Nickel base alloy Inconel 718 seamless pipe W.Nr.2.4668
Nickel base alloy Inconel 718 seamless pipe W.Nr.2.4668
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Material
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Nickel alloy
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Standard
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ASTM B983
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Grade
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INCONEL 718
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Brade
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PYE
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Size
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O.D 6-219mm; W.T:1-30mm
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Chemical composition
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Ni: 50~55% ; Cr:17~21% ; Fe: balance;Mo:2.8~3.3% ; Nb: 4.75~5.5% ; Co: ≤1.0% ; C≤0.08% ; Mn≤0.35% ; Si≤ 0.35% ; Cu≤0.3% ; Al: 0.2~0.8% ; Ti: 0.65~1.15% ; P≤0.015% ;
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Density
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8.24 g/cm3
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Melting range
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1260~1340℃
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Characteristic as below
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1.workability
2.High tensile strength,endurance strength,creep strength and rupture strength at 700℃. 3.High inoxidability at1000℃. 4.Steady mechanical performance in the low temperature. 5.Good welding performance. |
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Metallurgical structure
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718 alloy is Austenitic structure, precipitation hardening generate "γ" made it excellent mechanical performance. G rain boundary generate "δ" made it the best plasticity in the heat treatment.
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Corrosion resistance
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718 alloy with extremely resistance to stress corrosion cracking and pitting ability in high temperature or low temperature environments, especially the inoxidability in the high temperature.
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Application field
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The elevated temperature strength, excellent corrosion resistance and workability at 700℃ properties made it use in a wide range of high requirement environments.
1.Steam turbine 2.Liquid-fuel rocket 3.Cryogenic engineering 4.Acid environment 5.Nuclear engineering |
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