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KS STS420J1FB Details

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STS420J1FB Application:Stainless steel blooms and billets for forgings

Category Type Grade Microstructure Designations
Grades Stainless Steels STS420J1FB Martensite Korea - KS , D 3691 (2001) - Stainless steel blooms and billets for forgings

Chemical composition(wt.%) of STS420J1FB grade: D 3691 (2001)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.16 0.25
Si - 1.00
Mn - 1.00
P - 0.040
S - 0.030
Cr 12.00 14.00
Ni - 0.60
Mo - -
N - -
Stainless steel blooms and billets for forgings

Mechanical properties of grade STS420J1FB D 3691 (2001)

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
875 (≥) 319 (≥) 41 43 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical properties of grade STS420J1FB D 3691 (2001)

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
872 (≥) 467 (≥) 34 22 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 244
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
799 315 761

STS420J1FB - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
STS420J1 KS Korea
Stainless steel bars
STS420J1TKA KS Korea
Stainless steel pipes for machine and structural purposes
STS420J1FB KS Korea
Stainless steel blooms and billets for forgings

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