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Seeking the most appropriate materials for bridge crane

When selecting a crane parts, first working characteristics of bridge crane bodies take into account, for example, it will generally be unstable speed conditions in different conditions may be a load of features, from two points of view, high fatigue durability and high yield limit of material is the most suitable.
For bridge crane working at low temperature, material requirements and have different, it should have a high degree of toughness and impact toughness of landing the low critical temperature. In addition, for materials used in crane metal structure, weldability is quite critical, but should be combined with parts use, conditions of work, manufacturing processes and other factors into consideration, remember not the blind material with high strength.
In addition, any material determined to be economically reasonable conditions, to consider the potential cost of the part, and seeks to determine the most favourable material strength.