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Description

Korea KS D 3691 (2001), STS431FB Specialsteel Stainless steel blooms and billets for forgings and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: STS431FB
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel STS431FB Martensite KS Korea Stainless steel blooms and billets for forgings

Chemical composition(mass fraction)(wt.%) of the STS431FB

C Si Mn P S Cr Ni Mo N
≤0.20 ≤1.00 ≤1.00 ≤0.040 ≤0.030 15.00 -17.00 1.25 -2.50 ≤ ≥ ≤ ≥

Mechanical Properties of steel grade STS431FB

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)
775 (≥) 166 (≥) 31 11 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 322

Physical Properties of steel grade STS431FB

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
14 - -     0.14 -  
678 341 - 24.3 314   -  
494 - 31 23.2   431 411

Heat Treatment of steel grade STS431FB

Heat treated : 1626°C - 1567°C

Technological Curves of steel grade STS431FB

Cross Reference Table (Equivalent Grade) of STS431FB

Grade Standard Country Application
STS431
STS431

Relevant standard of STS431FB

D 3691 (2001) Stainless steel blooms and billets for forgings D-3691-(2001).pdf

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