H&K Rolling Mill Engineers P. Ltd.              

              (The World No. 1 Supplier of QST & THERMEX Technology)

 Provides  under Exclusive & Perpetual Collaboration with HSE, Germany


Typical Thermex Rebar Properties                                                          Back


Over the past three decades, H&K India has been the leader in spreading awareness amongst civil engineers for the need to have high ductility rebars in India (irrespective of the Yield Strength) on account of nearly 60% land falling under the ‘moderate, high and very high’ seismic hazard categories. This has been done through papers presented at various international seminars organised by civil bodies such as India Chapter of American Concrete Institute, Indian Concrete Institute and articles published in leading Civil Engineering magazines. We have further advocated use of a simplified Indian Standard Code for rebars so that it is easy to implement. In keeping with our beliefs, all rebars made by our Licensees are strictly monitored for Stress Ratio (UTS:YS) and Elongation values and our Thermex Systems are designed to produce rebars with Yield Strength of 500 MPa (Thermex 500). The rebar processed through our Thermex System has properties which satisfy most International Grades - and is therefore very flexible and easily adaptable in most countries.

The rebar properties as per British Grade 500C of BS:4449-2005, introduced in 2006, is what we have been advocating since 1990 (implemented in our our first Thermex System at the Bar Mill of Durgapur Steel Plant of S.A.I.L.)

Our Thermex System has also successfully produced rebars as per grades B500CWR and B500DWR of ISO:6935-2.

Rebars with TS/YS stress ratio of >1.25 from plain carbon steel billets can also be produced by THERMEX Technology (e.g. STIL, Uganda)

Rebars are produced from steel with ladle chemical composition of:    

Element %
Carbon  0.25 max.
Sulphur 0.05 max
Phosphorous 0.05 max
Managanese 0.60 - 1.50
Cequiv 0.52 max









Property Grade 500 Typical Values 
Yield Strength, MPa  525 - 625
Stress Ratio, UTS/YS 1.15 - 1.35
Uniform Elongation, Agt 6.5 - 9.0
Elongation, A5 18 - 26





 Uniform Elongation    

Etched Sample








THERMEX, THERMEX QST & TMX are registered trademarks owned by H&K Rolling Mill Engineers Pvt. Ltd. in countries of INDIAN Region (except Bangladesh)

THERMEX is the regd. trademark of HSE Germany who has allowed H&K India to own it in the Indian Region countries (HSE registered the trademark in Bangladesh)