Alloy 825 Tubing

Alloy 825 is an austenitic nickel-iron-chromium alloy also defined by 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 cryogenic temperatures to 1,000° F.

Product Specifications
ASTM B163 /ASME SB163, ASTM B829, NACE MR0175

ALLOY 825 (UNS N08825) CHEMICAL COMPOSITION % (MAX.)
Cr
Chromium
Ni
Nickel
C
Carbon
Mo
Molybdenum
Mn
Manganese
Si
Silicon
S
Sulfur
Fe
Iron
Cu
Copper
Al
Aluminum
Ti
Titanium
19.5-23.538.0-46.00.052.5-3.51.00.500.0322.0 (min)1.5-3.00.20.6-1.2
DIMENSIONAL TOLERANCES
OUTSIDE DIAMETER (OD)OD TOLERANCEWALL TOLERANCE
3/8” Tubes+.004”/-.000”+/- 10%
1/2” Tubes+.005”/-.000”+/- 10%
FABRICATION
This material has excellent formability, typical of nickel- base alloys, allowing the material to be bent to extremely small radii. Annealing after bending is not normally necessary. Upon request, PAC Stainless will provide additional information regarding the heating, hot or cold forming, machining and welding of Alloy 825 product.
TYPICAL APPLICATIONS
Oil & Gas Production, Sour Gas & Oil Wells, Acid Production, Sulphuric & Phosphoric Pollution Control, Sulfur-Containing Flue Gas, Pickling Operations,  Heating Coils & Tanks,  Radioactive Waste Handling,  Fuel Element Dissolvers Food Processing Equipment
SIZE RANGE
Outside Diameter (OD)Wall Thickness
1/4” – 3/4”.035” – .065”
Cold Finished and Bright Annealed Tube
MECHANICAL PROPERTIES
YIELD STRENGTH 0.2% Offset35 KSI min.
TENSILE STRENGTH85 KSI min.
ELONGATION (MINIMUM 2 INCHES)30%

Alloy 825 Tubing (Printable PDF document)