Inconel 625 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℃
6. Good machining and welding, no weld cracking sensitivity.
7. Have pressure vessel authentication for the wall temperature between -196-450℃
8. Apply for the highest standard lever VII of acidic environment by the NACE MR-01-75 authorized.
Inconel 625 2.4856 Metallurgical
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℃ after a long time heat preservation. nickel-chromium content will strength the mechanical
performance in the state solution while suppress the plasticity
Inconel 625 2.4856 Corrosion resistance
625 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-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.
Inconel 625 Alloy Specification:
ASME SB163 Standard Specification for Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes
ASME SB165 Standard Specification for Nickel-Copper Alloy (UNS N04400)* Seamless Pipe and Tube
ASME SB167 Standard Specification for Nickel-Chromium-Iron Alloys, Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617),and Nickel-Iron-Chromium-Tungsten Alloy (UNS N06674) Seamless Pipe and Tube
ASME SB407 Standard Specification for Nickel-Iron-Chromium Alloy Seamless Pipe and Tube
ASME SB423 Standard Specification for Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825, N08221, and N06845) Seamless Pipe and Tube
ASME SB444 Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloys (UNS N06625 and UNS N06852) and Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219) Pipe and Tube
ASME SB622 Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube
ASME SB668 UNS N08028 Seamless Pipe and Tube
ASME SB690 Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloys (UNS N08366 and UNS N08367) Seamless Pipe and Tube
ASME SB729 Standard Specification for seamless UNS N08020, UNS N08026, and UNS N08024 nickel alloy pipe and Tube
ASME SB444 UNS N06625 Tubes Produced by Donghao Stainless Steel Pipe
Inconel 625 Typical application field as below:
1 .The Organic chemical process parts contains chloride, especially in the use of acid chloride catalyst.
2. The digester and bleacherin the use of paper pulp and paper making industry.
3.Absorption tower, re-heater,gas import board, fan, blender, fair water fin, flue and so on for using in flue gas desulfurization system.
4. The equipment and parts in the use of acidic gas environments.
5. Acetic acid and anhydride reaction generator
6. Sulfur acid cooling