Bars, Rods & Rebars
Rationalised sizes of Bars, Rods & Rebars
Plain Rounds SAIL TMT/ SAIL TMT HCR Mill
*Bright Bar Sizes

Abbreviations used :
BWRM :           Bhilai Wire Rod Mill
BMM :              Bhilai Merchant Mill
DMM :              Durgapur Merchant Mill
IMM :                IISCO Merchant Mill

Common grades : IS 2062/2006, IS 1786.2006 GRD (SAIL TMT and SAIL TMT HCR). Also available in the following foreign specifications :
ASTM-A 615 Grade 40 (for TMT wire rods) and ASTM-A 615 Grade 40/Grade 60 (for TMT Bars), if sufficient orders are available.

Signode strapping in bundles of 5 tonnes Plain Rounds/TMT rebars/TMT-HCR rebars in sizes 8, 10 and 12 mm are available in coils. The other sizes of Plain Rounds/TMT rebars/TMT-HCR rebars are available in straight lengths.
Tolerances on Lengths and Nominal Mass as per IS: 1786 - 1985
Specified Lengths
If bars are specified to be cut to certain lengths, each bar shall be cut within the deviations of + 75 mm, - 25 mm on the specified length, but if minimum lengths are specified, the deviations shall be + 50 mm, - 0 mm.

Tolerance on the Nominal Mass
Nominal Size Tolerance on the Nominal Mass, percent
*For individual sample plus tolerance is not specified.
** For coils batch tolerance is not applicable
Chemical Composition IS 2062/2006
Chemical Composition
Note: Micro alloy, if added, will not be exceed 0.040%
Note: Micro alloy, if added, will not be exceed 0.045%
Note: SAIL, TMT-HCRA: (Cu+cr)>0.40% •
SAIL TMT-HCRM: (Cu+Mo) > 0.40%
• SAIL TMT-HCR-P: (Cu+P)>0.40% •# For low alloy steel having Cu, Cr, P etc.
* In case of doubly reinforced beams using M15 and M20 grades of cement.
Mechanical Properties (Clause 5, 10.3 & 10.31)
Mechanical Properties: IS 1786 SAIL TMT Fe 415, 500 & 550
Note: 1. Mechanical properties will meet the requirement of IS: 1786.
2. For EQR, EQRHCR grades, apart from % EI, UTS/YS will be 1.18 min.
Note: Transverse Rib Angle not less than 70 Deg.
High Temperature Strength
SAIL TMT-HCR-A, SAIL TMT-HCR-M, SAIL TMT-HCR-P reinforcement bars exhibit higher thermal resistance even at temperatures up to 600°C. The retention of significant strength or, in other words, resistance to softening, is attributed to design of steel chemistry, presence of tempered martensite layer on the rebar surface and absence of any cold worked structural zone. Thus the thermally hardened SAIL TMT-HCR-A, SAIL TMT-HCR-M, SAIL TMT-HCR-P rebars are ideal for use in places prone to fire hazards.