| Grade Type | Examples | Typical Applications |
| Non-Alloy Structural Steels | S235JR, S355J2, E335, SAE 1018, SAE 1020 | Construction, structural frameworks, bridges, building supports, general engineering use |
| Free-Cutting Steels | 11SMn30, 11SMn37, 11SMnPb30, 11SMnPb37, 46S20, 44SMn28, 44SMnPb28 | High-speed machining, automotive parts, fasteners, precision components |
| Case-Hardening Steels | C15, 16MnCr(S)5, 20MnCr(S)5, 18NiCrMo5 | Gears, shafts, pins, and parts requiring a tough core with wear-resistant surface |
| Quenching & Tempering Steels | C35, C45, C50, 42CrMo(S)4, 39NiCrMo3 | Heavy machinery, automotive components, tools, and industrial equipment requiring strength |
| Stainless Steels | 303, 304, 304L, 316, 316L | Food processing, medical devices, marine equipment, chemical industries, corrosion resistance |
| Quenching & Tempering Steels | C15, 16MnCr(S)5, 20MnCr(S)5, 18NiCrMo5 | Gears, shafts, pins, and parts requiring a tough core with wear-resistant surface |