This standard outlines the criteria for carbon steel cast billet ingots, billets, blooms, and slabs utilized in the production of various steel products according to Indian standards. The specifications detailed in this standard are applicable to billets, blooms, and slabs manufactured through the continuous casting process. However, the requirements of this standard do not extend to steel products covered by existing semi-finished material standards.

Steel production must adhere to relevant standards. Manufacturers have the flexibility to choose any steel-making process. Steel delivery should be in a semi-killed or killed state. The chemical composition of the steel must meet the ladle analysis specifications outlined in the corresponding finished product standard.

In billets, blooms, and slabs, it is imperative to prevent any detrimental defects like cracks, surface flaws, laminations, rough, jagged, or imperfect edges. A laboratory must be established, adequately equipped and staffed, to conduct various tests specified in the standard using the prescribed methods.

TESTS

The subsequent test must be conducted for Carbon Steel Cast Billet Ignots, Billets, Bloom & Slabs.

• Chemical compositio

• Freedom from defects

• Dimension and tolerances

• Other tests

MARKING

Marking procedures must adhere to IS 14650:1999 standards. Each cast billet ingot, billet, bloom, and slab must be stamped or painted with the cast number and the manufacturer's name or trademark. All compliant production should bear the standard mark (ISI Mark) corresponding to the applicable standard. Manufacturers seeking to use the standard mark (ISI mark) must obtain a BIS license from the Bureau of Indian Standards. The BIS grants this license after a successful assessment of manufacturing infrastructure, processes, quality control, and testing capabilities conducted during an on-site visit to the manufacturing premises.

PROCESS FOR BIS ISI MARK CERTIFICATION