Inconel 625 Tube

Inconel 625 is a nonmagnetic, corrosion and oxidation resistant, nickel-base alloy. It has high strength and toughness in the temperature range cryogenic to 2000 F degree(1093 Centigrade) which is derived largely from the solid solution effects of the refractory metals, columbium and molybdenum, in a nickel-chromium matrix. Alloy 625 has excellent fatigue strength and stress-corrosion cracking resistance to chloride ions.

Typical applications for Inconel 625 have included heat shields, furnace hardware, gas turbine engine ducting, combustion liners and spray bars, chemical plant hardware and special seawater applications.

Inconel 625 seamless pipe is available up to 8" NB. Larger sizes are available in welded construction (100% X-ray) and can also be fabricated to order. Inconel 625 tubing (welded & seamless) is available up 3" OD to both aerospace (AMS 5581) and commercial (ASTM B444) specifications. Redrawn tubes and tubing with tight tolerances can be supplied in almost any size no matter how small the size or quantity.

Chemical Composition, %

Size:

Out diameter 1/8''-8'',

Wall thickness Sch5s-XXS

Length 1m-12m

Type: seamless, welded

Standard: ASTM B444, ASTM B751, ASTM B705, ASTM B704, AMS 5581

The characteristics of Inconel 625

High creep-rupture strength
Oxidation resistant to 1800 Fahrenheit degree
Seawater pitting and crevice corrosion resistant
Immune to chloride ion stress corrosion cracking
Non-magnetic

Fabrication with Inconel 625

Alloy 625 has excellent forming and welding characteristics. It may be forged or hot worked providing temperature is maintained in the range of about 1800-2150 Fahrenheit degree. Ideally, to control grain size, finish hot working operations should be performed at the lower end of the temperature range. Because of its good ductility, alloy 625 is also readily formed by cold working. However, the alloy does work-harden rapidly so intermediate annealing treatments may be needed for complex component forming operations. In order to restore the best balance of properties, all hot or cold worked parts should be annealed and rapidly cooled. This nickel alloy can be welded by both manual and automatic welding methods, including gas tungsten arc, gas metal arc, electron beam and resistance welding. It exhibits good restraint welding characteristics.

Applications
Aircraft ducting systems
Jet engine exhaust systems
Engine thrust-reverser systems
Bellows and expansion joints
Turbine shroud rings
Flare stacks
Seawater components
Chemical process equipment handling mixed acids both oxidizing and reducing.