Technical Information for Arcelor Mittal TMT Steel Bars Fe500D

Bureau of Indian Standards has introduced a new standard IS1786: 2008 wherein new grades of steel bars have been launched. One of the grades launched is Fe 500D.

500 stands for the minimum yield stress in N/mm2 . The letter D stands denotes that such bars have higher values of minimum percentage elongation.  Along with this the standards have lowered the quantity of S and P values in the bar which are harmful for steels used in construction.  Also the value of Carbon percentage has been lowered and the physical properties have been enhanced.  Please find below the various values as per the new standard and comparison with Arcelor Mittal 500D.

BIS Specifications

Typical Value   of

Fe 500

Fe 500D

Arcelor   Mittal 500D*

Chemical Properties (max)

%Carbon (C)

0.30

0.25

0.25 max

%Carbon Equivalent (CE)

0.42

0.42

0.40max

%Sulphur  (S)

0.055

0.040

0.035max

% Phosphorous (P)

0.055

0.040

0.035max

% S + P

0.105

0.075

0.070max

Nitrogen (ppm)

120

120

100max

Mechanical Properties (min)

Yield Stress (N/mm2 )- YS

500

500

540min

Ultimate Tensile Stress (N/mm2 )-UTS

545

565

600 min

UTS/YS Ratio

1.08

1.10

1.12min

%Elongation

12

16

18min

*as obtained in 90% of the   heat

 

As can be seen from the above table Arcelor Mittal 500D TMT Bars have

1) Superior Chemical Properties as compared to the relevant required maximum values of Carbon,Sulphurand Phosphorous.

2) Superior Physical Properties

3) Superior UTS/YS Ratio

4) Superior % Elongation

5) Better Nitrogen Values

Other advantages of Arcelor Mittal TMT bars are

1)      It is in length of 12metres.

2)      It is packed in bundles of approximate 2MT

3)      Prices are very competitive compared to Main Steel Plants