Incoloy 825, NS1402, 2.4858, NCF825 Nickel Base Corrosion Resistant Alloy- TJC STEEL.

​Incoloy®825 is a Ni-Fe-Cr austenite alloy with molybdenum, copper and titanium added.Special corrosion resistance in oxidizing and reducing [TJC STEEL]environments.Incoloy is a registered trademark of Special Metals, Inc.

National Standard
CHINA GB/T 15007-2008
GB/T  15008-2008
GB/T  2054-2013
YB/T  5353-2012
YB/T  5354-2006
YB/T  5355-2006 NS1402（NS142）
AMERICA Special  Metals INCOLOY® alloy 825
ASTM B423
ASTM B424
ASTM B425[TJC STEEL]
ASTM B564 UNS  N08825
JAPAN JIS G 4901
JIS G 4902 NCF825
GERMANY DIN  17744
DIN  17750
DIN  17751
DIN  17752
DIN  17753 NiCr21Mo
2.4858

Component Specification
GRADE NS1402 N08825 2.4858 NCF825
C ≤0.05 ≤0.05 ≤0.025 ≤0.05
Si ≤0.50 ≤0.50 ≤0.50 ≤0.50
Mn ≤1.00 ≤1.00 ≤1.00 ≤1.00
P ≤0.030 -- ≤0.020 ≤0.030
S ≤0.030 ≤0.030 ≤0.015 ≤0.015
Ni 38.0~46.0 38.0~46.0 38.0~46.0 38.0~46.0
Cr 19.0~23.5 19.5~23.5 19.5~23.5 19.5~23.5
Mo 2.5~3.5 2.5~3.5[TJC STEEL] 2.5~3.5 2.5~3.5
Cu 1.5~3.0 1.5~3.0 1.5~3.0 1.5~3.0
Ti 0.60~1.20 0.6~1.2 0.60~1.20 0.6~1.2
Al ≤0.20 ≤0.20 ≤0.20 ≤0.20
Co -- -- ≤1.00 --
Fe -- ≥22.0 Other --


Corrosion Resistance：
The 825 is resistant to corrosion in a variety of processing environments, including sulfuric acid, sulfurous acid, phosphoric acid, nitric acid, hydrofluoric acid, organic acid and alkali such as sodium, potassium hydroxide, acid [TJC STEEL]chloride, etc.
Compared with ordinary austenitic stainless steels, the nickel in alloy 825 makes it resistant to chloride stress corrosion, while molybdenum and copper make it highly resistant to corrosion in reduced environments.Chromium and molybdenum are resistant to chloride pitting and corrosion in various oxidizing environments.The addition of titanium makes the material more stable and less susceptible to sensitization [TJC STEEL]during welding.This insensitive property allows the material to resist intergranular corrosion even when exposed to the sensitive temperature range.

Mechanical Properties Of：
825 alloy has good mechanical properties in low and medium temperature environments.At 540°C, the microstructure of[TJC STEEL] the material will change and the ductility and impact strength will decrease significantly. Therefore, it is not suitable for applications where creep fracture resistance is a design factor.
Alloy 825 can be fully strengthened by cold working.Has good impact strength at room temperature and can maintain this strength at low temperatures.

Applications：
As a typical nickel-based alloy, 825 alloy is easy to be formed and welded through technical processing.Application occasions [TJC STEEL]for petroleum exploitation, chemical equipment, such as heat exchanger and condenser;Components used in sulfuric acid environment and acid gas containing a variety of ions;Pipelines and coolers for oil and steam;Nuclear waste disposal plant.