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Description

Korea KS STS440C martensitic steel and STS440C Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: STS440C
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy STS440C KS Korea martensitic steel
STS41oJl
STS41OF2
STS416
STS420J1
STS420J2
STS420F
STS420F2
STS431
STS440A
STS440B

Chemical composition(mass fraction)(wt.%) of the STS440C

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%)
0.95-1.20 Max 1.00 Max 1.00 Max 0.04 Max 0.03 16.0-18.O Max 0.60 Max 0.75

Mechanical Properties of steel grade STS440C

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)
654 (≥) 348 (≥) 31 22 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 342

Physical Properties of steel grade STS440C

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
44 - -     0.41 -  
286 745 - 44.3 313   -  
715 - 22 14.2   112 214

Heat Treatment of steel grade STS440C

Heat treated : 1626°C - 1649°C

Technological Curves of steel grade STS440C

Cross Reference Table (Equivalent Grade) of STS440C

Grade Standard Country Application
STS440C KS Korea martensitic steel
STS440C KS Korea martensitic steel

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