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Inconel 625 UNS N06625 2.4856 Nickel Alloy Tubes




ASME SB444 N06625 Tubes

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 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℃ 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:

ASTM Specifications

Pipe Smls Pipe Welded Tube SMLS Tube Welded Sheet/Plate Bar Forging Fitting Wire
B444 B705 B444 B704 B443 B446 - - -

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

Inconel 625 Chemical composition
Alloy
%
Ni
Cr
Mo
Nb+N
Fe
Al
Ti
C
Mn
Si
Cu
P
S
625

Min.

58
20
8
3.15
 
 
       
 
 
 
Max.
 
23
10
4.15
5
0.4
0.4
0.1
0.5
0.5
0.5
0.015
0.015

Inconel 625 Physical properties
Density
8.4 g/cm³
Melting point
1290-1350℃

Mechanical Properties Representative Tensile Properties, bar, 1800° F anneal

Temp° F Tensile (psi) .2% Yield (psi) Elongation in 2 “ (%)
70 144,000 84,000 44
400 134,000 66,000 45
600 132,000 63,000 42.5
800 131,500 61,000 45
1000 130,000 60,500 48
1200 119,000 60,000 34
1400 78,000 58,500 59
1600 40,000 39,000 117

Inconel 625 Alloy m inimum mechanical properties in the room temperature
Alloy state
Yield strength
R P0. 2N/mm²
Elongation
A 5 %
625
760
345
30
≤220



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Nickel Alloy Seamless Tubes:

UNS N08020 2.4600 Nickel Alloy 20 Seamless Tubing
UNS N02200 2.4066 200 Nickel Alloy Seamless Tubing
UNS N04400 400 Nickel Alloy 2.4360 Nickel Alloy Tubing
UNS N08800 800 Nickel Alloy Seamless Tubes
UNS N08810 800H UNS N08810 Nickel Alloy Seamless Tubes
UNS N08811 800HT Nickel Alloy Seamless Tubes
UNS N08825 825 2.4858 Nickel Alloy Seamless Tubes
UNS N06600 600 2.4816 Nickel Alloy Seamless Tubes
UNS N06625 625 2.4856 Nickel Alloy Seamless Tubes
UNS N10276 C-276 2.4819 Nickel Alloy Seamless Tubing
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