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Description

Korea KS D 3706 (2008), STS440B Specialsteel Stainless steel bars and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: STS440B
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel STS440B Martensite KS Korea Stainless steel bars

Chemical composition(mass fraction)(wt.%) of the STS440B

C Si Mn P S Cr Ni Mo N
0.75 -0.95 ≤1.00 ≤1.00 ≤0.040 ≤0.030 16.00 -18.00 ≤0.60 ≤0.75 ≤ ≥

Mechanical Properties of steel grade STS440B

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)
755 (≥) 631 (≥) 14 32 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

Physical Properties of steel grade STS440B

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
23 - -     0.24 -  
841 399 - 43.3 422   -  
462 - 23 23.2   312 132

Heat Treatment of steel grade STS440B

Heat treated : 1788°C - 1395°C

Technological Curves of steel grade STS440B

Cross Reference Table (Equivalent Grade) of STS440B

Grade Standard Country Application
STS440B
STS440B

Relevant standard of STS440B

D 3706 (2008) Stainless steel bars D-3706-(2008).pdf

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