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FORGED STEEL MATERIAL FOR NUCLEAR POWER GENERATION DEVICES, AND WELDED STRUCTURE FOR NUCLEAR POWER GENERATION DEVICES
FORGED STEEL MATERIAL FOR NUCLEAR POWER GENERATION DEVICES, AND WELDED STRUCTURE FOR NUCLEAR POWER GENERATION DEVICES
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机译:核动力装置用锻钢材料,核动力装置用焊接结构
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摘要
The single steel for a nuclear power generator of the present invention satisfies a predetermined chemical composition and the grain size of the metal structure is 4.5 to 7.0 in terms of particle size according to ASTM. When the mass ratio of Al and N (Al / N) is 1.93 or more, when the N content is 0.0100 mass% or more and less than 1.93, the Al content is preferably 0.022 mass% or more. Such a single steel material for nuclear power generation equipment is excellent in strength, toughness and hydrogen cracking resistance even after stress relieving annealing after welding.
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