NCF625TB Stainless Steels to D 3757 (2003)

NCF625TB - Specification & Application

  • D 3757 (2003) - Seamless nickel-chromium-iron alloy heat exchanger tubes

Seamless nickel-chromium-iron alloy heat exchanger tubes

Chemical composition(wt.%) of NCF625TB grade: to D 3757 (2003)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.10
Si - 0.50
Mn - 0.50
P - 0.015
S - 0.015
Cr 20.00 23.00
Ni 58.00 -
Cu - -
Al - 0.40
Ti - 0.40
Fe - 5.00
Nb+Ta 3.15 4.15
Mo 8.00 10.00

NCF625TB - Detail

Seamless nickel-chromium-iron alloy heat exchanger tubes

Mechanical properties of grade NCF625TB D 3757 (2003)

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)
131 (≥) 271 (≥) 21 21 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

Physical properties of grade NCF625TB D 3757 (2003)

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
276 (≥) 515 (≥) 23 12 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 211
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
187 343 831

Equivalent Products

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