Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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ASME SA336 F11 Cl2 Stationary Tubesheet For Nuclear Power Heat Exchanger Tube Sheet
ASME SA336 F11 CL2 high-temperature alloy steel tubesheets are core pressure-bearing components of shell-and-tube heat exchangers designed for extreme high-temperature, high-pressure, and hydrogen-corrosive environments.
Made from chromium-molybdenum alloy steel forgings (1.0-1.5% Cr, 0.44-0.65% Mo), heat-treated to ensure high strength and toughness even at temperatures ≤595°C.
This material resists high-temperature hydrogen corrosion and is suitable for demanding applications such as hydrogenation reactors, nuclear steam generators, and thermal power plant high-pressure feedwater heaters. Compared to carbon steel tubesheets, its high-temperature strength retention is 40% higher, and controlled hardness effectively suppresses wet H₂S stress corrosion cracking.
Typical applications include refinery 15MPa-rated reaction effluent heat exchangers, thermal power plant feedwater systems subject to temperature swings exceeding 150°C, and waste heat boilers in ammonia synthesis plants.
SA336 Grade F11 Class 2 Chemical Element Content (%)
| Composition | C | Si | Mn | P | S | Cr | Mo |
| Minimum | 0.1 | 0.5 | 0.3 | - | - | 1 | 0.45 |
| Maximum | 0.2 | 1 | 0.8 | 0.025 | 0.025 | 1.5 | 0.65 |
SA336 Grade F11 Class 2 Mechanical Properties
| Tensile Strength
| Yield Point
| Elongation or Elongation
| Reduction of Area
|
| 485~660 | ≥275 | ≥20 | ≥40 |
Application
