304 stainless steel with what welding is better

Stainless steel welding electrodes can be divided into chromium stainless steel welding rods and chromium-nickel stainless steel welding rods, these two types of welding electrodes where in line with the national standard, are in accordance with the provisions of the national standard GB/T983-1995 assessment. Chromium stainless steel has a certain degree of corrosion resistance (oxidizing acids, organic acids, cavitation) heat and corrosion resistance. Usually selected as power station, chemical, petroleum and other equipment materials. However, chromium stainless steel is generally poor weldability, attention should be paid to the welding process, heat treatment conditions and the selection of suitable electrodes. Chromium-nickel stainless steel welding electrode has good corrosion resistance and oxidation resistance, widely used in chemical industry, fertilizer, petroleum, medical machinery manufacturing. In order to prevent intergranular corrosion due to heating, the welding current should not be too large, less than carbon steel electrodes about 20%, the arc should not be too long, the interlayer fast cooling, to narrow the welding channel is appropriate.

304 stainless steel domestic grade is 0Cr18Ni9, generally with A102 or A107 electrodes

A107 must be DC welder

A102 stainless steel electrode features in line with the GB E308-16 comparable to the AWS E308-16 Description: A102 is a titanium-calcium-type flux Cr19Ni10 stainless steel electrode. The deposited metal has good mechanical properties and resistance to intergranular corrosion. There are excellent welding process performance and anti-porosity properties, flux skin resistance to redness, crack resistance. AC and DC dual-use.

Use: used to weld the working temperature below 300 ℃ corrosion-resistant 0Cr19Ni9 and 0Cr19Ni11Ti stainless steel structure.

A107 stainless steel electrode in accordance with GB E308-15 equivalent AWS E308-15

Description: A107 is an alkaline flux Cr19Ni10 stainless steel electrode. The molten metal has good mechanical properties and resistance to intergranular corrosion. DC reverse connection, can be all-position welding. Uses: Used for welding corrosion-resistant 0Cr19Ni9 stainless steel structure with a working temperature below 300 ℃, can also weld some poor weldability of steel (such as high-chromium steel, etc.) and surfacing stainless steel surface layer.