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4 Ch 18 N 9 S 2 WG

Bulgaria BDS 4Ch18N9S2WG High alloyed steels for internal combustion engine valves. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4Ch18N9S2WG / 4 Ch 18 N 9 S 2 WG
Category Grade Standard Region/Area Standard Content
Metals 4 Ch 18 N 9 S 2 WG BDS 9634 Bulgaria High alloyed steels for internal combustion engine valves. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 4 Ch 18 N 9 S 2 WG

Element Min Max Similar

Mechanical Properties of steel grade 4 Ch 18 N 9 S 2 WG

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)
986 (≥) 117 (≥) 44 23 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade 4 Ch 18 N 9 S 2 WG

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 - -     0.44 -  
621 693 - 23.3 243   -  
587 - 32 32.2   411 121

Heat Treatment of steel grade 4 Ch 18 N 9 S 2 WG

Heat treated : 1314°C - 1685°C

Technological Curves of steel grade 4 Ch 18 N 9 S 2 WG

Cross Reference Table (Equivalent Grade) of 4 Ch 18 N 9 S 2 WG

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