Nickel Alloy Electrodes, High Nickel Alloy Electrodes, Welding Nickel, Arc Electrodes, Thane India

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Nickel & High Nickel Alloy Electrodes

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Click here - Suggestions for Welding Nickel & High Nickel Alloys

 

 

 

Suggestions for Welding Nickel & High Nickel Alloys              Back to Top

Nickel and High Nickel Alloys are used in fabrication of equipment which have to withstand highly corrosive environments. Often the corrosion is enhanced by the operating conditions of high pressure and temperature. Various high nickel alloys are developed and are being developed to meet these demanding conditions. In some cases the mild and low alloy steel equipment and vessels are clad by nickel alloys to combat corrosion.

Techalloy Company, Inc. Baltimore Welding Division manufactures nickel and nickel alloy welding consumables for TIG, MIG, SAW and SMAW processes.

Welding of nickel is different from welding other metals and alloys. Two characteristics contribute to
this difference:
(1)  Nickel could form a tenacious viscous oxide during welding which restricts the wettability and flow of the weld metal.
(2)  Nickel is highly susceptible to embrittlement by sulfur, phosphorus, lead and other low-melting substances. The weld metal flow problem can be reduced by:

* Selecting an appropriate joint design.
* Choosing the correct type of gas and gas flow rate to ensure proper protection from atmospheric  
  oxygen.
* Clean welding consumables which do not contain any lubricants or oxides or contaminants.
* Selecting a superior formulated covered electrode to ensure proper flow and cleanliness. 

The weld area on both sides of the weld joint must be tightly grounded to remove oxide from the surface. Interpass cleaning is essential to ensure complete slag removal as well as fusion between the weld beads.

Weld joint designs used for nickel alloy welding should be different from those used for welding steels. The sluggish nature of the weld metal calls for more open joint which will provide better accessibility to the welder. Another characteristic of nickel alloy weld metal is the lower penetration, which makes the joints necessary to use smaller land at the root of the joint. For joining tubes and pipes, they should be purged and filled with inert gas before welding to avoid oxidation at the root. For manual welding, appropriate current range should be used to avoid overheating. Overheating of the electrode could result in loss of deoxidizers and breakdown of the binder of the flux leading to defective welding. MIG welds calls for helium additions to argon to improve the wetting of the weld metal. For TIG welding, argon or argon-helium mixtures are generally used. Gas flow rates of 30 to 50 CFH are required to obtain high quality welds. With submerged arc welding, the flux has to be pre-baked before welding to reduce the chanced of weld defects due to moisture. A procedure test is generally required to assure that the proposed welding parameters and filler metals result in sound and acceptable chemical and mechanical properties of the welds.

As the cleanliness of the welding consumables is of paramount importance, Techalloy Company, Inc. Baltimore Welding Division has incorporated in-line cleaning systems to ensure the requisite degree of cleanliness. The wires are so clean that we imprint out TIG wires with grade, heat number and size.

In the following pages you will find the description of the Products, their typical chemical composition, typical mechanical properties. Should you need to have more information or discuss applications or welding parameters, do not hesitate to contact us. Sales Department e-mail

 

 

 AWS A5.15 ENIFe-Cl                               Back to Top

This Electrode is used for welding of cast irons to themselves as well as for joining cast irons to mild steels. It is also employed for the repair of castings. The welds are moderately hard and require carbide tipped tools for machining. A preheat and interpass temperature of not less than 350 degrees F (175 degrees C) is required during welding.

Typical Chemical Composition of the deposit:

Carbon                    .9
Manganese               .74
Silicon                   2.09
Iron                      40.2
Copper                   1.9
Nickel                   54.5
Sulfur                      .006
Phosphorus              .012

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            84,000 PSI   580 MPA
Yield Strength               59,500 PSI   430 MPA
Elongation                     8%
 
 

AWS A5.15 ENi-Cl                   Back to Top

This Electrode is designed for welding of gray iron castings to themselves as well as joining them to mild steel or stainless steels. It is also used extensively to repair castings. The welds are quite machinable. A preheat and interpass temperatures of not less than 350 degrees F is recommended during welding.

