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Description

Korea KS D 3757 (2003), NCF625TB Specialsteel Seamless nickel-chromium-iron alloy heat exchanger tubes and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: NCF625TB
Category Class Grade Standard Country Application
Steel GradesSpecialsteel NCF625TB KS Korea Seamless nickel-chromium-iron alloy heat exchanger tubes

Chemical composition(mass fraction)(wt.%) of the NCF625TB

C Si Mn P S Cr Ni Cu Al Ti Fe Nb+Ta Mo
≤0.10 ≤0.50 ≤0.50 ≤0.015 ≤0.015 20.00 -23.00 58.00 - ≥ ≤ ≥ ≤0.40 ≤0.40 ≤5.00 3.15 -4.15 8.00 -10.00

Mechanical Properties of steel grade NCF625TB

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
144 (≥) 965 (≥) 21 21 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 111

Physical Properties of steel grade NCF625TB

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
13 - -     0.13 -  
512 856 - 12.3 223   -  
652 - 34 11.2   222 111

Heat Treatment of steel grade NCF625TB

Heat treated : 1725°C - 1682°C

Technological Curves of steel grade NCF625TB

Cross Reference Table (Equivalent Grade) of NCF625TB

Relevant standard of NCF625TB

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

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