When welding you also need to factor in the shielding gas composition. If you have thicker metals then go for diameters of 0.035 to 0.045 inches. For most home applications you will need to use a diameter of 0.030 inches while for thinner metal the ideal diameter is 0.023 inches. The ER70S-3 is the one that is all purpose and ideal for a variety of metal types, the ER70S-6 contains more deoxidizers hence making it ideal for rusty or dirty steel. If you are working on steel then they are two most commonly used wires in MIG welding. The welds have slag that is visible on the finished weld which makes it less attractive than the MIG weld. The positive is you can use the flux core wire welding technique outside as there is not shielding gas to be blown by the wind.įlux core wire welding is better used for metals that are corroded or rusty. This protects the weld from contamination. What happens is the flux electrode releases shielding gas whenever it is exposed to heat. The difference between this and MIG welding is you do not require shielding gas like argon or carbon dioxide to protect the weld from outside contamination. In this method of self-shielded flux core welding an electrode is continuously fed through the welding gun and into the joint. MIG welding may not be the best way for welding rust metal, flux core wire welding does better. This makes it ideal for factories, shopping centers, nuclear weapons and bridges. The chemical combustion of the electrode does not have hydrogen. It is used in most structural welding due to its smoothness and ease of use. This electrode offers the most versatility. In cases where you do not need a lot of penetration like running downhill passes then the 6011 is ideal. The 6011 burns at a higher speed than the 7018 hence making it ideal for bridging and welding joists. When it comes to performance the 6011 chips better than the 6010 hence making it ideal for root passes in pipes. The 6010 runs on DCEP while the 6011 on current electrode positive (DCEP). ![]() This makes it ideal for both AC and DC currents. However, the last two digits mean it has a high content of cellulose potassium coating. There is little difference between this and the 6010. During welding you need to be extremely careful to avoid the electrode becoming drenched in by moisture. The slag is also easy to chip off hence making it ideal for root passes on pipes. The reason we have it in our list is because it offers deep penetration to the welds hence helping in cutting through rusty or corroded metal. This poses challenges to beginner welders as they try to grip the electrode as it produces a very tight arc. While the 6010 is a very common electrode by welders it is not very easy to use. The 6010 can be used for a variety of applications but you cannot use it with an AC welding machine. The drawback is you can only use it with DC current. In our case the “10” means that the rode contains high content of cellulose sodium coating. The last number is a classification that denotes individual electrode coatings. The “1” is the position in which you can use the welding rod. What this means is if you have an electrode with higher numbers the better. In our case the 60 means it can withstand 60,000 pounds per square inch. The first two numbers are the most important and stand for tensile strength. You can use the 60 for pipeliners, pipefitters and boilermakers.īefore you can identify the right welding rod electrode it is vital you learn about the various classifications. The electrodes also offer welders deeper penetration hence making them ideal for rippled and flat bead while leaving very little slag. What this means is that when welding you will notice that the weld puddle turns into solid from liquid very fast. When you doing the welding push the gun a bit slower while letting the molten bead flow onwards.Ħ0 electrodes are very similar in nature as they are both fast freeze rods. It has a tensile strength of 78,000 PSI and yield strength of 65,000 PSI. During welding you will need to mix your shielding gas with 98% argon/carbon dioxide and 2% oxygen. The wire comes with higher amounts of deoxidizers. The ER70S-6 MIG is a great wire for welding sheets with a moderate amount of rust or scale. ![]() ![]() The most common electrodes for MIG are 6010, 6011, 60. In this article we check out some MIG wires you can use for rusty metal. Preparation will determine how good the metallic surface is ready for welding. Some welders have suggested that flux core welding does a better job of going through the rusty wire than the MIG. You can start off with some grinding with steel wire before you can select the right wire. When it comes to welding rusty metal then preparation is key. Choosing the right welding rod is something troubles many welders.
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