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Description

France AFNOR 1.4748 Valve Internal Combustion Engines steel (NF-EN 1009-1998) and 1.4748 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Valve Steel: 1.4748
Category Type Steel Grade Standard Country Application
Steel GradesValve Steel 1.4748 AFNOR France Valve Internal Combustion Engines steel (NF-EN 1009-1998)
1.4866
X53CrMnNiN21-9
1.4871
X55CrMnNiN20-8
1.4875
X50CrMnNiNbN21-9
1.4882
X53CrMnNiNbN21-9
1.4870
X85CrMoV18-2

Chemical composition(mass fraction)(wt.%) of the 1.4748

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Mo(%) V(%)
0.80-0.90 Max 1.50 Max 1.50 Max 0.040 Max 0.030 16.5-18.5 2.00-2.50 0.30-0.60

Mechanical Properties of steel grade 1.4748

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)
793 (≥) 965 (≥) 32 43 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 134

Physical Properties of steel grade 1.4748

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
41 - -     0.41 -  
519 516 - 32.3 144   -  
151 - 34 31.2   321 212

Heat Treatment of steel grade 1.4748

Heat treated : 1786°C - 1447°C

Technological Curves of steel grade 1.4748

Cross Reference Table (Equivalent Grade) of 1.4748

Grade Standard Country Application
1.4748 DIN Germany Valve steel
1.4748 AFNOR France Valve Internal Combustion Engines steel (NF-EN 1009-1998)

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