Science, Maths & Technology
Manual metal arc welding (MMA)
...free from hydrogen-forming cellulose. Instead, TiO2 and CaCO3 are added to the coating. Austenitic compositions (up to 25% chromium and 20% nickel) are also useful to prevent martensite formation. Cast irons are welded with nickel-rich or monel electrodes (Ni - Cu). Most non-ferrous metals and alloys are welded with electrodes of a composition similar to the metal being...