Embrittlement of 21/4 CrMoV steel bolts after long exposure at 540 °C

An investigation of the embrittlement in

An investigation of the embrittlement in X20CrMoV12.1 power plant steel after long-term service exposure at elevated temperature

✍ Zheng-Fei Hu; Zhen-Guo Yang 📂 Article 📅 2004 🏛 Elsevier Science 🌐 English ⚖ 368 KB

X20CrMoV12.1 alloy steel used as main steam pipes in power plants exhibits embrittlement at room temperature after long-term service exposure at 550 • C and the embrittlement can be partly removed by retempering. Microstructural observation shows that the carbides in the exposed pipe coarsened heavi