EN24 Steel Overview
EN24 is a high strength steel alloy, also known as 4340, supplied in final heat-treated condition as a through-hardening alloy steel. It is machinable in the 'T' condition and best suited for use in heavy-duty commercial shafts, axles, and other components. The material maintains impact strength at lower temperatures, making it suitable for offshore applications.
The alloy combines nickel, chromium, and molybdenum, offering incredible tensile strength with excellent ductility and resistance to water.
EN24 Equivalent Materials
EN24 can be replaced with equivalent materials including 4340 (USA/ASTM), 34Cr2Ni2Mo (China GB/T), and SNCM439 (Vietnam/Japan JIS).
Key Characteristics
- Supplied in final heat-treated (hardened and tempered) condition
- Through-hardening alloy steel, machinable in the T condition
- Maintains impact strength at lower temperatures, suitable for offshore applications
- Excellent ductility and resistance to water
- Surface hardening possible through nitriding or induction
Uses of EN24
EN24 serves multiple industries and applications including stamping dies, rubber molds, cranes, die casting, automotive, machine tools, shafts, gears, spindles, and various fasteners. It is also used for woodworking tools, drills, broaches, and cold-formed dies.
Physical Properties
| Property | Metric | US/Imperial |
|---|---|---|
| Density | 7.80 g/cc | 0.282 lb/in3 |
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon, C | 0.32 - 0.39 |
| Chromium, Cr | 1.3 - 1.7 |
| Nickel, Ni | 1.3 - 1.7 |
| Molybdenum, Mo | 0.15 - 0.30 |
| Manganese, Mn | 0.50 - 0.80 |
| Iron, Fe | 94.64 - 96.33 |
