0 Anonymous Asked: March 17, 2021In: Technology Which welding is best for cast iron? 0 Which welding is best for cast iron? Share Facebook 1 Answer Voted Oldest Recent Rakesh 0 Questions 51 Answers 0 Best Answers 129 Points View Profile Rakesh Added an answer on March 17, 2021 at 7:00 pm Manual metal arc welding (MMA) also known as SMAW welding is the most popular method for welding cast irons. The best results are obtained when welding with low current and lowest practical heat inputs. Many MMA consumables for cast iron have a special coating to minimize arc penetration. Less penetrating arcs and low heat input levels can be achieved with metal inert gas (MIG) and metal active gas (MAG) welding (referred to as GMAW in the United States), especially if the dip transfer process is used. 0 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Leave an answerCancel replyYou must login or register to add a new answer.