Higher carbon steel grade capable of attaining increased hardness and wear resistance after heat treatment. Used for components subjected to higher stresses and abrasion. Si/S/P per IS 1875 family convention (constant across all documented classes 1-6); no exact-designation row exists for this grade in IS 1875, standard reference kept as IS 1570.
Applications
springs, wear parts, hand tools, shafts, gears, agricultural implements