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4 Ch 9 S 3

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Bulgaria BDS 4Ch9S3 High alloyed steels for internal combustion engine valves. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4Ch9S3 / 4 Ch 9 S 3
Category Grade Standard Region/Area Standard Content
Metals 4 Ch 9 S 3 BDS 9634 Bulgaria High alloyed steels for internal combustion engine valves. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 4 Ch 9 S 3

Element Min Max Similar
Si 2.5000 3.5000 -
S - 0.0300 -
P - 0.0300 -
Mn - 0.8000 -
Cr 8.0000 10.0000 -
C 0.4000 0.5000 -

Mechanical Properties of steel grade 4 Ch 9 S 3

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)
492 (≥) 814 (≥) 44 23 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 142

Physical Properties of steel grade 4 Ch 9 S 3

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 - -     0.41 -  
265 954 - 41.3 444   -  
726 - 23 33.2   234 431

Heat Treatment of steel grade 4 Ch 9 S 3

Heat treated : 1478°C - 1787°C

Technological Curves of steel grade 4 Ch 9 S 3

Cross Reference Table (Equivalent Grade) of 4 Ch 9 S 3

Grade Standard Country Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1
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