We manufacture forging ingots, billets, and blooms in carbon steel specifically for EN3, tailored for general engineering and medium-strength applications. En 3 is a low to medium carbon steel known for its good balance of strength, toughness, and machinability. With higher carbon and manganese content than EN2A,EN3 offers improved mechanical properties while maintaining good formability and weldability. It is widely used for engineering components subjected to moderate loads and stresses.
| Element | Content (%) | Function / effect |
| Carbon (c) | 0.25 max | Increases strength and hardness |
| Manganese (mn) | 1.00 max | Improves strength, toughness, and hardenability |
| Sulfur (s) | Max 0.06 | Improves machinability; excess may cause brittleness |
| Phosphorus (p) | Max 0.06 | Improves machinability; controlled to maintain toughness |
| Silicon (si) | 0.05 – 0.35 | Acts as deoxidizer and increases strength |
| Chromium (cr) | Nil | Not present |
| Nickel (ni) | Nil | Not present |
| Molybdenum (mo) | Nil | Not present |
| Other elements | — | No significant additions |
En 3 provides an optimal combination of strength, machinability, and cost efficiency. It is ideal for components that require higher strength than mild steel but do not need alloy steel performance, making it a popular choice for general engineering and automotive applications.
| Grade | Carbon (%) | Key applications | Heat treatment | Comments |
| En 3 | 0.25 max | Shafts, fasteners, engineering parts | Annealing / normalizing | Good strength and machinability |
| Aisi 1020 | 0.18 – 0.23 | General engineering | Normalizing | American equivalent |
| C22 | 0.20 – 0.25 | Strucural and machined parts | As-rolled / normalized | European equivalent |
En 3 is a low to medium carbon steel suitable for a wide range of engineering applications. Its good mechanical properties, machinability, and economical cost make it a reliable material for parts operating under moderate load conditions.