Ferritic malleable cast iron is widely used in railway fittings, plumbing fittings, low pressure valves and other products because of its high strength and plasticity and good castability. Ferritic malleable cast iron has high production requirements and requires strict control of chemical composition and graphitization annealing process. However, in actual production, it is often affected by many factors, resulting in a bright white color after annealing, with very poor toughness and high hardness. , commonly known as "tempering hard material."
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