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Description

Korea KS D 3698 (2008), D 3705 (2008), D 3706 (2008), STS440A Specialsteel Stainless steel bars and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: STS440A
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel STS440A Martensite KS Korea Stainless steel bars

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

C Si Mn P S Cr Ni Mo N
0.60 -0.75 ≤1.00 ≤1.00 ≤0.040 ≤0.030 16.00 -18.00 ≤0.60 ≤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)
383 (≥) 719 (≥) 33 41 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 331

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
32 - -     0.31 -  
141 911 - 24.3 423   -  
259 - 44 21.2   414 441

Heat Treatment of steel grade STS440A

Heat treated : 1412°C - 1353°C

Technological Curves of steel grade STS440A

Cross Reference Table (Equivalent Grade) of STS440A

Grade Standard Country Application
STS440A
STS440A

Relevant standard of STS440A

D 3698 (2008) Cold rolled stainless steel plates, sheets and strip D-3698-(2008).pdf
D 3705 (2008) Hot rolled stainless steel plates, sheets and strip D-3705-(2008).pdf
D 3706 (2008) Stainless steel bars D-3706-(2008).pdf

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