F9材料还具有一定的抗氢腐蚀性能，能够在含氢介质中保持较好的稳定性，这对于一些需要在含氢环境中运行的阀门来说，尤为重要。
F9 material also has certain resistance to hydrogen corrosion and can maintain good stability in hydrogen containing media, which is particularly important for valves that need to operate in hydrogen containing environments.
综上所述，大型阀门锻件采用F9材料，主要是基于其优异的高温性能、耐腐蚀性能、焊接性能和抗氢腐蚀性能，这些特点使得F9材料成为制造高温高压阀门锻造件的理想选择。
In summary, the use of F9 material for large valve forgings is mainly based on its excellent high-temperature performance, corrosion resistance, welding performance, and hydrogen corrosion resistance. These characteristics make F9 material an ideal choice for manufacturing high-temperature and high-pressure valve forgings.