The main difference between the Steel Deformed bar grade 60 and 40 or threaded steel bar is that the latter is much stronger and most commonly used in constructional purposes.
On the other hand, the 40 grade has a yield of 280 MPa or 40 kpsi. 40 grade steel has a yield of 280 MPa or 40 Ksi. 60 is a higher grade and is the mostly used grade in reinforced concrete.
Grade 40 means steel having yield strength of 40Ksi and grade 60 means steel having yield strength of 60 Ksi. So grade 60 is stronger than grade 40.
The difference is yield strength 40kpsi versus 60kpsi. On the practical side, in design, you can use a smaller size, or fewer 60 grade bar to achieve the same effect as 40 grade bar. On site, 60 are harder to bend and cut than 40. We will typically use a power bender/cutter for anything larger than 3/4″ grade 60 bar.
Apart from producing the finest cold twisted steel bars in the market, Razaque Steels pioneered the use of hot rolled deformed bars grade 40 & grade 60 (conforming to ASTM A 615).
