NCF 690 Stainless Steels to G 4902 (1991)

NCF 690 - Specification & Application

  • G 4902 (1991) - Corrosion-resisting and heat-resisting superalloy plates and sheets

Corrosion-resisting and heat-resisting superalloy plates and sheets

Chemical composition(wt.%) of NCF 690 grade: to G 4902 (1991)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.05
Si - 0.50
Mn - 0.50
P - 0.03
S - 0.015
Cr 27.00 31.00
Ni 58.00 -
Cu - 0.50
Al - -
Ti - -
Fe - -

NCF 690 - Detail

Corrosion-resisting and heat-resisting superalloy plates and sheets

Mechanical properties of grade NCF 690 G 4902 (1991)

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)
529 (≥) 845 (≥) 21 34 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical properties of grade NCF 690 G 4902 (1991)

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
645 (≥) 851 (≥) 44 41 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 242
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
925 173 183

Equivalent Products

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