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KS STSF304 Details

Stainless steel forgings for pressure vessels

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STSF304 Application:Stainless steel forgings for pressure vessels
Category Type Grade Microstructure Designations
Grades Stainless Steels STSF304 Austenite Korea - KS , D 4115 (2001) - Stainless steel forgings for pressure vessels
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.040
S - 0.030
Cr 18.00 20.00
Ni 8.00 11.00
Mo - -
Mechanical properties of grade STSF304
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)
444 (≥) 842 (≥) 33 14 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 332
Physical properties of grade STSF304
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
577 (≥) 736 (≥) 14 13 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 143
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
311 828 382
STSF304 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
STSF304 KS Korea
Stainless steel forgings for pressure vessels
STSF304H KS Korea
Stainless steel forgings for pressure vessels
STSF304L KS Korea
Stainless steel forgings for pressure vessels
STSF304LN KS Korea
Stainless steel forgings for pressure vessels
STSF304N KS Korea
Stainless steel forgings for pressure vessels