What is the difference between Fe500 and Fe500D Grade TMT steel? Which one is better?

Whenever you buy TMT steel rods for your construction, I'm pretty sure that you simply would have noticed the word ‘Fe 500’ or ‘Fe 500D’ mentioned after the name.

Ever wondered what does this represent or signify?
Well, it represents the Grade of the TMT steel rod i.e., the strength of the steel is defined by its grade. Higher the grade of the steel the stronger it'll be.

To be more precise, the ‘Fe’ represents the chemical name of iron while the amount ‘500 or 550 or 600’ measures the minimum stress yield in N/m2, and eventually the letter ‘D’ signifies the ductility of the steel.

So what's the difference between Fe 500 and Fe 500D Grade TMT steel?
Fe 500 slightly differs from Fe 500D Grade in both its physical and chemical properties.

Property	Fe 500	Fe 500D
0.2 % proof stress/ Yield stress N/m2	500	500
Elongation percentage	12%	16%
Tensile strength	8 percent more than the actual 0.2 percent proof stress/ yield stress but not less than 545.0 N/m2	10 percent more than the actual 0.2 percent proof stress/ yield stress but not less than 565.0 N/m2

Even though the YTS ratio remains an equivalent for both, the elongation percentage varies i.e., higher the elongation you are the better are going to be the power of the TMT steel to perform in extreme conditions.

Constituent	Fe 500	Fe 500D
Carbon (%max)	0.30	0.25
Sulphur (%max)	0.055	0.040
Phosphorous (%max)	0.055	0.040
S+P (%max)	0.105	0.075

Reduction in carbon content improves the weld-ability property of the steel, while the reduced impure contents of phosphorous & sulfur make the TMT rods more tough and ductile.

So, Which may be a better Fe 500 Grade TMT or Fe 500D Grade TMT?
From the above two tables, we've clearly understood the essential difference between the 2 grades of steel, and from these observations, we will easily state the Fe 500D Grade TMT steel is the best performing than Fe 500 Grade.

What makes 500D far better steel is its higher resistance to super seismic activities like earthquake and its lower levels of carbon ensure easier & better welder-ability.

I hope our article has helped you understand the difference between the Fe 500 and 500D grade steel and also know which is best for your construction.

If you're trying to find superior quality Fe 500 and Fe500D Grade steel at the best market prices in Bengaluru, visit Meenakshi Build world or call us +91 99000 27700. At meenakshibuildworld.com, we supply TMT steel of all major brands and of all grades.