IS 1875:1992 Class 1A Steel: Specifications & Listings

IS 1875:1992 Class 1A: Class 1A is a carbon steel in IS 1875:1992 for billets, blooms, slabs and bars used to make forgings; its steel designation is 15C8, with 0.10-0.20% carbon and 0.60-0.90% manganese. Normalised, it has a minimum tensile strength of 410 MPa and a minimum yield strength of 220 MPa for sections up to 100 mm. It is made from killed steel; for larger sections or hardened and tempered supply, properties are agreed with the supplier.