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
σb
Mpa
|
Yield Point
σs
Mpa
|
Elongation or Elongation
δ
%
|
Reduction of Area
ψ
%
|
| 485~660 |
≥275 |
≥20 |
≥40 |
Application
Energy and Power Industry: Nuclear Power Secondary Circuit Steam Generators, Thermal Power High-Pressure Feedwater Heaters
Petroleum Refining and Chemical Industry: Hydrogenation Reaction Effluent Heat Exchangers, Hydrocracking/Desulfurization Units
Methanol Synthesis Tower Feed Heat Exchangers
Ethylene Cracking Quench Boilers
PTA Process Titanium Heat Exchangers
Marine Diesel Engine Charge Air Coolers
Hydrogen Energy Equipment: High-Pressure Hydrogen Heat Exchangers
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