1)Materials; Cast iron HT200 2)Casting forming, milling, drilling machining 3) ... .Heat treatment Annealing, normalizing, tempering, quenching,quenching and High temperature tempering ,High frequency heat treatment,etc.Processing capacity +/-0.005mm ... and protection of sales area provided to our distributor. cast iron chiminea , antique cast iron furniture machining custom design cast iron auto parts