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JIS NCF 825 TB Details

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NCF 825 TB Application:Seamless nickel-chromium-iron alloy heat exchanger tubes

Category Type Grade Designations
Grades Stainless Steels NCF 825 TB Japan - JIS , G 4904 (2008) - Seamless nickel-chromium-iron alloy heat exchanger tubes

Chemical composition(wt.%) of NCF 825 TB grade: G 4904 (2008)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.05
Si - 1.00
Mn - 1.00
P - 0.03
S - 0.015
Cr 19.50 23.00
Ni 38.00 46.00
Cu 1.50 3.00
Al - 0.20
Ti 0.60 1.20
Fe remaining -
Mo 2.50 3.50
Seamless nickel-chromium-iron alloy heat exchanger tubes

Mechanical properties of grade NCF 825 TB G 4904 (2008)

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)
182 (≥) 446 (≥) 13 13 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 314

Physical properties of grade NCF 825 TB G 4904 (2008)

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
154 (≥) 177 (≥) 12 41 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 241
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
193 397 171

NCF 825 TB - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
NCF 825 JIS Japan
Corrosion-resisting and heat-resisting superalloy bars
NCF 825 JIS Japan
Corrosion-resisting and heat-resisting superalloy plates and sheets
NCF 825 TB JIS Japan
Seamless nickel-chromium-iron alloy heat exchanger tubes
NCF 825 TP JIS Japan
Seamless nickel-chromium-iron alloy pipes

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