Hello and welcome back to another article in our Stick Rod Series. Today we will focus on Flux Coated Rods_How to Choose The Right Rod. Because of the technologies of mankind today there are many rods that are suitable for different purposes. There are also many companies that make the same rods or rods that are very similar.
For most of the basic stick rod needs there are not to many overwhelming choices or categories to deal with. Don’t get me wrong there are multiple choices but most of those rods will not be needed in the average welders life.
Even if you weld in a specialty field. You will probably stay within a select area of welding materials to do the repetition of your daily duties.
The most common metal you will ever weld on and to will be carbon steel. Carbon steel also known as iron, is the most basic metal and probably the most common. It is an element from natural deposits that has been smelted or refined into structural or pipe steel.
When welding to steel or iron the most common rods will be carbon based rods.
6010,7010, maybe 8010. These ten series rods are fast freeze rods that are basically the same in their characteristics and function. They go up in strength from 60,000 to 80,OOOlbs. in tensile strength. They are all position rods. These are AC rods which is the most common current today in America. There are some DC rods that are available like 6011 and 6013. These rods are good for fusing basic iron components together. Farm equipment, structural steel, pipe welding, shipyards, shop work, etc.
The complimentary rods that can go with these in similar applications would be 7018, 8018, all the way up to 11018. 70,000 to 110,OOOlb. tensile strength. These rods are not fast freeze AC rods they produce less sparks and spatter while welding. They are slower moving rods that produce a more consistent puddle and have more ductility than fast freeze rods. Fast freeze rods tend to be more brittle in composition. The difference is mainly in the flux.
Ductility is the ability of metal to be drawn out into wire. This means that in this process the metal doesn’t break or fatigue. There is a resilience in the metal to maintain its core characteristics.
There are special rods for cast iron welding. Metals that are cast have a crystalline core that is tough to weld on. Radnor makes an excellent rod for this called 5044. Of course there are many others. The cast iron process is actually best welded with brass. Brass is very difficult to make nice. Some welding is good looking but brass is not.
Shipyards use brass on propellers and props. Brazing is a popular method of welding with brass. There are rods that are more like a tig filler metal that have a flux coating around them that are used with a torch burning process and not electricity.
Inkonel is an iron/nickel composite for cast iron. Cast iron welding requires massive heat applied to the metals and a slow cool down period to keep the weld from cracking.
Old time lawn furniture like your grandmother had is usually cast iron. Old stoves, engine blocks (some not all), bailey blocks in the floor of a boiler or furnace, wrought iron needs a high nickel rod.
Well that’s all we have time for today. Next time we will talk about more on the Stick Rod Series. If you would like a f.r.ee ebook I wrote click here.
To your success!! Michael D. Treadway.