DIN 17744 17750 17751 17752 17753
2.4856 Characteristic as below:
1. Excellent
corrosion resistance of different kinds of media in both
oxidation and reduction environments.
2. Excellent resistance of pitting and
crevice corrosion, and won't happen
stress corrosion cracking because of chloride.
3.Excellent resistance of the inorganic acid
corrosion performance, such as
nitric acid,
phosphoric acid,
sulfuric acid, hydrochloric acid and the mixture of sulfuric acid and
hydrochloric acid.
4. Excellent corrosion resistance of different kinds of inorganic acid mixture performance.
5. Good corrosion resistance of a variety of concentrations of hydrochloric acid when the temperature up to 40 °C
6. Good machining and welding, no weld cracking sensitivity.
7. Have
pressure vessel authentication for the wall
temperature between -196-450°C
8. Apply for the highest
standard lever VII of acidic environment by the NACE MR-01-75 authorized.
Inconel 625 2.4856Metallurgical structure
625 is face-centered cubic lattice structure. Dissolve out the carbon granule and instability quaternary phase, then change it to stability Ni3 (Nb,Ti) trimetric lattice around 650°C after a long time heat preservation.
nickel-chromium content will strength the mechanical performance in the state solution while suppress the plasticity
DIN 17744 17750 17751 17752 17753 2.4856 Corrosion resistance
2.4856 own a very good
corrosion resistance in many media, especially with excellent resistance to pitting, crevice corrosion, intercrystalline corrosion, and erode in oxide, also good resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid and hydrochloric acid. 625 can resist the alkali and organic acid corrosion in the oxidation and reduction environment. Effect resists the chloride reduction stress corrosion cracking. Normally no corrosion in the sea-water and industry environments since high corrosion resistance to the
sea-water and salting liquid,as well as in high temperature, without sensitivity during welding. 625 have the resistance to oxidation and carbonizing in the static and cycle environments, also hacve the resistance the chlorine corrosion.
Inconel 625 2.4856 Application field
Soften annealing low carbon alloy 625 widely used in the chemical process industry, good corrosion resistance and high strength made it an good choice for structural parts. 625 have application in sea-water for local mechanical stress attach.
Fabrication with Inconel 625 2.4856
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° F. 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-hardening 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.
