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China HB 4J49 膨胀合金热处理工艺说明书 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4J49 / 4J49
Category Grade Standard Region/Area Standard Content
Metals 4J49 HB/Z 239 China 膨胀合金热处理工艺说明书

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

Element Min Max Similar

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)
594 (≥) 176 (≥) 31 22 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

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
24 - -     0.11 -  
848 362 - 11.3 323   -  
763 - 21 44.2   443 433

Heat Treatment of steel grade 4J49

Heat treated : 1485°C - 1272°C

Technological Curves of steel grade 4J49

Cross Reference Table (Equivalent Grade) of 4J49

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