STSF6B Stainless Steels to D 4115 (2001)

STSF6B - Specification & Application

  • D 4115 (2001) - Stainless steel forgings for pressure vessels

Stainless steel forgings for pressure vessels

Chemical composition(wt.%) of STSF6B grade: to D 4115 (2001)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.15
Si - 1.00
Mn - 1.00
P - 0.020
S - 0.020
Cr 11.50 13.50
Ni 1.00 2.00
Mo 0.40 0.60
Cu - 0.50

STSF6B - Detail

Stainless steel forgings for pressure vessels

Mechanical properties of grade STSF6B 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)
142 (≥) 686 (≥) 31 44 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 242

Physical properties of grade STSF6B 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
875 (≥) 126 (≥) 11 13 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 344
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
777 675 632

Equivalent Grade

Equivalent Products

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