age hardening steel

• 时效硬化钢

age hardening steel的用法和样例：

例句

1. Experiments of dent resistance show that the dent resistance of isotropic steel is poorer than BH steel.
   抗凹陷性测试结果表明，各向同性钢的抗凹陷性低于烘烤硬化钢。