Alloy 625 Tubing

Alloy 625 is an austenitic nickel alloy resistant to crevice corrosion and oxidation, specifically under a wide range of temperatures from cryogenic to 1800°F. This makes the product well suited for nuclear and aerospace applications. The main feature of alloy 625 is the addition of niobium which increases the strength of the tubing without heat treating.

Product Specifications
ASME SB444 /ASTM B444, NACE MR0175

ALLOY 625 (UNS N06625) CHEMICAL COMPOSITION % (MAX.)
Cr
Chromium
Ni
Nickel
C
Carbon
Mo
Molybdenum
Mn
Manganese
Si
Silicon
P
Phosphorous
S
Sulfur
Fe
Iron
Co
Cobalt
Nb+Ta
Niobium-Tantalum
Al
Aluminum
Ti
Titanium
20.0-23.058.00.108.0-10.00.500.500.0150.0155.01.03.15-4.150.400.40
DIMENSIONAL TOLERANCES
OUTSIDE DIAMETER (OD)OD TOLERANCEWALL TOLERANCE
3/16” – 0.5”, Excl+.004”/-.000”+/- 10%
0.5” – 1.25”, Excl+.005”/-.000”+/- 10%
FABRICATION
Alloy 625 has excellent forming and welding characteristics, but is prone to work hardening.
TYPICAL APPLICATIONS
Offshore, Subsea,  Aerospace,  Nuclear,  Heat Exchangers Offshore Applications,  Chemical Processing
SIZE RANGE
Outside Diameter (OD)Wall Thickness
3/8” – 3/4”.035” – .095”
MECHANICAL PROPERTIES
YIELD STRENGTH60 KSI min.
TENSILE STRENGTH120 KSI min.
ELONGATION (MINIMUM 2 INCHES)30%

Alloy 625 Tubing (Printable PDF document)