STR446 Stainless Steels to D 3731 (2002)

STR446 - Specification & Application

  • D 3731 (2002) - Heat - resisting steel bars
  • D 3732 (2002) - Heat - resisting steel plates and sheets

Heat - resisting steel plates and sheets

Chemical composition(wt.%) of STR446 grade: to D 3731 (2002)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.20
Si - 1.00
Mn - 1.50
P - 0.04
S - 0.03
Cr 23.00 27.00
Ni - 0.60
Mo - -
N - 0.25
Cu - 0.30

STR446 - Detail

Heat - resisting steel plates and sheets

Mechanical properties of grade STR446 D 3731 (2002)

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)
713 (≥) 298 (≥) 21 33 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 314

Physical properties of grade STR446 D 3731 (2002)

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
131 (≥) 996 (≥) 23 12 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 342
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
568 532 781

Equivalent Grade

Equivalent Products

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