Stainless Steel ASME SA213 TP310S Seamless Tubes for Fired Heater
Stainless Steel ASME SA213s TP310S Seamless Tubes for Fired Heater
ASME SA213/ASTM A213 This specification covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes.
SS ASME SA213 TP310S is a premium austenitic alloy specifically selected for the most severe high-temperature sections of fired heaters. Its primary role is to resist oxidation (scaling) and carburization while maintaining strength at temperatures where standard stainless steels like 304H or 321H would fail.
| Chemical Composition (%) max | ||||||||
| Grade | UNS | C | Mn | P | S | Si | Cr | Ni |
| TP310S | S34700 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 24.0-26.0 | 19.0-22.0 |
| Mechanical Properties | |||
| Tensile Strength, min | Yield Strength, min. | Elongation in 2 in. or 50mm, min. | Brinell/Vickers;Rockwell |
| 75ksi [ 515MPa ] | 30ksi [205MPa ] | 35% | 192HBW/200HV ;90HRB |
Below are advantages of material TP310S:
| 1.Exceptional Oxidation Resistance: this is its standout feature, the high Chromium content (24-26%) forms a stable, self-healing chromium oxide (Cr₂O₃) layer on the surface. This layer protects the base metal from scaling at temperatures up to 1150°C (2100°F) in continuous service. |
| 2.Excellent Resistance to Carburization: in heaters processing hydrocarbons, carbon from the process stream can diffuse into the tube metal at high temperatures. TP310's high nickel and chromium content creates a stable microstructure that is highly resistant to this carbon absorption, which can cause embrittlement and failure. |
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3.High-Temperature Strength: TP310 retains its mechanical strength and resists creep (slow deformation under stress and temperature) better than 304/304H or 316/316H. This prevents tube sagging, bulging, and premature rupture under design pressure and temperature.
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| 4.Good Sulfidation Resistance: while not as resistant as some specialized alloys, it performs better than lower-chromium steels in environments with sulfur compounds from fuel or process streams. |
Common Applications in Fired Heater
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Radiant Section Tubes: The hottest section with direct flame radiation. |
| Bridgewall Piping: The area separating the radiant and convection sections. |
| Inlet & Outlet Header Piping: For sections exposed to the highest fluid temperatures. |
| Shock Coils: The first few rows of the convection section where flue gas temperatures are still very high. |
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