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Description

China GBT 9Cr18 Martensitic Steel and 9Cr18 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Steel: 9Cr18
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Steel 9Cr18 GBT China Martensitic Steel
Y1Cr13
1Cr13Mo
2Cr13
3Cr13
Y3Cr13
3Cr13Mo
4Cr13
1Cr17Ni2
7Cr17
8Cr17

Chemical composition(mass fraction)(wt.%) of the 9Cr18

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%)
0.90-1.00 Max 0.80 Max 0.80 0.035 Max 0.03 17.00-19.00 Max 0.60 Max 0.75

Mechanical Properties of steel grade 9Cr18

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)
741 (≥) 342 (≥) 42 21 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

Physical Properties of steel grade 9Cr18

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
22 - -     0.32 -  
686 972 - 31.3 234   -  
859 - 31 31.2   433 414

Heat Treatment of steel grade 9Cr18

Heat treated : 1464°C - 1581°C

Technological Curves of steel grade 9Cr18

Cross Reference Table (Equivalent Grade) of 9Cr18

Grade Standard Country Application
(G)9Cr18 GBT China China structural steel and alloy steel
(G)9Cr18Mo GBT China China structural steel and alloy steel
9Cr18 GBT China Martensitic Steel
9Cr18Mo GBT China Martensitic Steel
9Cr18MoV GBT China Martensitic Steel

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