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5 Ch 20 N 4 AG 9

Bulgaria BDS 5Ch20N4AG9 High alloyed steels for internal combustion engine valves. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 5Ch20N4AG9 / 5 Ch 20 N 4 AG 9
Category Grade Standard Region/Area Standard Content
Metals 5 Ch 20 N 4 AG 9 BDS 9634 Bulgaria High alloyed steels for internal combustion engine valves. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 5 Ch 20 N 4 AG 9

Element Min Max Similar

Mechanical Properties of steel grade 5 Ch 20 N 4 AG 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)
885 (≥) 889 (≥) 34 23 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical Properties of steel grade 5 Ch 20 N 4 AG 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
42 - -     0.21 -  
165 716 - 21.3 132   -  
393 - 42 14.2   114 332

Heat Treatment of steel grade 5 Ch 20 N 4 AG 9

Heat treated : 1931°C - 1842°C

Technological Curves of steel grade 5 Ch 20 N 4 AG 9

Cross Reference Table (Equivalent Grade) of 5 Ch 20 N 4 AG 9

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