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Choosing the right engineering steel grade is critical for performance, durability, and cost-efficiency. Among the most widely used alloy steels, EN24, EN36, and EN31 each serve different mechanical and industrial needs.
In this guide, we’ll compare EN24 vs EN36 vs EN31 engineering steel based on properties, applications, and selection criteria—so you can confidently choose the right steel for your project.
Engineering steels are high-strength alloy steels designed for mechanical components that demand durability, wear resistance, and load-bearing capacity. They are commonly used in automotive, aerospace, tooling, and heavy engineering industries.
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EN24 steel is a nickel-chromium-molybdenum alloy steel known for its excellent tensile strength and impact resistance, especially after heat treatment.
Best for: Components requiring strength + shock resistance
EN36 steel is a case-hardening alloy steel containing nickel, chromium, and molybdenum. It’s ideal where a hard outer surface and tough core are required.
Best for: Parts exposed to continuous wear and friction
EN31 steel is a high-carbon alloy steel widely used where abrasion resistance is critical. It offers exceptional hardness after heat treatment.
Best for: Applications requiring maximum hardness and wear resistance
| Property | EN24 | EN36 | EN31 |
|---|---|---|---|
| Strength | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐ |
| Wear Resistance | ⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Toughness | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐ |
| Heat Treatment | Quenched & tempered | Case hardened | Hardened & tempered |
| Typical Use | Shafts, gears | Heavy-duty gears | Bearings, tools |
When selecting between EN24, EN36, and EN31, consider:
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👉 Engineering Steels
We supply EN24, EN36, and EN31 in various forms including round bars, rods, and custom sizes.
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EN24 is known for high strength and toughness, EN36 is a case-hardening steel offering a hard surface with a tough core, while EN31 is a high-carbon steel best suited for wear-resistant applications.
EN24 is ideal for high-strength shafts, while EN36 is preferred for heavy-duty gears requiring excellent surface hardness and wear resistance.
No, EN31 steel is primarily designed for wear resistance and hardness. It is not recommended for high-impact or shock-loading applications where EN24 performs better.
Yes. EN24 is typically quenched and tempered, EN36 is case hardened, and EN31 is hardened and tempered to achieve high surface hardness.
The choice depends on load conditions, wear resistance requirements, toughness, and operating environment. Consulting an experienced engineering steel supplier helps ensure optimal material selection.
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