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NiFe25Cr20NbTi

Description

International ISO ISO 683-15 (1992), NiFe25Cr20NbTi Specialsteel Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: NiFe25Cr20NbTi
Category Class Grade Standard Country Application
Steel GradesSpecialsteel NiFe25Cr20NbTi ISO International Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the NiFe25Cr20NbTi

C Si Mn P S Cr Mo Ni Al Fe Nb+Ta B
≤0.10 ≤1.00 ≤1.00 ≤0.030 ≤0.015 18.00 -21.00 ≤ ≥ remaining - ≥ 0.30 -1.00 23.00 -28.00 1.00 -2.00 ≤0.008

Mechanical Properties of steel grade NiFe25Cr20NbTi

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)
679 (≥) 691 (≥) 14 24 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical Properties of steel grade NiFe25Cr20NbTi

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
43 - -     0.21 -  
243 441 - 42.3 341   -  
579 - 11 23.2   421 441

Heat Treatment of steel grade NiFe25Cr20NbTi

Heat treated : 1489°C - 1993°C

Technological Curves of steel grade NiFe25Cr20NbTi

Cross Reference Table (Equivalent Grade) of NiFe25Cr20NbTi

Grade Standard Country Application
NiFe25Cr20NbTi
NiFe25Cr20NbTi
NiFe25Cr20NbTi

Relevant standard of NiFe25Cr20NbTi

ISO 683-15 (1992) Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines ISO-683-15-(1992).pdf

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