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Description

China GBT 4J50 expansionalloy and 4J50 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 4J50
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy 4J50 GBT China expansionalloy
4J36
4J38
4J40
4J42
4J43
4J44
4J45
4J46
4J47
4J49

Chemical composition(mass fraction)(wt.%) of the 4J50

C(%) Si(%) Mn(%) P(%) S(%) Ni(%) Al(%) Fe(%)
0.05 ≤0.30 ≤0.80 0.020 0.020 49.5-50.5 ≤0.1 Bal

Mechanical Properties of steel grade 4J50

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)
823 (≥) 659 (≥) 23 43 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 444

Physical Properties of steel grade 4J50

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 - -     0.32 -  
217 153 - 12.3 232   -  
244 - 14 21.2   413 141

Heat Treatment of steel grade 4J50

Heat treated : 1416°C - 1283°C

Technological Curves of steel grade 4J50

Cross Reference Table (Equivalent Grade) of 4J50

Grade Standard Country Application
4J50 GBT China expansionalloy

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