Which is the strongest TMT bar?

Yield strength, or the highest stress a material can bear before permanently deforming, is commonly used to gauge the strength of TMT bars.

Higher grade TMT bars often have higher yield and tensile strengths, which makes them appropriate for applications needing exceptional load-bearing capacity and structural performance. The following list of common TMT bar grades and minimum yield strengths corresponds to each one:

Fe-415: 415 N/mm² is the minimum yield strength
Fe-500: 500 N/mm² as the minimum yield strength
Fe-550: 550 N/mm² is the minimum yield strength.
Fe-600: 600 N/mm² is the minimum yield strength