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Welding nickel and nickel alloys

Welding difficulties

Welding of nickel alloys is fraught with significant difficulties due to the high propensity for pore formation with a sharp change in the solubility of nitrogen, hydrogen and oxygen in the transition of metal from solid to liquid state. The main source of pores in argon arc welding is nitrogen, which is absorbed by liquid nickel in large quantities. When the weld cools, the nitrogen returns to the gaseous state, forming pores inside the metal.

Crystallization cracks

Welding nickel and nickel alloys is associated with a high propensity for the weld to develop crystallization cracks at the boundaries of large grains, which have a transcrystalline structure. To prevent the occurrence of cracks in the base metal, as well as in the weld, it is necessary to limit the content of harmful impurities and introduce the elements that bind sulfur in the most refractory compounds: up to 0.1% Mg and up to 5% Mn.


To obtain pore-free welds an important condition is the cleanliness of the surface of the electrode wire, welded edges, welding consumables and base metal (coating electrodes, fluxes, shielding gases), as well as binding of hydrogen and deoxidation during welding nickel. This is solved by the introduction of strong deoxidants in the weld pool (titanium, aluminum, etc.), as well as the use of coatings or fluxes that can convert hydrogen into stable volatile HP compounds or bind nickel oxides. For this reason, the welding technology can provide reliable protection of the welded area from atmospheric air, degassing of the weld pool and good deoxidation. An effective measure to prevent porosity is short arc welding (up to 1.5 mm), which significantly reduces the flow of gases from the atmosphere.


During welding the main attention is paid to ensuring the required performance properties of the joints. The technology can be absolutely different even for the same alloy. When arc welding nickel alloys, it is not necessary to achieve the same chemical composition of the weld as the base metal, because even a perfect match does not avoid cracks, pores , etc. defects. Complex alloying can be used to obtain the required weld properties and prevent defects.


Welding of nickel and nickel alloys from Auremo supplier meets GOST and international quality standards. Supplier "Auremo" offers to buy nickel rolled steel today on favorable terms. Large selection in stock. Buy today. On request we supply rolled steel of non-standard parameters, the price is the best in this segment of rolled products.

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We have the best quality-price ratio for the whole range of products. To order - welding nickel and nickel alloys, the price - the best from the supplier. Buy today. Wholesale customers price - favorable. Looking forward to your orders.

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