DL/T 999-2006 Standard for Grading Spheroidized 2.25Cr-1Mo Steel Balls for Power Stations

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Features: This standard applies to the grading of spheroidization for high-temperature components such as overheated steam pipes, headers, and steam conduits made of 2.25Cr－1Mo steel, with metal wall temperatures below 570 degrees Celsius, after long-term use under high-temperature conditions. The grading of spheroidization for heat-exposed surfaces of pipes made of similar materials with metal wall temperatures below 580 degrees Celsius may be referred to for implementation. Effective from October 1, 2006.