9Ni steel being characterized of high strength and good toughness is one of the main materials in making large LNG cryogenic storage tank.Both the chemical composition and mechanical properties of 9Ni steel listed in ASME and GB24510-2009 are introduced,p%9Ni钢具有强度高、韧性好的特点,是制造大型液化天然气低温储罐的主要材料之,介绍ASME和GB24510-2009中9Ni钢的化学成分、力学性能;分析9Ni钢在焊接时产生的问题及原因.提出预防和解决的措施;简述9Ni钢目前国内生产现状。
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