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China GB 1J18 精密合金牌号 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 1J18 / 1J18
Category Grade Standard Region/Area Standard Content
Metals 1J18 GB/T 15018 China 精密合金牌号

Chemical composition(mass fraction)(wt.%) of the 1J18

Element Min Max Similar
Ti 0.3000 0.7000 -
Fe - - -
Cr 17.0000 18.5000 -
Ni 0.5000 0.7000 -
Si - 0.1500 -
Mn 0.3000 0.7000 -
P - 0.0200 -
S - 0.0200 -
C - 0.0300 -

Mechanical Properties of steel grade 1J18

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)
618 (≥) 977 (≥) 33 14 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade 1J18

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
31 - -     0.14 -  
988 686 - 43.3 221   -  
776 - 21 14.2   441 133

Heat Treatment of steel grade 1J18

Heat treated : 1616°C - 1764°C

Technological Curves of steel grade 1J18

Cross Reference Table (Equivalent Grade) of 1J18

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