ALLOY 825

825 is an austenitic nickel-iron-chromium alloy also defined by Alloy additions of molybdenum, copper and titanium. It was developed to provide exceptional resistance to numerous corrosive environments, both oxidizing and reducing. With a nickel content range between 38-46%, this grade exhibits pronounced resistance to stress corrosion cracking (SCC) induced by chlorides and alkalis. The chromium and molybdenum content provides good pitting resistance in all environments except strongly oxidizing chloride solutions. Utilized as an effective material in a wide variety of process environments, Alloy 825 maintains good mechanical properties from cyrogenic temperatures to 1,000 ° E

PRODUCTION SPECIFICATIONS

ASTM B163/ASME SB163, ASTM B829, NACE MRO175

ALLOY 825 (UNS NO8825) CHEMICAL COMPOSITION % (MAX.)

Ni
Fe
Cr
Mo
Cu
TI
C
Mn
S
Si
Al
Nickel
Iron
Chromium
Molybdenum
Copper
Titanium
Carbon
Manganese
Sulfur
Silicon
Aluminum
38.0-46.0
22.0 (Min)
19.5-23.5
2.5-3.5
1.5-3.0
.6-1.2
.05
1.0
.03
.05
0.2

 

Typical Applications

 Acid Production—Su|phuric and Phosphoric Acid
Oil and Gas Production—Sour Gas and Oil Wells
Pickling Operations—Heating Coils and Tanks
Radioactive Waste Hand|ing
Food Processing Equipment

 

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