Special Steel Pipe

UNS N07718

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1.Standard:ASTM B637
2.Chemical Composition (%)

Elements C Mn P S Si C Mo Ni Ti Nh+T Fe B AI
Min 17.0 2.8 50.0 0.65 4.75 0.2
Max 0.08 0.35 0.015 0.015 0.35 21.0 3.3 55.0 1.15 5.50 remainder 0.006 0.8
Actual value 0.037 0.21 0.005 0.008 0.13 18.29 2.92 53.74 0.79 4.82 17.47 0.0025 0.69

3.Mechanical properties

Mechanical Propertie Tengile Strenctr
WFa		 Yield 5trength
NF		 Elongatiom% Grain Size
Min 793 758 12 4
Max 965
Actual value 1275 932 32 5

4.Typical Size

Size mm Outside Diamete
mm		 Tolerance of Outside
Lhamete
mm		 Wall thickness
mm		 Tolerance of Wall Thickness
Mm
115×11 115 ±0.69 11 ±8.0%

Note : Standard  requirements  control   range : OD : ± 0.515mm.WT : ± 12.5%

5.Typical Application Environment

UNSN07718 can be widely used in all kinds of high requirements of working condition due to its high temperature strength. excellent carrasion resistance at 700 ℃ .

Uses:Steam turbine.Liquid fuel  rackets.Cryogenic engineering  Adidic environment Nudear engineering

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