Very often one can see that the Inconel 625 tube is one of the most preferred material to be used in the nuclear industry.  For instance, the Inconel 625 annealed tubes, in nuclear power plants are an important part of steam generators, control rod components, reactor core as well as waste reprocessing equipment.

Inconel 625 tube

Inconel 625 tube

Nickel alloy 625 Seamless Tubing,

Nickel alloy 625 Seamless Tubing

Inconel 625 Exhaust Tubing

Inconel 625 Exhaust Tubing

 

This being said, this nickel based Alloy 625 seamless tube is an integral part of nuclear power plants on account of its many amiable properties. Basic thermodynamic principles are applied to the working mechanism of a steam generator.The materials that are used in the construction of the turbine, as well as other parts like the pipes such as the Inconel 625 tubing in a nuclear-powered steam generator, are specially made and designed to withstand the heat and radiation of the reactor.

The Alloy 625 tubing must not only be able to resist corrosion from water but this grade of UNS N06625 tube must not get corroded even after an extended period of time.Speaking of a nuclear reactor core, the core is a part of a system that contains nuclear fluid. The core is an area, where heat is generated as a result of ongoing nuclear reactions. A reason why the Inconel 625 seamless tubing is considered as an ideal material for the core is because of its ability to withstand elevated temperatures.

Moreover, the mechanical properties of the Inconel 625 seamless tube are not compromised on account of the very high heat. So not only does this part of the core have superior tensile strength, but the Alloy 625 tube is also tough and has great corrosion resistance properties.

 

Must Know

Inconel 625 Seamless Tubing or welded tube both comes in standard size upto 3 Inch OD. Pressure rating is different so for extreme temperature and pressure Smls is recomended.

 

Analysis Specification of Inconel 625 tube
Standard Quality Specification ASTM B444/ ASME SB444, ASTM B705/ ASME SB705
Sizes and Schedules 6 mm OD x 0.7 mm to 50.8 mm OD x 3 mm thk.
ASTM Standards ASTM, ASME and API
Schedule Chart SCH80, SCH20, SCH60, SCH80, SCH30, SCH140, SCH160, STD, SCH120, XS, XXS, SCH40,
Available Type LSAW /Seamless/ Fabricated /ERW/Welded Tubes
Form of tube Hydraulic, Square, Rectangular, Round etc
Most Common Length Cut Length, Double Random, Single Random etc
Tube Bevel End Threaded, Plain End, Beveled End,

 

Most commonly used Alloy 625 tube types? 
Nickel Alloy 625 Welded Tube
Nickel Alloy 625 Welded Tube
Alloy 625 Redrawn Tube
Alloy 625 Redrawn Tube
Astm B444 tube
Astm B444 tube
Alloy 625 Square Tube
alloy 625 Square Tube
	Inconel 625 Tubing
Inconel 625 Tubing
Uns N06625 Tube
Uns N06625 Tube
Alloy 625 Tube
Alloy 625 Tube
alloy 625 Annealed Tubes
Alloy 625 Annealed Tubes

 

Outside Diameter (OD) Alloy 625 seamless tubing

Inconel 625 tube

Size: 6 mm OD x 0.7 mm to 50.8 mm OD x 3 mm thk.

 

nickel alloy 625 welded tube Material Equivalent table
Grade UNS No Old British Euronorm GOST Japanese JIS
BS En No AFNOR
Inconel 625 N06625 NA 21 NiCr22Mo9Nb 2.4856 NC22DNB4M ХН75МБТЮ NCF 625

 

Tensile Strength of UNS N06625 Square Tube
Grade Elongation (% in 50mm) minimum Strength of Yield 0.2% Proof (MPa) minimum Strength of Tensile (MPa) minimum Pipe Hardness
Rockwell B (HR B) maximum Brinell (HB) maximum
625 42.5 Psi – 75,000 , MPa – 517 Psi – 1,35,000 , MPa -930
 
Chemical Structure of Alloy 625 exhaust tubing
Grade C Mn Si Fe S Cr2 Al-Ti Ni
625 min. 20.0 58.0
max. 0.10 0.50 0.50 5.0 0.015 23.0 0.40

 

What is the difference between alloy 625 rectangular tubes and annealed tubes?

The alloy 625 material is sought for high temperature services with high corrosion rates. The material is made up of nickel, chromium, molybdenum and columbium in its composition. There are different products made out of this alloy. The rectangular tubes are rectangular in cross section. The annealed tubes are annealed with heat treatment at 1093 degrees Celsius. The annealing makes the yield strength higher but reduces the impact strength of the annealed tubes. The rectangular tubes however, if not annealed can have high impact strength, which is useful for structural applications.