STR660 Stainless Steels to D 3731 (2002)

STR660 - 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 STR660 grade: to D 3731 (2002)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.040
S - 0.030
Cr 13.50 16.00
Ni 24.00 27.00
Mo 1.00 1.50
N - -
Al - 0.35
Ti 1.90 2.35
V 0.10 0.50
B 0.001 0.010

STR660 - Detail

Heat - resisting steel plates and sheets

Mechanical properties of grade STR660 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)
498 (≥) 668 (≥) 12 21 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

Physical properties of grade STR660 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
168 (≥) 441 (≥) 42 13 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 413
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
263 855 363

Equivalent Grade

Equivalent Products

We can customize the production of STR660 grade, contact us for the best solution.
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