换热管材料 Inconel 625？ inconel 625 element content ni 58% min cr 20 - 23% mo 8 - 10% nb+ta 3.15 - 4.15% fe 5% max 321ss在高温高氢分压的湿蒸气环境还是不够安全，3系列的奥实体不锈钢都不可靠。 inconel 625的换热管不是很常见但是经常使用于海水，高温高氢分压的湿蒸气环境等。建议用hairpin 类型来提高换热减少尺寸。 characteristics excellent mechanical properties at both extremely low and extremely high temperatures. outstanding resistance to pitting, crevice corrosion and intercrystalline corrosion. almost complete freedom from chloride induced stress corrosion cracking. high resistance to oxidation at elevated temperatures up to 1050c. good resistance to acids, such as nitric, phosphoric, sulfuric and hydrochloric, as well as to alkalis makes possible the construction of thin structural parts of high heat transfer. applications components where exposure to sea water and high mechanical stresses are required. oil and gas production where hydrogen sulfide and elementary sulfur exist at temperature in excess of 150c. components exposed to flue gas or in flue gas desulfurization plants. flare stacks on offshore oil platforms. hydrocarbon processing from tar-sand and oil-shale recovery projects. 查看更多
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