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Description

Korea KS D 3757 (2003), NCF690TB Specialsteel Seamless nickel - chromium - iron alloy heat exchanger tubes and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: NCF690TB
Category Class Grade Standard Country Application
Steel GradesSpecialsteel NCF690TB KS Korea Seamless nickel - chromium - iron alloy heat exchanger tubes

Chemical composition(mass fraction)(wt.%) of the NCF690TB

C Si Mn P S Cr Ni Cu Al Ti Fe
≤0.05 ≤0.50 ≤0.50 ≤0.030 ≤0.015 27.00 -31.00 58.00 - ≥ ≤0.50 ≤ ≥ ≤ ≥ ≤ ≥

Mechanical Properties of steel grade NCF690TB

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)
725 (≥) 555 (≥) 11 31 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade NCF690TB

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
22 - -     0.41 -  
469 386 - 31.3 241   -  
789 - 21 13.2   211 431

Heat Treatment of steel grade NCF690TB

Heat treated : 1798°C - 1151°C

Technological Curves of steel grade NCF690TB

Cross Reference Table (Equivalent Grade) of NCF690TB

Relevant standard of NCF690TB

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

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