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Description

Germany DIN 1.4978 The high-temperature and high-strength steel and 1.4978 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Steel: 1.4978
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Steel 1.4978 DIN Germany The high-temperature and high-strength steel
1.4971
X12CrCoNi21-20
2.4973
NiCr19CoMo
NiFeCr12Mo
2.4975
NiCr20Mo
NiCr20Mo
1.4977
X40CoNi20-20

Chemical composition(mass fraction)(wt.%) of the 1.4978

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%) W(%) Co(%) Other(%)
0.45-0.55 Max 1.00 Max 1.50 Max 0.045 Max 0.030 19.0-21.0 19.0-21.0 3.50-4.50 3.50-4.50 19.0-21.0 3.50-4.50

Mechanical Properties of steel grade 1.4978

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)
846 (≥) 432 (≥) 42 24 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade 1.4978

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
24 - -     0.34 -  
714 681 - 21.3 442   -  
955 - 22 11.2   233 214

Heat Treatment of steel grade 1.4978

Heat treated : 1676°C - 1966°C

Technological Curves of steel grade 1.4978

Cross Reference Table (Equivalent Grade) of 1.4978

Grade Standard Country Application
1.4978 DIN Germany The high-temperature and high-strength steel

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