English self-hardening meaning in English  •  self-hardening का अर्थ अंग्रेजी में

Adjective

• Designating, or pert. to, any of various steels that harden when heated to above a red heat and cooled in air, usually in a blast of cold air with moderate rapidity, without quenching. Such steels are alloys of iron and carbon with manganese, tungsten and