self hardening steel

例句：

1. 1. This typeof steel is commonly used in construction projects due to its self-hardening properties.
   由于其自硬化特性，这种类型的钢材常用于建筑项目中。
2. 2. The engineers designed the steel structure with the goal of achieving maximum strength and durability.
   工程师们设计了这个钢结构，目的是为了实现最大的强度和耐用性。
3. 3.Self-hardening steel has become increasingly popular in recent years as it offers a cost-effective alternative to traditional materials.
   近年来，自硬化钢因其成本效益高而越来越受欢迎，成为传统材料的理想替代产品。