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Description

China GBT 4J49 expansionalloy and 4J49 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 4J49
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy 4J49 GBT China expansionalloy
4J34
4J36
4J38
4J40
4J42
4J43
4J44
4J45
4J46
4J47

Chemical composition(mass fraction)(wt.%) of the 4J49

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) B(%) Fe(%)
0.05 ≤0.30 ≤0.40 0.020 0.020 5.0-6.0 46_0-48.0 ≤0.02 Bal

Mechanical Properties of steel grade 4J49

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)
549 (≥) 128 (≥) 13 21 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 322

Physical Properties of steel grade 4J49

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
42 - -     0.33 -  
944 154 - 11.3 123   -  
585 - 14 13.2   432 412

Heat Treatment of steel grade 4J49

Heat treated : 1913°C - 1585°C

Technological Curves of steel grade 4J49

Cross Reference Table (Equivalent Grade) of 4J49

Grade Standard Country Application
4J49 GBT China expansionalloy

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