NiCr22Fe18Mo、 NiCr21Fe18Mo9、NC22FeD

NiCr22Fe18Mo overview

The superalloy NiCr22Fe18Mo is a nickel-chromium-molybdenum alloy with cobalt and tungsten added. NiCr22Fe18Mo alloy has excellent oxidation resistance at high temperatures up to 1200 ° C, and can also be used in neutral and reducing atmospheres. At the same time, NiCr22Fe18Mo alloy can resist carbonization and nitriding atmosphere.

 

NiCr22Fe18Mo Chemical Composition

%	Ni	Cr	C	Mn	Si	Mo	W	P	S
Min.	margin	20.5	0.05			8.0	0.2
Max.		23.0	0.15	1.0	1.0	10.0	1.0	0.04	0.03

 

NiCr22Fe18Mo density

Density: ρ = 8.3g / cm3

 

NiCr22Fe18Mo melting temperature range

Melting temperature range: 1260 ～ 1355 ℃

 

NiCr22Fe18Mo has the following features

● Excellent oxidation resistance up to 1200 ℃

● Good high temperature strength

● Good formability and weldability

● Good resistance to stress corrosion cracking

 

NiCr22Fe18Mo application areas

Due to its corrosion resistance in various atmospheres at high temperatures and excellent high-temperature strength, NiCr22Fe18Mo has been widely used in various high-temperature environments.

 

Typical application areas:

● Industrial and aviation turbines (combustion chambers, rectifiers, structural covers)

● Industrial furnace parts, support rollers, grids, ribbons and radiant tubes

● Spiral tube in petrochemical furnace

● High-temperature gas-cooled nuclear reactor

 

NiCr22Fe18Mo welding

NiCr22Fe18Mo can be welded by various welding processes, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual sub-arc welding, metal extremely inert gas shielded welding, and molten extremely inert gas shielded welding. Preference is given to pulsed arc welding.

Before welding, the material must be in the solution treatment state to remove oxide scale, oil stains and various mark marks. The width of each side of the weld is about 25mm, and it needs to be polished to a bright metal surface.

With low heat input, the inter-layer temperature does not exceed 100 ° C.

No pre- and post-weld heat treatment required

 

Special alloys commonly used in the petroleum industry:

Stainless steel: 316LN, 1.4529, 1.4539, 254SMO, 654SMO, etc.

High-temperature alloy: GH4049

Nickel-based alloys: Alloy 31, Alloy 926, Incoloy 925, Inconel 617, Nickel 201, etc.

Corrosion-resistant alloys: NS112, NS322, NS333, NS334