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Description

China GBT 1J77 non-retentive alloy and 1J77 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 1J77
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy 1J77 GBT China non-retentive alloy
1J40
1J46
1J50
1J51
1J52
1J54
1J65
1J66
1J67
1J76

Chemical composition(mass fraction)(wt.%) of the 1J77

C(%) Si(%) Mn(%) P(%) S(%) Ni(%) Mo(%) Cu(%) Fe(%)
0.03 0.15-0.30 0.30-0.60 0.020 0.020 75.5-78.0 3.9-4.5 4.8-6.0 Bal

Mechanical Properties of steel grade 1J77

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)
314 (≥) 171 (≥) 11 21 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 134

Physical Properties of steel grade 1J77

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 - -     0.22 -  
177 826 - 31.3 324   -  
138 - 32 34.2   434 334

Heat Treatment of steel grade 1J77

Heat treated : 1669°C - 1571°C

Technological Curves of steel grade 1J77

Cross Reference Table (Equivalent Grade) of 1J77

Grade Standard Country Application
1J77 GBT China non-retentive alloy

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