Grade X8Ni9
Old Grade
Corresponding Standard ISO 9327(-3)-1999
Steel forgings and rolled or forged bars for pressure purposes-Technical delivery conditions-Part 3:Nickel steels with specified low temperature properties
Classification Alloy Steel
X8Ni9 Chemical Element Composition Content (%)
Component C Si Mn P S Ni Mo V
Minimum Value - - 0.3 - - 8 - -
Maximum Value 0.1 0.35 0.8 0.025 0.02 10 0.1 0.05
X8Ni9 Mechanical Properties
thickness
t
mm
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
t≤30 640~840 ≥490 ≥18
30<t≤50 640~840 ≥480 ≥18
X8Ni9 Corresponding Standards(Same grade name, different standards)

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