Preheating is essential in welding for All Questions › Category: Basic Electrical › Preheating is essential in welding for -1 Vote Up Vote Down Rajasri Mundrathi Staff asked 3 years ago Options: a) High speed steelb) Stainless steelc) Cast irond) German silver 1 Answers 0 Vote Up Vote Down Rajasri Mundrathi Staff answered 3 years ago The correct answer is Cast iron