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1.4870

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X53CrMnNiNbN21-9 X85CrMoV18-2
#X53CrMnNiNbN21-9 #1-4870

Description

France AFNOR NF EN 10090, 1.4870 Specialsteel Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 1.4870
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 1.4870 AFNOR France Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the 1.4870

C Si Mn P S Cr Ni Mo N C+N
0.48 -0.58 ≤0.45 8.00 -10.00 ≤0.045 ≤0.030 20.00 -22.00 3.25 -4.50 ≤ ≥ 0.38 -0.50 0.90 - ≥

Mechanical Properties of steel grade 1.4870

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)
877 (≥) 977 (≥) 31 41 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 414

Physical Properties of steel grade 1.4870

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
22 - -     0.21 -  
566 394 - 41.3 424   -  
781 - 22 33.2   323 333

Heat Treatment of steel grade 1.4870

Heat treated : 1498°C - 1923°C

Technological Curves of steel grade 1.4870

Cross Reference Table (Equivalent Grade) of 1.4870

Grade Standard Country Application
X53CrMnNiNbN21-9
X53CrMnNiNbN21-9

Relevant standard of 1.4870

NF EN 10090 Valve steels and alloys for internal combustion engines NF-EN-10090.pdf
X53CrMnNiNbN21-9 X85CrMoV18-2
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