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X 7 CrNi18 9

Korea KS X7CrNi189 Seamless steel tubes for pressure purpose-Technical delivery Conditions - Part 4:Austenitic stainless steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: X7CrNi189 / X 7 CrNi18 9
Category Grade Standard Region/Area Standard Content
Metals X 7 CrNi18 9 KS D ISO 9329-4 Korea Seamless steel tubes for pressure purpose-Technical delivery Conditions - Part 4:Austenitic stainless steels

Chemical composition(mass fraction)(wt.%) of the X 7 CrNi18 9

Element Min Max Similar
C 0.0400 0.1000 -
Mn - 2.0000 -
P - 0.0450 -
S - 0.0300 -
Si - 1.0000 -
Ni 8.0000 11.0000 -
Cr 17.0000 19.0000 -
C 0.0400 0.1000 -
Mn - 2.0000 -
P - 0.0400 -
S - 0.0300 -
Si - 1.0000 -
Ni 8.0000 11.0000 -
Cr 17.0000 19.0000 -

Mechanical Properties of steel grade X 7 CrNi18 9

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
899 (≥) 842 (≥) 43 41 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical Properties of steel grade X 7 CrNi18 9

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
23 - -     0.41 -  
359 786 - 22.3 422   -  
274 - 12 34.2   333 314

Heat Treatment of steel grade X 7 CrNi18 9

Heat treated : 1646°C - 1853°C

Technological Curves of steel grade X 7 CrNi18 9

Cross Reference Table (Equivalent Grade) of X 7 CrNi18 9

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