Incoloy 800H pipe is a slightly modified version of Incoloy 800 with the 800H grade possessing higher creep and rupture strength. The modification of incoloy alloy 800H pipe is possible because of
the closely controlled carbon content and modified heat treatment.
INCOLOY ALLOY 800H PIPE EQUIVALENT SPECIFICATION
Country Body Grade
USA UNS N08800
France AFTER Z8NC 32.21
GB BS NA 15
Germany DIN 1.4876
INCOLOY ALLOY 800H PIPE PHYSICAL PROPERTIES
Properties Metric Units
Density 7,940 kg /m3 @ 20℃
Melting Range 1357-1385. ℃
Electrical Resistivity 0.989 micro-ohm. m @ 20℃
Specific Heat 460y / kg. ℃@ 20℃
Mean Coefficient of Expansion 14. 4x10 / ℃ @ 20℃
Thermal Conductivity 11. 5W / m. @ 20℃
Curie Temperature -115℃
Modulus of Elasticity
Tension 196.5 Gpa @ 20℃
Torsion 73.4 Gpa @ 20℃
Poisson's Ratio 0 . 339 @ 20℃
INCOLOY ALLOY 800H PIPE CHEMICAL COMPOSITION
Element Incoloy 800 Incoloy 800H Incoloy 800HT
Nicke 30.00-35.00 30.00-35.00 30.00-35.00
Chromium 19.00-23.00 19.00-23.00 19.00-23.00
Iron 39.50 min 39.50 min 39.50 min
Carbon 0.10 max 0.10 max 0.10 max
Aluminum 0.15-0.60 0.15-0.60 0.25-0.60
Titanium 0.15-0.60 0.15-0.60 0.25-0.60
Aluminum + Titanium 0.30-1.20 0.30-1.20 0.30-1.20
ASTM Grain Size Not Specified 5 or Coarser
INCOLOY ALLOY 800H PIPE MECHANICAL PROPERTIES
Incoloy 800H/N08810 Nickel Alloy Pipe/Tube Yield Strength Tensile Strength Elongation
Mpa Mpa %
Incoloy 800, 800H, 800HT Hot Finished Annealed 170 450 30
Incoloy 800 Cold Worked. Annealed 205 520 30
INCOLOY ALLOY 800H PIPE HIGHLIGHTS
Incoloy 800H(UNS N08810) pipe has a restricted carbon content range of 0.05 to 0.10%, which is in the upper portion of that of Incoloy 800 tube and is annealed at 1149 to 1177℃ (Incoloy 800 is
annealed at 983 to 1038℃). These differences impart Incoloy 800H pipe to have higher stress rupture and creep properties than Incoloy 800.
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