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Home Material JIS G 4904-2017
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Grade NCF825TB
Corresponding Standard JIS G 4904-2017
Seamless Nickel-Chromium-Iron Alloy Heat Exchanger Tubes
Classification Alloy Steel
Properties Corrosion Resistance
NCF825TB Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni * Cu Mo Ti Al More
Minimum Value - - - - - 19.5 38 1.5 2.5 0.6 - Fe:余量
Maximum Value 0.05 0.5 1 0.03 0.015 23.5 46 3 3.5 1.2 0.2
NCF825TB Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
Steel pipe Annealing ≥580 ≥235 ≥30 ≤90
Steel pipes; 1<t≤2 Annealing ≥21
Steel pipe; 2<t≤3 Annealing ≥22
Steel pipe; 3<t≤4 Annealing ≥24
Steel pipe; 4<t≤5 Annealing ≥26
Steel pipe; 5<t≤6 Annealing ≥27
Steel pipe; 6<t≤7 Annealing ≥28
Steel pipe; 7 < t < 8 Annealing ≥30

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