At GBR Metals, we take our quality control very seriously and begin our process right from the raw material we procure, the billets we manufacture to the TMT bars that we dispatch. GBR TMT is certified by the Bureau of Indian Standards for to the norms prescribed by the IS 1786:2008 standard [CM/L – 6943589]. Our billets are also certified as per the IS 2830:2012 standard [CM/L – 6943488]. Each division has its own separate testing facilities to ensure autonomy in the control procedures.
GBR products are also PWD approved. Click here to see the certificates
Quality control starts with ensuring that Raw Materials which contain harmful elements such as Phosphorous and Sulphur compounds are not included in the melting process.
As the batch is being prepared, a sample is taken to test the chemical composition and ensure that corrective measures can be taken if necessary.
Each batch is marked and segregated.
Once the batch is fully ready to be cast, a sample is taken to ascertain the final chemical composition.
Chemical compositions of the Billets are analysed before being unloaded at the rolling mill facility.
Billets are charged into the re-heating furnace according to analysed batches.
The process of Re-Heating and Rolling is controlled in such a way that the temperature of the bar at the last pass is a constant at around 950O C.
Samples are drawn every 30 minutes and checked for ribs and lugs finish, section weight and yield strengths.
The dimensions, shapes and angles of the ribs and lugs are strictly controlled to ensure uniformity.
Random samples are drawn and tested to ensure that they conform to the norms prescribed by the Bureau of Indian Standards.