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1.4978

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1.4977 1.4944
#1.4978

Description

1.4978 High Alloy and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:High Alloy: 1.4978
Category Type Steel Grade Standard Country Application
Steel GradesHigh Alloy 1.4978
1.4962
2.4964
2.4969
2.4632
1.4974
1.4971
2.4973
2.4975
2.4976
1.4977

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

 

 

 

C  Si 
≤		 Mn 
≤		  P
≤		  S
≤		 Cr   Ni  Mo  Other
 0.45-0.55  1.00  1.50  0.045  0.030  19.0-21.0 19.0-21.0   3.50-4.50

 Co 19.0-21.0   W 3.50-4.50
Nb / Ta 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)
683 (≥) 142 (≥) 22 33 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 241

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
21 - -     0.33 -  
189 945 - 24.3 322   -  
443 - 43 41.2   422 131

Heat Treatment of steel grade 1.4978

Heat treated : 1288°C - 1877°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
1.4977 1.4944
Available Suppliers
Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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