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9 NiMnMoNb 5-4-4

Korea KS 9NiMnMoNb5-4-4 Seamless steel tubes for pressure purpose-Technical delivery Conditions - Part 2:Unalloyed and alloyed steels with specified elevated temperature properties and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 9NiMnMoNb5-4-4 / 9 NiMnMoNb 5-4-4
Category Grade Standard Region/Area Standard Content
Metals 9 NiMnMoNb 5-4-4 KS D ISO 9329-2 Korea Seamless steel tubes for pressure purpose-Technical delivery Conditions - Part 2:Unalloyed and alloyed steels with specified elevated temperature properties

Chemical composition(mass fraction)(wt.%) of the 9 NiMnMoNb 5-4-4

Element Min Max Similar
C - 0.1700 -
Mn 0.8000 1.2000 -
P - 0.0300 -
S - 0.0300 -
Si 0.2500 0.5000 -
Ni 1.0000 1.3000 -
Cr - 0.3000 -
Mo 0.2500 0.4000 -
Cu 0.0500 0.5000 -
Al - 0.0200 -
Nb 0.0150 0.0450 -

Mechanical Properties of steel grade 9 NiMnMoNb 5-4-4

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)
832 (≥) 296 (≥) 24 31 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical Properties of steel grade 9 NiMnMoNb 5-4-4

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
42 - -     0.43 -  
967 556 - 23.3 221   -  
968 - 44 31.2   423 224

Heat Treatment of steel grade 9 NiMnMoNb 5-4-4

Heat treated : 1866°C - 1816°C

Technological Curves of steel grade 9 NiMnMoNb 5-4-4

Cross Reference Table (Equivalent Grade) of 9 NiMnMoNb 5-4-4

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