Typical Chemical Composition of the deposit:

Carbon                    .85
Manganese               .25
Silicon                   1.73
Iron                      4.2
Copper                   1.45
Nickel                   91.50
Sulfur                      .005
Phosphorus              .015

Mechanical Properties of all weld metal (as welded):

Tensile Strength            72,000 PSI   500 MPA
Yield Strength               56,500 PSI   390 MPA
Elongation                     5%
 

AWS A5.11 ENiCrMo-3                     Back to Top

This Electrode is a covered electrode which is used to weld nickel-chromium-molybdenum alloys. It is also used extensively in overlay cladding where similar chemical composition is required on the clad side. Its applications include dissimilar joints between nickel-chromium-molybdenum alloys to either stainless steels, carbon, or low alloy steels. These electrodes are used in applications where the temperature ranges from cryogenic up to 1800 degree F.

Typical Chemical Composition of the deposit :

Carbon                    .03
Manganese               .35
Silicon                     .34
Iron                       1.5
Sulfur                     .005
Phosphorus             .009
Chromium            21.5
Molybdenum          9.2
Columbium +
Tantalum               3.55
Aluminum               .1
Titanium                .09
Nickel                 Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            114,500 PSI   790 MPA
Yield Strength               89,500 PSI   620 MPA
Elongation                     34%
 

AWS A5.1 EniCrCoMo-1                  Back to Top

This Electrode is a covered electrode which is used for welding of nickel-chromium-cobalt-molybdenum alloys (UNS Number N06617). This electrode can be used for overlay cladding where similar alloy is required.

Weld metal provides optimum strength and oxidation resistance above 1500 degrees F up to 2100 degrees F, especially when welding on base metals of nickel-iron-chromium alloys.

Typical Chemical Composition of the deposit :

Carbon                    .06
Manganese               .45
Silicon                     .35
Iron                       1.5
Sulfur                     .005
Phosphorus             .012
Chromium            21.65
Molybdenum          8.8
Cobalt                  11.85
Aluminum               .65
Titanium                .1
Nickel                 Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            110,000 PSI   760 MPA
Yield Strength               87,000 PSI   600 MPA
Elongation                     26%
Impact Strength           60 ft.lbs.
 

AWS A5.11 ENiCrMo-10                  Back to Top

This Electrode is used for welding of nickel-chromium-molybdenum alloys as well as for overlay cladding on carbon, low alloy, or stainless steels. They are also used for dissimilar joints between nickel-chromium-molybdenum alloys and stainless, carbon, or low alloy steels. Typical specifications for the nickel-chromium-molybdenum base metals are ASTM, F574, B619, B622 and B626 - - All of which have UNS Number N06022. Tech-Rod 122 offers excellent corrosion resistance in oxidizing as well as reducing media in a wide variety of chemical process environments. It offers an outstanding resistance to stress corrosion cracking, pitting and crevice corrosion.

Typical Chemical Composition of the deposit :

Carbon                    .014
Manganese            .35
Silicon                     .16
Chromium             21.2
Molybdenum        13.1
Tungsten               3.3
Sulfur                     .005
Phosphorus          .012
Nickel                    Balance
Iron                       3.9

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            114,000 PSI   790 MPA
Yield Strength               78,500 PSI   540 MPA
Elongation                     36%
Impact Strength           60 ft.lbs.
 

AWS A5.22 Eni-1                         Back to Top

This Electrode is used for welding of cast and wrought forms of commercially pure nickel. These electrodes can also be used for surfacing as well as dissimilar welding between nickel and steel or stainless steel.

Typical Chemical Composition of the deposit :

Carbon                     .04
Manganese             .45
Silicon                      .50
Iron                          .35
Titanium                 1.05
Phosphorus            .01
Sulfur                      .005
Nickel                      97.6

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            64,500 PSI   500 MPA
Yield Strength               58,500 PSI   400 MPA
Elongation                    26%
 

AWS A5.11 ENiCrFe-3                     Back to Top

This Electrode is used for welding of nickel-chromium-iron alloys to themselves, and for dissimilar welding between nickel-chromium-iron alloys and steels or stainless steels. The applications include surfacing as well as clad-side welding. High manganese of this weld deposit reduces the possibility of micro fissures. High manganese reduces creep strength, which limits its usage up to 900 degrees F.

