06 - 0.10 |
| Aluminum (Al) | 0.02 max |
Mechanical Properties ASTM A213 T91 Seamless Tube
| Property | Value |
|---|---|
| Tensile Strength, min (MPa) | 585 |
| Yield Strength, min (MPa) | 415 |
| Elongation, min (%) | 20 |
| Hardness, max (HBW) | 250 |
Conclusion:
ASTM A213 T91 seamless tubes are engineered to meet the stringent requirements of high-temperature applications. The alloy’s precise chemical composition ensures high creep strength, oxidation resistance, and long-term durability. These tubes are particularly suitable for power plants, petrochemical facilities, and other industrial settings where reliable performance under extreme conditions is crucial. With their superior mechanical properties and resistance to thermal stress, ASTM A213 T91 seamless tubes provide an optimal solution for enhancing the efficiency and longevity of critical systems, offering significant operational and maintenance cost benefits.
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