TMT Steel Bar

Characteristics

NS 191 requirement for Grade-Fe415 (CTD)
NS 191 requirement for Grade-Fe500 (TMT)
Typical Values for PK Thermax TMT STEEL BARS
0.2% Proof Stress (N/mm2)
415 min
500min
510-575*
Ultimate Tensile Strength (N/mm2)
485(10% more than actual 0.2% proof yield stress)
545(8% more than actual yield stress)
590-650
Elongation % on gauge length 5.65( Where A0 is the cross sectional area.)
14.5 min
12 min
16-25
Bend test
Up to and including 22mm & over 22mm
No transverse cracks in the bent portion on bending to 180 degree Mandrel Diameters
3Dia
4Dia
No transverse cracks in the bent portion on bending to 180 degree
Mandrel Diameters
4Dia
5Dia
No transverse crack in bent portion
Rebend Test
Up to and including 10mm over 10mm
No fractures in the bent portion and rebending to 157.5 Deg.-135 Deg. After keeping in boiling water for 30 minutes & subsequent cooling at ambient temperature.
Mandrel Diameters
5 Dia
7 Dia
No fractures in the bent portion and rebending to 157.5 Deg.-135 Deg. After keeping in boiling water for 30 minutes & subsequent cooling at ambient temperature.
Mandrel Diameters
5 Dia
7 Dia
There is no fracture in bent portion
5 Dia
7 Dia