Although high-strength alloy steels are hard and resist dents, scratches, and nicks, stress concentrations caused by mechanical damage can dramatically reduce the service life of a component.

• 虽然高强度合金钢的硬度很高，不容易产生斑点、抓痕或刻痕，但是，机加工损伤造成的应力集中会严重降低部件的使用寿命。