Fe 500 for Steel for residential construction ?

Dear george

Use Fe 500, factor of safty will be more and it is good as  safety against earthquake will increase and some bottleneck at site during construction also covered.

Both are High yield strength steel cold twisted deformed bar as per IS 1786 but the main difference is that Yield Stress or 0.2% proof stress of fe 415 is 415 N/Sqmm and that of fe 500 is 500 N/sqmm. Fe415 is better for housing construction.

Rest of difference is given below:

1. Chemical composition:

Constituent/ Fe415 / Fe500

Carbon / 0.30 / 0.30
Sulphur / 0.06 / 0.055
Phosphorus/ 0.06 / 0.055
Sulphur & Phosphorus / 0.11 / 0.105

2. Elongation per cent,Min,on gauge length 5.65 sqrt( A) where A is the cross sectional area of the test piece:

Fe415 :14.5
Fe500 :12.0

3.Tensile Strength,Min:

Fe415 :
10% more than the actual 0.2% proof stress but not less than 485N/mm .sq
Fe500 :
8% more than the actual 0.2% proof stress but not less than 545N/mm.sq

.