AWS A5.18 ER70S-3

                                              EN ISO 14341-A-G 38 4 C1/M21 2Si1

Description:ER50-3 is a copper-plated welding wire for gas protection, which can be protected by CO2 or argon rich gas during welding. It is suitable for single pass welding and multi-pass welding. It has excellent welding process performance, small splash, good weld formation and good crack resistance. It is especially suitable for high speed welding of thin plate with small current.Application: Welding of carbon steel (such as Q195, Q215, etc.) and some low alloy steel (such as 12Mn) for Bridges, vehicles, pipe fittings.

Chemical composition of welding wire example :(mass percentage) %

Non-alloy steel and fine grain steel gas welding wire precautions and operation points

Note

1, in order to ensure welding performance, the surface of the workpiece should be cleaned up before welding rust, oil, water and so on;

2, welding, the extension length of the wire should pay special attention to, although too long can improve the welding deposit rate, but will worsen the welding process and weld performance, such as spatter increase, rough molding. Suggestion: When the current is less than 250A, the extension length of the welding wire is about (10~18) mm; when the current is greater than 250A, the extension length of the welding wire is about (20~25) mm;

3, welding, when the wind speed is more than 1.8m/s or high welding, should use windproof measures, can not use fans and other direct blowing welding;

4, the protection gas flow is best controlled between (15~20) L/min;

5, after opening the package, the welding wire directly exposed to the air should avoid contact with water, paint, oil, etc., should be used as soon as possible, so as not to affect the use of the welding wire;

6, the diameter of the welding wire should be consistent with the specifications of the conductive nozzle, too much will cause poor conduction and affect the formation of the weld. And it will make the splash bigger;

7, too large or too small welding line energy will seriously affect the overall performance of the weld, should cause more attention;

8, the above recommendations are for reference only, the user should be evaluated according to the specific situation before use, in order to be more realistic.

Welding wire handling and storage:

1. When handling the welding wire into a disk, it should be handled gently to prevent falling;

2. Welding wire is afraid of water, not near fire, and not resistant to high temperature;

3, the welding wire should be stored in a closed, dry and clean room, the room temperature should not be less than 5℃, the relative humidity is not more than 60%;

4, the warehouse storage, welding wire should be placed on the wooden tray or iron rack, the distance from the wall should be greater than 30cm, and according to the specifications, models, etc., placed respectively, to prevent mixing, the use should be in accordance with the "first in first out" principle.