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STS440A

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STS431 STS440B
#STS440A

Description

Korea KS STS440A martensitic steel and STS440A Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Heat-Resistant Steel: STS440A
Category Type Steel Grade Standard Country Application
Steel GradesHeat-Resistant Steel STS440A KS Korea martensitic steel
STS403
STS410
STS41oJl
STS41OF2
STS416
STS420J1
STS420J2
STS420F
STS420F2
STS431

Chemical composition(mass fraction)(wt.%) of the STS440A

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％)
0.60-0.75 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 STS440A

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)
138 (≥) 447 (≥) 14 42 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 134

Physical Properties of steel grade STS440A

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
33 - -     0.12 -  
654 744 - 33.3 442   -  
725 - 24 33.2   214 241

Heat Treatment of steel grade STS440A

Heat treated : 1636°C - 1627°C

Technological Curves of steel grade STS440A

Cross Reference Table (Equivalent Grade) of STS440A

Grade Standard Country Application
STS440A KS Korea martensitic steel
STS440A KS Korea martensitic steel
STS431 STS440B
Available Suppliers
Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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