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KS STSF321 Details

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STSF321 Application:Stainless steel forgings for pressure vessels

Category Type Grade Microstructure Designations
Grades Stainless Steels STSF321 Austenite Korea - KS , D 4115 (2001) - Stainless steel forgings for pressure vessels

Chemical composition(wt.%) of STSF321 grade: D 4115 (2001)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.040
S - 0.030
Cr 17.00 19.00
Ni 9.00 13.00
Mo - -
Ti - 5×C%
Stainless steel forgings for pressure vessels

Mechanical properties of grade STSF321 D 4115 (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)
795 (≥) 571 (≥) 24 23 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical properties of grade STSF321 D 4115 (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
983 (≥) 197 (≥) 21 32 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 113
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
464 486 713

STSF321 - 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
STSF321 KS Korea
Stainless steel forgings for pressure vessels
STSF321H KS Korea
Stainless steel forgings for pressure vessels

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