Typical Chemical Composition of the deposit :

Carbon                     .03
Manganese              6.5
Silicon                     .42
Iron                        7.4
Chromium              15.25
Columbium +
Titanium                1.75
Nickel                  68.60
Sulfur                     .007
Phosphorus             .012


Mechanical Properties of all weld metal (as welded) :

Tensile Strength            84,500 PSI   580 MPA
Yield Strength               53,500 PSI   400 MPA
Elongation                     36%
 

AWS A5.6 ECuNi                            Back to Top

This Electrode is a copper-nickel, all-position electrode for shielded metal acr welding of wrought or cast alloys of similar composition as well as 80 Cu + 20 Ni and 90 Cu + 10 Ni alloys. It is also used for the clad side of copper-nickel clad steels. This filler metal is widely used in marine applications because of its good resistance to the corrosive effects of sea water.

Typical Chemical Composition of the deposit :

Carbon                   30.5
Manganese              1.8
Silicon                     .35
Iron                        .62
Sulfur                    .004
Phosphorus             .009
Lead                      .002
Titanium                .2
Copper               Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            54,500 PSI   380 MPA
Yield Strength               37,500 PSI   260 MPA
Elongation                     28%
 

AWS A5.11 ENiCu-7                        Back to Top

This Electrode is used for welding materials of nickel-copper alloys to themselves (such as ASTM, B127, B163, B164, B165--all of which have UNS Number N04400). They can also be used for overlay welding as well as for welding of clad steels where nickel-copper surfacing is required. Dissimilar welding applications include joining nickel 200 and copper-nickel alloys.

Typical Chemical Composition of the deposit:

Carbon                   .03
Manganese             3.2
Silicon                     .9
Iron                        .95
Sulfur                     .006
Phosphorus          .009
Aluminum              .05
Titanium                .65
Copper                  28.2
Nickel                    67.6


Mechanical Properties of all weld metal (as welded):

Tensile Strength            75,500 PSI   520 MPA
Yield Strength               52,000 PSI   360 MPA
Elongation                     39%
 

AWS A5.1 ENiCrMo-4                           Back to Top

This Electrode is used for welding materials of similar composition. This low carbon nickel-chromium-molybdenum filler metal can also be used for dissimilar welding between nickel base alloys and stainless steels, as well as for surfacing and cladding.

Due to high molybdenum content this alloy offers excellent resistance to stress corrosion cracking, pitting and crevice corrosion.

Typical Chemical Composition of the deposit :

Carbon                   .012
Manganese             .4
Silicon                   .14
Iron                      5.5
Molybdenum        16.1
Tungsten               3.25
Sulfur                    .004
Phosphorus             .012
Chromium             15.5
Nickel                    59.1

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            106,000 PSI   730 MPA
Yield Strength               78,500 PSI   540 MPA
Elongation                     39%
 

AWS A5.22 ENiCrFe-2                      Back to Top

This Electrode is used for welding of nickel-chromium-iron alloys to themselves as well as for dissimilar welding between various nickel alloys and carbon or stainless steels. These electrodes can also be used for overlay cladding where similar alloy is needed. These electrodes have wide applications ranging from cryogenic temperatures up to 1500 degrees F.

Typical Chemical Composition of the deposit :

Carbon                      .04
Manganese               1.75
Silicon                      .32
Chromium             15.5
Molybdenum           1.5
Columbium +
Tantalum               1.25
Iron                       8.5
Phosphorus              .009
Sulfur                      .006
Nickel                   71.15

Mechanical Properties of all weld metal (as welded):         Back to Top

Tensile Strength            89,000 PSI   610 MPA
Yield Strength               72,000 PSI   500 MPA
Elongation                     36%

 

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