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Jiangsu Cheonny Overlay Co., Ltd.

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Industry Oil Gas Membrane Wall Boiler Nickel Base Alloy

Model Number : inconel overlay membrane

Certification : ISO, ASME, EN

Place of Origin : CHINA

MOQ : 10 tons

Price : Negotiable

Payment Terms : L/C, T/T, Western Union

Supply Ability : 1000 tons / months

Delivery Time : 30 working days

Packaging Details : Iron Frame

Application : Industry,oil and gas

Grade : Nickel Base Alloy,Inconel 625

Type : Nickel Pipe,Nickel tube/pipe

Shape : Inconel tube / pipe

Material : Inconel,Monel/Inconel/Incoloy/ hastelloy/PH Stainless steel,Inconel 600/UNS N06600

Standard : Inconel600,EN,ASTM

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Nickel Alloy/Inconel 625 Cladding Boiler membrane/water wall panel

Production Information

Alloy 625 type filler and cladding material has a single phase austenitic structure and a chemical composition comparable to Alloy 625 – nominally 22%Cr, 9%Mo, 3.5%Nb and balance Ni. It has excellent heat and corrosion resistance and is commonly used for components used in steam generation with service temperatures up to 450°C.

Component	Non-clad steel	Steel clad with Alloy 625
Membrane wall in combustion room – lower area	6-9 months	3-4 years
Membrane wall in combustion room – higher area	2 years	> 8 years
Reheater	3-4 years	> 4 years

Base material	» Pipe walls and single tubes in P235GH, 15Mo3, 13CrMo44, 10CrMo910
Welding materials	» Alloy 622 (US), alloy 625, alloy 686 (super heater tubes) » Coating alternatives under investigation: metal powder, ceramic, galvanizing
Shielding gas	» 4-component shielding gas: He = 32 %, H2 = 2 %, CO2 = 0.05 %, remainder Ar » Alternative choices of shielding gas
Welding equipment	» GMAweldingequipmentwithpulsed-currentpowersources » Automatic burner processing
Welding position	» Vertical down position preferred, layer width 15 - 20 mm
Option for application	» On-site in the boiler with mobile welding equipment, minimum wall thickness 3 mm » Welding in the workshop weld metal overlay on new pipe walls and single tubes
Technical requirements	» Overlay thickness 2 mm » Two layers preferred » Sandblastingoftheweldingsurface » Water circulation in the tubes » Content of Fe in welding surface < 5 % » Content of Fe in welding material < 1 % » Consider shrinkage » End of cladding round-welded with TIG, notch-free

Industry Oil Gas Membrane Wall Boiler Nickel Base Alloy

The most common problem in surfacing is cracking. The main methods to prevent cracking are as follows

1. Preheat before welding, control interlayer temperature and slow cooling after welding

2. Stress relief heat treatment after welding

3. Avoid multi-layer surfacing and use low hydrogen surfacing electrode

4. If necessary, build up the transition layer between the surfacing layer and the base metal (use the electrode with low carbon equivalent and high toughness)

Attention must be paid to butt welding:

1. According to the use requirements, reasonable selection of surfacing alloy

2. Reduce the dilution ratio of base metal as much as possible

3. Improve productivity

4. It is expected that the hardfacing metal and base metal have similar expansion coefficient and phase transformation temperature

Purpose of Inconel Cladding on surface :

1. Extend service life

2. Reduce costs

3. Reduce spare parts

4. Reduce maintenance

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RFQ

Q: Are you trading company or manufacturer ?

A: We are manufacturer

Q: How long is your delivery time?

A: Generally 5-10 days if the goods are in stock. or 25-35days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample extra

Q: What is your terms of payment ?

A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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