This document is the Indian Standard specification for carbon steel billets, blooms, slabs and bars for forgings. It outlines 9 classes of carbon steel materials and specifies their chemical composition ranges, mechanical properties, manufacturing process requirements, dimensional tolerances, and testing methods. Key points include:

- Chemical composition limits for carbon, silicon, manganese, phosphorus, and sulfur are defined for each class. 

- Tensile properties or hardness must meet values in Table 2. Ladle analysis and optional check analysis chemical ranges are specified.

- Material must be manufactured by open hearth, electric arc, or other suitable process from killed steel with sufficient discard. Conditioning is allowed to a limited depth

Indian Standard Carbon Steel Billets, Blooms, Slabs Bars For Forgings - Specu3Catio'N (Fifih Revision) PDF

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