高速公路排水沟盖板都需要模具具有必定的强耐性与耐磨性，能满意模具工作环境的需要，而且具有杰出的可锻性、切削加工性、淬硬性、淬透性及可磨削性，满意模具的工艺性能。

The drains and covers of expressways need mould. They have strong endurance and wear resistance. They can satisfy the needs of mould working environment, and have excellent forgings, machinability, hardenability, hardenability and grindability.