Stainless steel welding rods can weld corrosion-resistant stainless steel structures with working temperatures below 300°C.

Through the welding core or coating, a certain amount of carbide-forming elements (such as niobium, molybdenum, titanium, etc.) can be penetrated into the weld metal to form stable carbides with carbon to prevent grains Chromium carbides are formed at the boundary.

The increase in carbon will cause intergranular corrosion in the welds of austenitic stainless steel (or ferritic stainless steel), so the carbon content in the welding core and coating raw materials must be strictly controlled. It is recommended Use low-carbon or ultra-low-carbon welding core, and use low-carbon or carbon-free iron alloys and metal elements as raw materials for the coating.

Extended information:

The G in front of the electrode brand indicates chromium stainless steel electrode; A indicates austenitic stainless steel electrode. The first digit after G or A indicates the main chemical composition of the weld metal.

The second digit after G or A represents different grades of the same main chemical composition of the weld. For welding rods with the same coating type, there can be 10 grades, according to 0, 1, 2, 3,...,8,9 are arranged in order.

The third digit after G or A indicates the coating type and welding power source type. Stainless steel welding rod grades only use the two numbers 2 and 7. "2" means titanium calcium type electrode, AC or DC reverse polarity power supply welding; "7" means low hydrogen type electrode (also known as alkaline electrode), limited to DC or reverse polarity power supply welding.

Baidu Encyclopedia--Stainless Steel Welding Rod

Baidu Encyclopedia--Welding Rod