We manufacture forging ingots, billets, and blooms in carbon–manganese steel specifically for 20 mn2, designed for medium strength engineering applications where good toughness, hardenability, and reliable mechanical performance are required.
20Mn2 is a low carbon, high manganese engineering steel that offers improved hardenability and toughness compared to plain carbon steels of similar carbon content. The elevated manganese level enhances strength and fatigue resistance, making this grade suitable for dynamic and load-bearing components in automotive and general engineering applications.
| Element | Content (%) | Function / effect |
| Carbon (c) | 0.16 – 0.24 | Provides moderate strength with good toughness |
| Manganese (mn) | 1.30 – 1.70 | Significantly improves hardenability, strength, and toughness |
| Sulfur (s) | 0.050 max | Improves machinability; controlled to avoid brittleness |
| Phosphorus (p) | 0.050 max | Limited to maintain toughness |
| Silicon (si) | 0.10 – 0.35 | Acts as deoxidizer and improves strength |
| Chromium (cr) | Nil | Not intentionally added |
| Nickel (ni) | Nil | Not present |
| Molybdenum (mo) | Nil | Not present |
| Other elements | — | No significant alloying additions |
20Mn2is the ideal choice when better hardenability and toughness are required than standard low carbon steels. Its high manganese content provides improved mechanical performance, making it suitable for dynamic and load-bearing engineering applications.
| Grade | Carbon (%) | Key applications | Heat treatment | Comments |
| 20 mn2 | 0.16 – 0.24 | Shafts, forgings, auto parts | Normalizing / q&t | High manganese, good hardenability |
| C 20 | 0.17 – 0.23 | General engineering | Normalizing | Lower hardenability |
| En 15 | 0.30 – 0.40 | Engineering parts | Normalizing | Higher carbon |
| Aisi 1522 | 0.19 – 0.25 | Automotive components | Q&t | American equivalent |
20Mn2is a low carbon, high manganese engineering steel offering good strength, toughness, and fatigue resistance. With its excellent response to heat treatment and cost-effectiveness, it is widely used in automotive and general engineering components.