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Eternal
F92 power plant valves forged by Jiangyin Eternal Heavy Industry Co., Ltd.—critical high-temperature, high-pressure equipment specifically designed for ultra-supercritical coal-fired power units. Forged as a single piece from F92 martensitic heat-resistant steel (ASTM A182), these valves feature optimized tungsten (W) and molybdenum (Mo) content based on 9Cr steel, providing excellent high-temperature creep rupture strength and resistance to low-cycle thermal fatigue.
The F92 power plant valves can withstand temperatures up to 650°C and a CLASS 4500 pressure rating, meeting the demands of severe operating conditions such as 605°C/27.56 MPa. The optimized forging process effectively controls grain size and surface cracking, while heat treatments such as secondary tempering ensure microstructural stability. Choose forged F92 valves to provide reliable ultra-supercritical pressure containment for your power plant system.
Element | C | Si | Mn | P | S | Cr | Mo | Ni | V | Nb | W | N |
(%) | 0.07~0.13 | ≤0.50 | 0.30~0.60 | ≤0.020 | ≤0.010 | 8.50~9.50 | 0.30~0.60 | ≤0.40 | 0.15~0.25 | 0.04~0.09 | 1.50~2.00 | 0.03~0.07 |
Item | Data |  |
Heat treatment | Normalizing + Tempering（N+T） | |
Normalizing temperature | 1040℃~1090℃ | |
Tempering temperature | 730℃~780℃ | |
Tensile strength Rm | 630~850 MPa | |
Minimum yield strength ReL | ≥440 MPa | |
Minimum elongation A | ≥20% | |
Minimum cross-sectional contraction rate Z | ≥45% | |
Minimum impact energy KV₂ (20℃) | ≥40 J | |
Hardness HBW | 178~260 | |
Maximum service temperature | 650℃ |
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The use of an electric arc furnace (EAF) combined with VODC vacuum refining and electroslag remelting (ESR) ensures low gas content (H ≤ 1.5 × 10⁻⁴, O ≤ 30 × 10⁻⁴) and high purity.
The forging ratio of the main cross-section should be ≥3 (for electroslag remelted ingots) or ≥4 (for non-electroslag remelted ingots) to ensure a dense and uniform microstructure.
By strictly adhering to the normalising and tempering process, a tempered martensitic microstructure with fine MX precipitation phases is achieved, with hardness precisely controlled between 178 and 260 HBW.
Ultrasonic testing shall be carried out on a piece-by-piece basis, with quality grades not lower than Grade 2 for individual defects, a reduction of 2 grades in the base wave, and Grade I for defects in dense areas. Acceptable grain size grades for F92: Grades 3 to 5.
Application | Typical Conditions |
Supercritical thermal power plant（593℃） | Main steam pipeline valves, reheater valves |
Ultra-supercritical thermal power plant（620℃+） | High-temperature and high-pressure steam trap, three-way valve body |
Power station boiler | F92 forged steel gate valve, globe valve body |
Nuclear power plant conventional island | High-temperature steam pipeline valves |
Petrochemical industry | High-temperature reactor connection flange |
In what operating conditions are F92 valves primarily used?
They are specifically designed for high-temperature, high-pressure steam pipelines in ultra-supercritical thermal power plants, with typical parameters of temperature ≤ 610°C and pressure ≥ 25 MPa (CLASS 4500). They are suitable for critical locations such as main steam drain and reheating pipelines, and serve as core pressure-bearing components that replace imported products.
What is the difference between F92 and F91 materials?
Why do F92 valves often fail to meet impact toughness standards after welding?
What are the advantages of forged F92 valves compared to cast ones?
