16Mo3 steel is a grade specified in the European standard EN 10216-2:2002 "Technical Delivery Conditions for Carbon Steel and Alloy Steel Seamless steel tubes for High Temperatures". It is mainly used for high temperature steam piping systems of power station boilers and steam turbines. 16Mo3 steel elbow is an important part of the pipeline system, and it is a relatively weak link in the pipeline system. The quality and performance of the elbow are directly related to the safety and reliability of the pipeline system operation.
The results of the 500 ℃ high temperature short-time tensile test of 16Mo3 steel, it can be seen that the high temperature yield strength of the different parts of the trial bend pipe meets the requirements of EN 10216-2:2002, that is, Rpo.2>146 MPa; The short-term high temperature tensile strength and elongation after fracture are uniform in value, which is equivalent to the performance of the original 16Mo3 steel.
Room temperature impact properties of 16Mo3 steel
The room temperature (20℃) Charpy impact test of 16Mo3 steel shows that the impact toughness of different parts of the trial bend pipe is significantly higher than the requirements of EN 10216-2: 2002, that is, the transverse Akv>27J, the longitudinal Akv=40J. The longitudinal and transverse impact toughness values of each part of the bending part of the 16Mo3 steel elbow are generally uniform, and the deviation from the original 16Mo3 steel impact toughness is small.
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