a strong, hard metal made of carbon and iron used for construction and manufacturing

an essential or central part of something

किसी चीज़ का आवश्यक या केंद्रीय भाग

English Usage: The steel core of the argument was based on solid evidence.

Hindi Usage: उस तर्क का इस्पात कोर ठोस सबूत पर आधारित था.