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STS420J1 Application:martensitic steel
Category Type Steel grade Standard Country
Grades Special Alloy STS420J1 KS Korea

Chemical composition % of the ladle analysis of grade 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
STS420J1
Mechanical properties of grade STS420J1
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)
312 (≥) 224 (≥) 23 24 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 112
Physical properties of grade STS420J1
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
239 (≥) 417 (≥) 43 33 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 312
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
155 592 219
STS420J1 Range of products
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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