Mild Steel EN24
Materials Mild Steel EN24 (817M40)
Description
EN24 is a high-strength alloy steel with nickel, chromium, and molybdenum, offering outstanding toughness and fatigue resistance. It is widely used for components requiring high tensile strength and shock resistance, such as shafts, gears, and bolts. EN24 can be hardened and tempered for added performance and is a go-to material for demanding mechanical applications.
Key Features
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Nickel-chromium-molybdenum alloy steel
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High tensile strength and toughness
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Excellent fatigue and shock resistance
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Can be case or through hardened
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Good wear resistance when heat treated
Applications
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Gears and shafts
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High-performance fasteners
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Aircraft components
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Motorsport parts
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Heavily stressed mechanical parts
Availability
- Round bar
- Square bar
- Hexagon bar
| Chemical Composition (Weight %) | ||
| Min | Max | |
|---|---|---|
| C | 0.36 | 0.44 |
| Si | 0.10 | 0.35 |
| Mn | 0.45 | 0.70 |
| P | 0 | 0.035 |
| S | 0 | 0.04 |
| Mo | o.20 | 0.35 |
| Cr | 1.00 | 1.40 |
| Ni | 1.30 | 1.70 |
| Material Properties | |
| Machinability | Good |
| Weldability | Good |
| Formability | Poor |
| Corrosion Resistance | Very Poor |
| Related Material Specifications | |
| BS970 (1955) | EN24T |
| BS970/PD970 (1991 On.) | 817M40T |
| European | EN10277-5 |
| Werkstoff No. | 1.6582 |
| US SAE (AISI) | 4350 |
| Mechanical Properties | |
| Tensile Strength | 850 – 1000 N/mm² |
| Yield Strength | 650 N/mm² |
| Shear Strength | 510 – 600 N/mm² |
| Elongation | 13 % |
| Hardness | 248 – 302 Brinell |
| Thermal Conductivity | 44.5 W/m.K |
| Coefficient of Thermal Expansion | 1.23 x 106 /K |
| Elastic Modulus | 205000 Mpa |
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