Brief description of electrodes for welding high-alloyed steels and alloys
In category "Electrodes for welding high-alloyed steels and alloys" include two groups of electrodes used for welding high-alloy steels and iron-Nickel alloys and Nickel-based:

According to the current classification high-alloy steels include alloys, the iron content of which more than 45%, and the total content of alloying elements is not less than 10%, counting for the upper limit when the concentration of one of the elements not less than 8% at the lower limit. The Nickel-based alloys include alloys with a content of at least 55% Nickel. Intermediate positions have iron-Nickel alloys.

In accordance with GOST 10052-75 electrodes for welding high-alloy corrosion-resistant, heat-resistant and heat-resistant steels and alloys according to the chemical composition of deposited metal and mechanical properties of the weld metal and weld metal are classified into 49 types (for example, electrodes of type e-07Х20Н9, e-10Х20Н70Г2М2Б2В, e-28Х24Н16Г6). The weld metal is a significant part of the electrodes is governed by the technical conditions of manufacturers.

Chemical composition and structure of the electrode weld metal for welding high-alloyed steels and alloys differ, sometimes greatly, from the composition and structure of welded materials. The main indicators decisive question of the choice of such electrodes is the provision of: basic operational characteristics of welded joints (mechanical properties, corrosion resistance, heat resistance, heat resistance), resistance of weld metal against the formation of cracks, the desired welding-technological properties.

Electrodes for welding high-alloy steels and alloys have coverage basic, rutile and rutile-basic types. Due to the low thermal conductivity and high electrical resistivity of the melting rate, and thus the deposition rate of the electrodes with rods of high-alloy steels and alloys is significantly higher than that of electrodes for welding carbon, low alloy and alloy steels. However, the increased resistivity of the metal electrode rod determines the necessity of application in welding of low values of current and reduce the length of the rods (electrodes). Otherwise due to excessive heating of the rod possible overheating of the coating and the changing nature of its melting point, until the forking separate pieces.

Welding is usually performed with direct current reverse polarity.