medium carbon tool steel

例句：

1. 1. Thistype of steel is commonly used for making tools and machinery parts.
   这种钢材常用于制作工具和机械部件。
2. 2. The steel was chosen because it has a good combination of strength and toughness.
   这种钢材被选用是因为它具有强度和韧性的良好结合。
3. 3.The steel's hardness can be adjusted to suit different applications.
   这种钢材的硬度可以调整以适应不同的应用需求。