chinadayang@yeah.net +86-571-87169872
How To Choose Welding Rod For Steel Structure Welding

How To Choose Welding Rod For Steel Structure Welding

Mar 13, 2021

For structural steel welding, the choice of commonly used electrodes:

1. Low-carbon steel structural parts, generally use titanium-calcium type E4303 (J422), E5023 (J502) electrodes;


2. For important structural parts that require high plasticity, toughness, and crack resistance, use low-hydrogen type E4315 (J427), E5015 (J507) electrodes; use AC welding machine to choose AC-DC dual-purpose low-hydrogen electrodes E4316 (J426), E5016 (J506) Welding rod;


3. For thin parts with beautiful and smooth weld surface, it is best to use titanium E4313 (J421) welding rod;


4. It is not possible to eliminate oily embroideries and other dirt and welding structural parts that require greater penetration. It is best to use iron oxide type E4320 (J424) welding rod;


5. For structural parts with a large number of vertical seams, professional vertical welding rod E4300 (J420) can be selected when conditions permit.


(Select the diameter of the electrode according to the thickness of the weldment: 1. When the thickness is 4mm or less, the diameter of the electrode should be lower than the thickness; 2. When the thickness is 4-12mm, choose a 3.2-4mm diameter electrode; 3. When the thickness exceeds 12mm, choose 4mm Welding rod of diameter and above.)


What does the model and row number of the electrode represent?

J507: J stands for structural steel welding rod, 50 stands for the minimum tensile strength of weld metal, 7 stands for low-hydrogen coating, direct current;

E5015: E stands for welding rod, 50 stands for the minimum tensile strength of weld metal, 1 stands for all positions welding, 5 stands for low-hydrogen coating, direct current.