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Description

Korea KS STS420J1 martensitic steel and STS420J1 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: STS420J1
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy STS420J1 KS Korea martensitic steel
STS430
STS430F
STS434
STS447J1
STSXM27
STS403
STS410
STS41oJl
STS41OF2
STS416

Chemical composition(mass fraction)(wt.%) of the STS420J1

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%)
0.16-O.25 Max 1.00 Max 1.00 Max 0.04 Max 0.03 12.0-14.O Max 0.60

Mechanical Properties of steel grade STS420J1

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)
554 (≥) 655 (≥) 31 31 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 131

Physical Properties of steel grade STS420J1

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 - -     0.34 -  
382 761 - 13.3 242   -  
747 - 21 33.2   244 343

Heat Treatment of steel grade STS420J1

Heat treated : 1882°C - 1714°C

Technological Curves of steel grade STS420J1

Cross Reference Table (Equivalent Grade) of STS420J1

Grade Standard Country Application
STS420J1 KS Korea martensitic steel
STS420J1 KS Korea martensitic steel
STS420J1TKA KS Korea KS standard mechanical and structure with stainless steel pipe(KS D3536-1992)

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