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LJ
On the basis of F91 steel, F92 steel appropriately reduces the content of molybdenum (0.5%Mo), and at the same time adds a certain amount of tungsten (1.8%W), and the molybdenum equivalent of the material (Mo+0.5W) is changed from 1% of F91 steel Referring to about 1.5%, the steel also has trace amounts of boron added. Compared with other chromium-molybdenum heat-resistant steels after the above-mentioned alloying improvement, the high-temperature corrosion and oxidation resistance of F92 steel is similar to that of 9%Cr steel, but the high-temperature strength and creep properties of the material have been further improved. At the same time, F92 steel It also has better low-cycle thermal fatigue resistance than austenitic stainless steel (such as 347H).
Chemical Composition(%)
| C | Mn | P | S | Si | Ni | Cr |
| 0.07-0.13 | 0.30-0.60 | ≤0.020 | ≤0.010 | ≤0.50 | ≤0.40 | 8.50-9.50 |
| Mo | Nb | V | N | Al | W | B |
| 0.30-0.60 | 0.04-0.09 | 0.15-0.25 | 0.030-0.070 | ≤0.04 | 1.50-2.00 | 0.001-0.006 |
Mechanical Property
Tensile Strength σb (MPa) | Yield Strength σ0.2 (MPa) | Elongation δ5 (％) | Reduction ψ (％) | Impact J/cm |
| ≥ 620 | ≥ 440 | ≥20 | ≥45 | 234 |
On the basis of F91 steel, F92 steel appropriately reduces the content of molybdenum (0.5%Mo), and at the same time adds a certain amount of tungsten (1.8%W), and the molybdenum equivalent of the material (Mo+0.5W) is changed from 1% of F91 steel Referring to about 1.5%, the steel also has trace amounts of boron added. Compared with other chromium-molybdenum heat-resistant steels after the above-mentioned alloying improvement, the high-temperature corrosion and oxidation resistance of F92 steel is similar to that of 9%Cr steel, but the high-temperature strength and creep properties of the material have been further improved. At the same time, F92 steel It also has better low-cycle thermal fatigue resistance than austenitic stainless steel (such as 347H).
Chemical Composition(%)
| C | Mn | P | S | Si | Ni | Cr |
| 0.07-0.13 | 0.30-0.60 | ≤0.020 | ≤0.010 | ≤0.50 | ≤0.40 | 8.50-9.50 |
| Mo | Nb | V | N | Al | W | B |
| 0.30-0.60 | 0.04-0.09 | 0.15-0.25 | 0.030-0.070 | ≤0.04 | 1.50-2.00 | 0.001-0.006 |
Mechanical Property
Tensile Strength σb (MPa) | Yield Strength σ0.2 (MPa) | Elongation δ5 (％) | Reduction ψ (％) | Impact J/cm |
| ≥ 620 | ≥ 440 | ≥20 | ≥45 | 234 |
